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DigitalGlobeImagery Support Data (ISD)Documentation
Supplemental information for the Product Guide
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Table of Contents
1. Introduction .......................................................................................................................................... 31.1 Background ............................................................................................................................... 31.2 Scope ......................................................................................................................................... 3
2. Image Support Data .............................................................................................................................. 42.1 ISD File Description .................................................................................................................. 42.2 File Layout ................................................................................................................................ 6
3. General Format and Conventions ......................................................................................................... 73.1 General File Format ................................................................................................................... 7
3.1.1 PVL Format ................................................................................................................... 73.1.2 XML Format .................................................................................................................. 7
3.2 Delivery Level Support Data ..................................................................................................... 73.2.1 Delivery Index (README) Contents ............................................................................ 73.2.2 Delivery Layout File .................................................................................................... 103.2.3 Delivery Geographic Location Map Files .................................................................... 10
3.3 Product Component-Level Support Data ................................................................................ 133.3.1 Product Component Index (README) ....................................................................... 133.3.2 Image Metadata ............................................................................................................ 143.3.3 Product Browse file ...................................................................................................... 283.3.4 Tile Map ....................................................................................................................... 283.3.5 Attitude Data ................................................................................................................ 313.3.6 Ephemeris Data ............................................................................................................ 333.3.7 Rational Polynomial Coefficients ................................................................................ 353.3.8 Product Component XML File .................................................................................... 413.3.9 Manifest File ................................................................................................................ 423.3.10 Stereo File .................................................................................................................... 43
Appendix 1.0 Abbreviations, Acronyms, and Terms ......................................................................... 46Appendix 2.0 Example: PVL Format ................................................................................................. 49Appendix 3.0 Example: XML Format ................................................................................................ 52Appendix 4.0 Example: Tile Map File ............................................................................................... 55
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List of Figures
Figure 1. File Layout diagram ..................................................................................................... 6
Figure 2. Sample Product Browse File ......................................................................................28
Figure 3. Stereo Geometry Angles ............................................................................................44
List of Tables
Table 1. Image Support Data (ISD) Files Delivered with Product Type. .................................... 4
Table 2. Top Level Delivery Index (README) Contents (ISDF.DEL.README) ........................ 8
Table 3. Delivery Shapefile Names and Attributes ...................................................................11
Table 4. Product Component Index (README) Contents ........................................................14
Table 5. Image Metadata Contents ..........................................................................................14
Table 6. Tile Map Contents ......................................................................................................29
Table 7. Attitude File Contents (.ATT) ......................................................................................32
Table 8. Ephemeris File Contents (.EPH) .................................................................................33
Table 9. RPC Terms .................................................................................................................36
Table 10. RPC00B Contents .....................................................................................................36
Table 11. Stereo Contents .......................................................................................................44
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1. Introduction
1.1 Background
This document describes the Image Support Data (ISD) format for QuickBird and WorldView
Imagery products. These products are available in a variety of product types, and contain
different ISD depending on the type of the product. This document describes the ISD for the
following DigitalGlobe product types:
Basic Products Stereo Products
Standard Products
Orthorectified Products
Digital Elevation Model Products
The ISD that is delivered with all QuickBird and WorldView Imagery products, regardless of
product type, is described in the main body of the document.
1.2 Scope
This document specifies the format of ISD that DigitalGlobe delivers to customers with
WorldView and QuickBird imagery products. These data are delivered in numerous files. The
document describes the overall structure of these files and specifies the data content and formatof individual fields. It also presents some technical information to explain the significance of the
data.
The term "image" in this document often refers to a general two-dimensional image product,
including a Digital Elevation Model (DEM) or another form of height model, as well as an image
in the stricter sense. The context and the use of specific product type names should make it clearwhich meaning is intended.
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2. Image Support Data
All Imagery Products are delivered with a set of metadata files called Image Support Data (ISD).This section describes Version 23.11 of the ISD specification. The number and types of filesdelivered varies depending on the product ordered. The Image Support Data files can beviewed as a collection point for all useful ancillary data. Table 1 lists the Image Support Datafiles that are delivered with each product type.
File Name Extension Basic ImageryStandard
Imagery
Orthorectified
Imagery
DELIVERY LEVEL ISD
Top Level Index (Readme) File .TXT XX XX XXTop Level Index (XML) File .XML XX XX XXLayout File .JPG XX XX XXShapefiles .shx, .shp, .dbf XX XX XX
Manifest File .MAN FTP only FTP only FTP onlyEnd of Transfer File .TXT FTP only FTP only FTP only
PRODUCT COMPONENT LEVEL ISD
Product Component Index
(Subdirectory Readme) File.TXT XX XX XX
License File .TXT XX XX XX
Image Metadata File .IMD XX XX XXProduct Browse File .JPG XX XX XX
Tile Map File .TIL XX XX XXAttitude File .ATT XX
Ephemeris File .EPH XX
Geometric Calibration File .GEO XX
RPC00B File .RPB XX XX
XML File .XML XX XX XX
Table 1. Image Support Data (ISD) Files Delivered with Product Type.
2.1 ISD File Description
Products include ISD at two levels: one set of Delivery ISD, and one set of Product ComponentISD for each product option ordered. The number of product components depends on thelayout of the order polygon with respect to scene or strip boundaries. If the order polygon isentirely contained within a single scene or strip, then only one product component will bedelivered. If an order polygon crosses strip or scene boundaries, then the imagery product willbe divided into multiple product components. Product options include panchromatic,multispectral, or pan-sharpened.
The Delivery ISD (one set per delivery) consists of:
Top Level Index (Readme) File This file contains a list of names of the product files and theISD files, along with copyright information for the entire product delivery.
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Top Level Index XML File This file contains the same information as the Top Level Index(README) file but in XML format.
Layout File This file spatially illustrates how the delivery order is spread out across the mediaincluding product and order polygon extents. The map includes volume and product labels. Thefile is in the standard jpeg format. Media volume information is not included for electronicdeliveries.
Shapefiles These files spatially illustrate the product layout in a similar way to the layout fileexcept in shapefile format. The files represent the order polygon, strip boundaries, productboundaries, and tile boundaries.
Manifest File The manifest file is included with electronic (FTP) deliveries, only. The filecontains the directory listing of the files delivered with the product
End of Transfer File The end of transfer file is included with electronic (FTP) deliveries, only.The appearance of this file on the FTP site indicates that DigitalGlobe has completedtransferring all product files. It is a zero length file.
The Product Component ISD (one set per product component option) consists of:
Product Component Index (Subdirectory Readme) File The README file providescopyright information and the names of the ISD files for a single product within a delivery.
License File The license file contains the text of the selected license.
Image Metadata File The image metadata file describes key attributes about the image
product, including product level, corner coordinates, and projection information, and time ofacquisition.
Product Browse FileThe product browse file is a JPEG compressed browse image of thedelivered product.
Tile Map The tile map file assists the customer in determining what tile to ingest to look at aspecific part of the order polygon.
Attitude File The attitude includes the time of first data point, the number of points, and theinterval between the points and attitude information.
Ephemeris File The ephemeris file includes the time of first data point, the number of points,
and the interval between the points and ephemeris information.
Geometric Calibration File The geometric calibration file contains the standardphotogrammetric parameters of a virtual camera that models the corresponding camera andoptical system for Basic Imagery products.
RPC00B File The RPC00B file contains the RPC information, which can be used to rectify theimage. This is a mathematical mapping from object space coordinates to image spacecoordinates.
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XML File This file contains the same information as the combined README, Licensing,Image Metadata, Tile Map and RPC00B files, in XML format. For Basic Imagery Products, the
attitude, ephemeris, and geometric calibration file are included as well.
2.2 File Layout
This section describes the structure by which the ISD files are organized for delivery. Figure 10diagrams the layout as it applies to delivery of imagery and ISD files for all media types.Product Level Directories are identified with the product id and a 3 character descriptor: PAN forPanchromatic, MUL for Multispectral, PSH for Pansharpened, and MOS for Mosaickedproducts.
_PAN
_MUL
-
-
GIS_FILES
(Geographic Location Map files)
-
_PSH
-
-
-
FTP only
_MOS
-
Figure 1. File Layout diagram
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3. General Format and Conventions
3.1 General File Format
ISD files are provided in the Parameter Value Language (PVL). The information in PVLformat is provided in multiple files while the information in XML is provided in a singlefile. The information provided in PVL and XML are the same semantically but differ onlyin syntax.
3.1.1 PVL Format
Each tag consists of a variable length parameter name and a parameter value, in theform parameterName = value followed by a semi-colon. The value can be an integer(decimal, binary, octal, or hexadecimal), a floating-point number, a character string (one
or more characters), a UTC time, a set, or a list. The format for UTC time is YYYY-MM-DDThh:mm:ss.ddddddZ. Character strings values must be enclosed in doublequotation marks. Sets are delimited by { }, and lists are delimited by ( ). Nested setsand lists are allowed. Comments in the file begin with a slash-asterisk /* and end withan asterisk-slash */.Named groups begin with BEGIN_GROUP = GROUPNAME and end withEND_GROUP = GROUPNAME. Nested groups are allowed. The end of a PVL moduleis indicated by the keyword END, followed by a semi-colon.Only required fields need to be specified in the ISD files.To see an example of the PVL formatted file, please see Appendix 1.0
3.1.2 XML Format
All the information contained in the PVL ISD files is also provided in XML format. Tosee an example of the possible XML formatted file, please seeAppendix 2.0.
3.2 Delivery Level Support Data
3.2.1 Delivery Index (README) Contents
The Delivery Index contains a list of names of the product files and the ISD files, alongwith copyright information for the entire product delivery. The Delivery Index is found ina Top Level README file and a Top Level XML file delivered with each delivery, andeach describes all of the files for all of the products delivered within that delivery. TheREADME file and the XML file contain the same information. The Top Level READMEFile is named for the 12 digit DigitalGlobe Order Item number and the 2 digit deliveryincrement, for example: 000000077583_01_README.TXT and000000077583_01_README.XML.
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Table 2. Top Level Delivery Index (README) Contents (ISDF.DEL.README)
Field Field Name/Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions/
Comments
version Version of the ISD. 20.0 to 99.9
copyrightText Copyright and restricted usetext.
Use, duplication or disclosure bythe government is subject to therestrictions as set forth insubparagraph (c)(1)(ii) of the Rightsin Technical Data and ComputerSoftware Clause contained inD.F.A.R.S. 252.227-7013, andsubparagraphs (c)(1) and (2) of theCommercial Computer Software-Restricted Rights contained in 48C.F.R. 52.227-19.Contractor/manufacturer is
DigitalGlobe, Incorporated at 1601Dry Creek Drive, Suite 260,Longmont, CO 80503-6493.Copyright YYYY DigitalGlobeIncorporated, Longmont CO USA80503-6493 DigitalGlobe and theDigitalGlobe logo are trademarks ofDigitalGlobe, Incorporated. The useand/or dissemination of this dataand/or of any product in any wayderived there from are restricted.Unauthorized use and/ordissemination is prohibited.DigitalGlobe WWW Reference:http://www.digitalglobe.com
2nd paragraph
Copyright YYYYDigitalGlobe ...
Where yyyy is thecurrent year
mediaCreationD
ate
Time of media creation. YYYY-MM-DDThh:mm:ss.dddZ The time in this tag only
has precision to 3decimal places.
orderNumber 12 digit DigitalGlobe OrderItem number, underscore,and 2-digit deliveryincrement.
nnnnnnnnnnnn_mm
Example:
052265559010_01
fileList A list of all files in the deliveryincluding path directories.
Lists allfilenames included:
GIS files;
Metadata files;
Product files;
etc.
This field will varydepending on producttype.
areaDesc Customer supplieddescription of order. Null ifno information supplied by
the customer.
Example:
IS_05
dgOrderNo DigitalGlobe Order Number. Example:
052265559
dgOrderItemNo 12-digit DigitalGlobe OrderItem Number.
Example:
05226559010
custOrderNo Customer supplied ordernumber. Null if noinformation supplied by thecustomer.
Example:
IS_05
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Field Field Name/Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions/Comments
custOrderItemNo
Customer supplied order itemnumber. Null if noinformation supplied by thecustomer.
40005
collectionStart Date of first imageacquisition.
YYYY-MM-DDThh:mm:ss.ddddddZ
collectionStop Date of final imageacquisition.
YYYY-MM-DDThh:mm:ss.ddddddZ
countryCode Two letter country code ofcenter point of order polygon.
Example:
Required for PMAAorders
productScale The NMAS mapping scale ofOrthorectified Products.
1:50,000 for Level 3A
1:25,000 for Level 3B
1:24,000 for Level 3C
1:12,000 for Level 3D1:10,000 for Level 3E
1:5,000 for Level 3F
1:4,800 for Level 3G
1:2,400 for Level 3H
Custom for Level 3X
Only applicable to Level3 products.
numberOfLooks Indicates whether this is asingle product, a stereo pairor a stereo triplet.
1 for single,
2 for stereo pair,
3 for stereo triplet
cloudCover Estimate of the max cloud-covered fraction of thedelivery. For mosaicproducts, this calculation isbased on the intersection ofthe polygons contained in theMOSAIC_CLOSEDPOLYGONS shapefile with the cloudpolygons associated with thatpart of the relevent inputimagery.
See Section 3.2.2.5 for moreinformation.
[See Exception 1]
0.000 to 1.000
-999.0 for Metadata-Only;
Precision:
3 decimal places
Not applicable forMetadata Only.
-999.0 if not assessed
nwLat Latitude of NW corner of theminimum bounding rectangle(MBR) of the order polygon.
Range:
90.00000000
Precision:
8 decimal places
nwLong Longitude of NW corner ofthe minimum boundingrectangle (MBR) of the orderpolygon.
Range:
180.00000000
Precision:
8 decimal places
seLat Latitude of SE corner of theminimum bounding rectangle(MBR) of the order polygon.
Range:
90.00000000
Precision:
8 decimal places
seLong Longitude of SE corner of the Range:
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Field Field Name/Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions/Comments
minimum bounding rectangle(MBR) of the order polygon. 180.00000000Precision:
8 decimal places
3.2.2 Delivery Layout File
The Layout file illustrates the following: outline of the Product area (order polygon),
outline of the Product Component areas (product polygon);
the distribution of the above areas on the delivery media.
It is an image file in JPEG format, without any additional attributes. The information
contained in this file is not duplicated in the Top Level XML file.
3.2.3 Delivery Geographic Location Map Files
Geographic Location Map files are similar to the layout file (Section 3.2) but in Shapefileformat, projected to WGS84 Geographic (Lat/Lon). These product shapefiles aredelivered as read/writable ASCII text files.DigitalGlobe provides the following Geographic Location Map files with every delivery:
Strip or Substrip Area which shows the vertices and boundaries of the strips orsubstrips used to generate the product, as well as the catalog ID for each of theseareas.
An example of a Strip or Substrip Area filename is:
052265559010_01_STRIP_SHAPE.dbf
Product Area which shows the vertices and boundaries of the complete productas ordered by the customer.
An example of a Product Area filename is:
052265559010_01_ORDER_SHAPE.dbf
Product Component Areas which shows the vertices and boundaries of theproduct components that make up the delivery, and the allocation of the productcomponents to media.
An example of a Product Component Area filename is:
052265559010_01_PRODUCT_SHAPE.dbf Product Subcomponent Areas which shows the vertices, boundaries, name,
and filename of each tile or sub-strip in the product components, as well as theproduct component to which each belongs. A TILE shapefile will not be includedwith Level 0 nor Metadata-Only products.
An example of a Product Subcomponent Area filename is:
052265559010_01_TILE_SHAPE.dbf
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Product Pixel Area which shows the vertices and boundaries of actualimagery pixels of the product components that make up the delivery (non-blackfill pixels.) In the Product Pixel area shapefile, the is pre-pended by an acquisition date-time of one of the contributing raw imagesalong with a mnemonic that describes the product level as in the followingexample:
08JUL30153254-P2AS-052265559010_01_P001_PIXEL_SHAPE.dbfFor ortho-mosaic products, DigitalGlobe delivers an additional Geographic LocationMap file for each product:
Mosaic seamlines which shows the vertices and boundaries of eachimage strip that contributed to the generation of the mosaic. Note: Thisshapefile contains all MDA Product Processor manual, auto-generated, andmanually edited seamlines. If the product is exported to another application
where changes are made to the seamlines, this shapfile will not reflectthose changes. The Mosaic seamline has the DG orderspart ID (eg P001) pre-pended as in the following example:
052270931010_01_P001_MOSAIC_CLOSEDPOLYGONS_SHAPE.dbf
Table 3. Delivery Shapefile Names and Attributes
ShapefileName
Field Field Name / Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions /Comments
STRIP
stripDesc Catalog ID corresponding withassociated strip or substrip
10100100017C2400
sunAzimuth Azimuth angle of the sun measuredfrom north clockwise, in degrees, atthe time the strip or substrip wasacquired
Range:0.0 360.0
Note:Decimalprecision mayvary.
offNadir The spacecraft elevation anglemeasured from nadir to the imagecenter as seen from the spacecraftat the time the strip or substrip wasacquired
Range: 0.0
Note:
Decimalprecision mayvary.
acquisitio Populated with the strip acquisitiondate-time
Example:2002-12-29T15:58:08.626765Z
orderDesc Item number corresponding withassociated order polygon
Example:052265559010
This is theSOLI number:
custOrd Optional order number supplied bythe customer at time of orderplacement.
Example:
IS_46
Only ifcustomer has
supplied ordernumber.
custOrdItm Optional order item numbersupplied by the customer at time oforder placement.
Example:
40005
Only ifcustomer hassupplied orderitem.
datum The Datum in which the productwas ordered.
WE
NAR
NAS
TOYM
Blank forMetadata-Only,Level 0, andLevel 1products.
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ShapefileName
Field Field Name / Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions /Comments
Order
projection The projection in which the productwas ordered. NA for Basicproducts.
EpipolarUTM
State Plane Coordinates
Japan RCS Coordinates
Lambert Conformal Conic
Transverse Mercator
Geographic (Lat/Long)
Blank forMetadata-Only,Level 0, andLevel 1products.
createDate Start date of product creation. YYYY-MM-DDThh:mm:ss.ddddddZ
Tile
tileName Tile Name If R or C 9: RnCn
If R or C 99: RnnCnn
If R or C 999: RnnnCnnn
Examples:R1C1R19C3
olumns do nothave to be ofthe same orderof magnitude.
e:
osaic with 6columns and15 rows wouldbe displayedas:
e image file.
1236-M2AS_R1C1-000000092184_01_P001.NTF
prodDesc Unique product identifier Example:P001
volNum Volume number of the media onwhich the tile is located.
Example:Vol. 1
PRODUCT
prodDesc Unique product identifier Example:P001
volNum Volume number of the media onwhich the tile is located.
Example:Vol. 1-2
bandInfo Defines type of spectral bands inproduct. (PanSharp, Multispectral,All Band, Panchromatic)
PanSharpMultispectralAll BandPanchromatic
PIXEL
prodDesc Unique product identifier Example:3AUG27021804-M2AS-005357007010_01_P001_PIXEL_SHAPE
volNum Volume number of the media onwhich the tile is located.
Example:Vol. 1-2
MOSAIC_CLOSEDPOLYGONS
imageIdStr Imagery identifier Example:10100100012BEA00
acqDate Imagery acquisition date YYYY-MM-DDThh:mm:ss.ddddddZ
gsd Ground sample distance in meters Range:0.46000 10.00000
Precision:5 decimal places
horError Requested product accuracy fromthe order
Range:0.00000 15.44000
Precision:5 decimal places
cloudCover Cloud cover percentage iscalculated by intersecting the
Range:0.00000 to 100.00000
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ShapefileName
Field Field Name / Description Format Range / Value
[DG Range / Value, if differentfrom Format Range / Value]
Conditions /Comments
closed polygon with cloud polygonsfrom the underlying image strips.See Section 3.2.2.5 for moreinformation.
Precision:5 decimal places
offNadir Angle from s/c to strip crosstractcenter.
Range:0.00000 30.00000
Precision:5 decimal places
Can beexceeded withreduced imagequality.
scanAz Image scan azimuth. North-to-SouthEast-to-West
scanDir Image scan direction. ForwardReverse
collectAz The orientation angle of thegenerated collection strip relative totrue north.
Range:0.00000 360.00000
Precision:5 decimal places
collectEl The collection elevation is the anglebetween the horizontal and the rayoriginating from the optical center tothe point of incidence.
Range:0.00000 90.00000
Precision:5 decimal places
sunAz Sun azimuth. Range:0.00000 360.00000
Precision:5 decimal places
sunEl Sun elevation. Range:0.00000 90.00000
Precision:5 decimal places
satellite Satellite mnemonic QB02, WV01, WV02, WV03
prodDate Production generation date YYYYMMDD
currDate Production generation date YYYYMMDD
collDate Date of image collection YYYYMMDD
absAcc Product absolute accuracy. Range:0.00000 100.00000Precision:5 decimal places
absAccUnit Absolute accuracy units Meters
relAcc Product relative accuracy Range:0.00000 5.00000Precision:5 decimal places
relAccUnit Relative accuracy units Meters
3.3 Product Component-Level Support Data
3.3.1 Product Component Index (README)
The Product Component Index lists the names of the image, browse, and ISD files ineach product component subdirectory of a delivery. Other ISD files may or may not be
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included in a delivery depending on the type of the products in the order. One ProductComponent Index is provided for each product component of each delivery within theproduct component subdirectory.
Table 4. Product Component Index (README) Contents
Field Field Name / Description Conditions / Comments
copyrightText Copyright and restricted use text
version Version of the ISD
intro Introduction. General textual information aboutthe product and file contents.
BEGIN_GROUP = PRODUCT_1
XMLFilename Product Component XML file
licenseTxtFilename
Licensing text file name Predicated on license order parameter.
IMFFilename Image metadata file name
NRDFilename Non-responsive detector file name Only for Metadata-Only, Level 0, and Level 1Aproducts.
radFilename Radiometric calibration file name Only for Metadata-Only, Level 0, and Level 1Aproducts.
ephemFilename Ephemeris file name Only for Metadata-Only, Level 0, Level 1A and Level1B products.
attFilename Attitude file name Only for Metadata-Only, Level 0, Level 1A and Level1B products.
tilFilename Tile map file name Not applicable to Level 0 files.
geoCalFilename Geometric calibration file name Only for Metadata-Only, Level 0, Level 1A and Level1B products.
stereoFilename Stereo file name Only valid for stereo products
RPC00BFilename
RPC00B file name Not applicable to Level 3 products.
END_GROUP = PRODUCT_1
END;
3.3.2 Image Metadata
3.3.2.1 Image Metadata Content
For ortho-mosaics, if an input image is not used as part of the final product, it will not berepresented in the Image Metadata Data (IMD). All other input images will be
represented in the IMD and will appear in order of their acquisition date-timestamp withthe oldest image appearing first. The date-timestamp of the oldest image will be used aspart of the product filenames.The Image Metadata specifies the basic characteristics of an image or a DEM asspecified in the following table.
Table 5. Image Metadata Contents
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
version Version of the ISD 20.0 to 99.9
generationTime Time of file generation. YYYY-MM-DDThh:mm:ss.ddddddZ
productOrderId Order Item ID of product Example:
052270730010_01_P001
Optional if product does notoriginate from DG or co-producer
productCatalogID ID for the corresponding record inDGs catalog (In multi-set productsthis would be the group catalog id)
Examples:
903001004AA74B00
None
None if catalog not kept inDG archive.
childCatalogID ID for the corresponding record inDGs catalog (for multi-set productsthis would be the child or subsetcatalog id) In cases where children
products do not have separate IMDfiles, this field may be repeated.
Example:
210001004AA74C00
None
Used only with multi-setproducts
imageDescriptor This is a combination of product nameand product type
"Level0", "Metadata", "Basic1A","Basic1B", "Standard2A","ORStandard2A","OrthoRectified3", "Stereo1B",StereoOR2A,"DEM4
productScale This is the NMAS mapping scale ofthe Orthorectified Product
1:50,000 for 3A
1:25,000 for 3B
1:24,000 for 3C
1:12,000 for 3D
1:10,000 for 3E
1:5,000 for 3F
1:4,800 for 3G1:2,500 for 3H
1:2,400 for 3I
Custom for 3X
Only applicable to Level 3products.
productAccuracy Identifies the worst case CE90% inmeters for the associatedproductScale.
25.40 for 3A
12.70 for 3B
12.19 for 3C
10.16 for 3D
8.47 for 3E
4.23 for 3F
4.06 for 3G
2.03 for 3H
1.02 for 3I
unavailable
Only applicable to Level 3products.
RMSE2D The Two Dimensional Root MeanSquare Error
15.44 for Level 3A;
7.72 for Level 3B;
7.41 for Level 3C;
6.18 for Level 3D
5.15 for Level 3E
2.57 for Level 3F
2.47 for Level 3G
1.29 for Level 3H
Only applicable for Level 3products.
Level 3X uses customersupplied data, e.g. DEM(s),GCPs or both, so DG doesnot guarantee accuracy.
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
1.24 for Level 3I;
0.00 for Level 3X;
Precision:
2 decimal places
bandId Identifies the spectral band.
P = Panchromatic, Multi = all Multi-spectral bands (4 for QB and 8 forWV02), N = NearIR, R = Red, G= Green, B = Blue, "RGB" = Red +Green + Blue, "NRG" = Near-IR + Red+ Green, BGRN = Blue + Green +Red + Near-IR. RGB, NRG, andBGRN are pan-sharpened colorimages, stored at the panchromatic
spatial resolution. For a DEM, thisfield indicates the spectral band (Pan)used to create the product.
For WV02 there are also the followingbands, N2=NIR2, RE=Red Edge,Y=Yellow, C=Coastal
P
Multi
N
R
G
B
RGB
NRG
BGRN
N2
RE
Y
C
RGC
RYC
RYB
MS1
MS2
N2, RE, Y and C in any bandcombination are available forWV02 only
panSharpenAlgorithm
Identifies the algorithm used to createpan-sharpened products:HIS = Hue, Intensity, Saturation
PCA = Principal Component AnalysisDG = DigitalGlobe WaveletUNB = University of New Brunswick
HIS
WAV
PCAUNBDGNone
numRows Number of rows. 1 N
numColumns Number of columns. 1 N
productLevel Product level that indicates theradiometric and geometric correctionsfor backward compatibility with QBconventions in terms of Product Type.
Metadata, LV0, LV1A,LV1B, LV2A, LV3A, LV3B,LV3C, LV3D, LV3E, LV3F,LV3G, LV3X, LV4A, LV3H,LV3I, LV4,Stereo 1B, Stereo 2A, StereoOR2A
Refer toTable 14. ProductLevel to Product TypeRelationships for adefinition of Product Levels.
productType Product type Metadata, Raw, Cal/Val,Basic, Stereo, Standard,
Ortho, DEM
numberOfLooks Indicates whether this is a singleproduct, a stereo pair or a stereotriplet
1 for Non-Stereo,
2 for Stereo Pair,
3 for Stereo Triplet
radiometricLevel Options for radiometric correction. RawCorrected
Not applicable for a DEMproduct
Products 1B and above willall be Corrected.
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
radiometricEnhancement
Option for Color Correction andContrast Enhancement
DRA/ColorDRA/ContrastOff
Standard, Stereo EpipolarStereo OR2A,, andOrthorectified Products only
bitsPerPixel The number of bits per pixel in theproduct image files. If the product iscompressed, this value is the originalbits per pixel, before compression.This value will be either 8, 11, or 16,depending on the product. Note thatthis is the number of bits stored in theimage file for each pixel value asopposed to the number of significantbits that define the pixel brightnessvalue (i.e., for a product which isdelivered as 16 bits per pixel, only 11
bits define the brightness value ofeach pixel).
For Raw products, this indicates thenumber of bits per pixel beforecompression or after decompression.
8,
11,
16
This field will not be includedin Metadata products.
11 bits per pixel applies toLevel 0 products only.
restrictedAreaIntersect
Portions of the strip intersecting therestricted area have been modified tomeet the allowable GSD
Yes This field will only beincluded if the strip intersectsthe restricted area and hasbeen modified to meet theallowable GSD.
compressionType The type of compression, if any,applied to the product imagery.
None,
JPEG2000,
Downlink
MrSID
MG2
MG3
This field will not be includedin Metadata products.
Downlink compression
applies to Raw products only.MG2 and MG3compression applies toMrSID formatted products.
jpegProfileName Name of the DigitalGlobe JPEG2000profile applied.
See Error! Bookmark not defined.for comprehinsive range of values.
Included only when thecompression type isJPEG2000.
BEGIN_GROUP = BAND_b
ULLon Geodetic longitude of the upper leftpixel of the image.
Range:
180.00000000
Precision:
8 decimal places
ULLat Geodetic latitude of the upper left pixelof the image.
Range:
90.00000000Precision:
8 decimal places
ULHAE Height above the ellipse of the upperleft pixel of the image.
Precision:
2 decimal places
URLon Geodetic longitude of the upper rightpixel of the image.
Range:
180.00000000
Precision:
8 decimal places
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
URLat Geodetic latitude of the upper rightpixel of the image.
Range:
90.00000000
Precision:
8 decimal places
URHAE Height above the ellipse of the upperright pixel of the image.
Precision:
2 decimal places
LRLon Geodetic longitude of the lower rightpixel of the image.
Range:
180.00000000
Precision:
8 decimal places
LRLat Geodetic latitude of the lower rightpixel of the image.
Range:
90.00000000Precision:
8 decimal places
LRHAE Height above the ellipse of the lowerright pixel of the image.
Precision:
2 decimal places
LLLon Geodetic longitude of the lower leftpixel of the image.
Range:
180.00000000
Precision:
8 decimal places
LLLat Geodetic latitude of the lower left pixelof the image.
Range:
90.00000000
Precision:
8 decimal places
LLHAE Height above the ellipse of the lowerleft pixel of the image.
Precision:
2 decimal places
absCalFactor The conversion factor, KnTDI, thatconverts the relative radiance valuesin an image file into correspondingabsolute radiance, measured inwatts/sq m/ster. (This is calibrated
6000 K blackbody radiance,integrated over the appropriatespectral window)
Example:
6.447600e-02
-999 = None whenradiometricEnhancement =DRA.
effectiveBandwidth
The effective bandwidth is associatedwith the absCalFactor and it's value isrequired to calculate top-of-
atmosphere spectral radiance.
0.0000 to 1.0000 scientificnotation
TDILevel Level of the time-delayed integration,as commanded to the spacecraft.
Values:
PAN:
6, 10, 13, 16, 18, 24, 32, 48, 56,64
MS:
1, 3, 6, 10, 14, 18, 21, 24
1 only valid for QB02 MSimage.
See Error! Bookmark notdefined. for list of TDI Levelsfor each spacecraft andband.
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
END_GROUP = BAND_b
outputFormat External product format. GeoTIFF,TIFF, and NITF are image formats forBasic, Stereo, Standard andOrthorectified products, CIB is animage format for orthorectified1:24,000 and 1:12,000, while DTED,USGS DEM, and ASCII DTM aredigital elevation model formats forDEM products.
GeoTIFF
TIFF
NITF20
NITF21
NITF21NCDRD
CIB
DTED
USGS DEM
ASCII DTM
J2K
GeoJP2
GeoPDF
MrSID
RPF
KIP
Not applicable for Metadata-Only Products
BEGIN_GROUP = IMAGE_n
satId Satellite Id. QB02, WV01, WV02, WV03
mode Sensor Mode FullSwath, CenterSwath Only FullSwath forQuickBird
scanDirection Sensor scan direction Forward, Reverse Only Forward for QuickBird
CatId DigitalGlobe catalog Id for the rawdata used in this product.
For mosaics, only strips used in the
mosaic creation should be listed. Thecatalog ids are ordered from earliestaquisition to latest.
Example:
1020010007AF7100
For each sub-strip or areabased product
TLCTime Absolute time of the first time-taggedline count record, used in the productcomponent.
YYYY-MM-DDThh:mm:ss.ddddddZ
Only for Metadata, Level 0,Level1A, and Level 1Bproducts
numTLC Number of time-tagged line countrecords in the TLCList used in theproduct component.
Range:
1
Only for Metadata, Level 0,Level1A, and Level 1Bproducts
TLCList List of time-tagged line count (TLC)records. Each TLC record consists of
lineNumber (Short)
timeOffset (Float)
lineNumber is the image line number
for a line in the product component.This number will be negative if theTLC record precedes the productcomponent.
timeOffset is the recorded time tag forthis line, in seconds after TLCTime.
The timeOffset will be negative if theimage is in the reverse scan direction.
Example:
(
(-256, 0.000000) ,
(768, 0.148404), ...
(N, N.nnnnnn)
)
Precision:
TLCTime will have 6 decimalplaces precision.
Only for Metadata, Level 0,Level1A, and Level 1Bproducts
firstLineTime Exposure time for the first line in thestrip used for the product component.
YYYY-MM-DDThh:mm:ss.ddddddZ
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
avgLineRate Average number of image linesexposed per second
See Error! Bookmark not defined.for actual Line Rates. Value mayvary somewhat from these values.
Precision:
2 decimal places
For Pan Sharpened products,this will be equal to theaverage MS line rate.
exposureDuration Duration of the exposure interval foreach line.
Value:
1/avgLineRate
Precision:
8 decimal places
Precision may not run to 8 ifthere are trailing zeroes.
minCollectedRowGSD
Minimum original collected GSD of theproduct in the row direction.
Range:
0.460 5.490
Precision:
3 decimal places
The Pan GSD is used forPanchromatic and Pan-sharpened products; the MSGSD is used for MSproducts.
These value ranges arebased on 0 to 45 degrees off
nadir for all sensors.
maxCollectedRowGSD
Maximum original collected GSD ofthe product in the row direction.
Range:
0.460 5.490
Precision:
3 decimal places
meanCollectedRowGSD
Mean original collected GSD of theproduct in the row direction.
Range:
0.460 5.490
Precision:
3 decimal places
minCollectedColGSD
Minimum original collected GSD of theproduct in the column direction.
Range:
0.460 5.490
Precision:
3 decimal places
maxCollectedColGSD
Maximum original collected GSD ofthe product in the column direction.
Range:
0.460 5.490
Precision:
3 decimal places
meanCollectedColGSD
Mean original collected GSD of theproduct in the column direction.
Range:
0.460 5.490
Precision:
3 decimal places
meanCollectedGSD
Mean GSD of the original, collectedrow and column GSD.
Range:
0.460 5.490
Precision:
3 decimal placesmeanProductRowGSD
Mean GSD of the product in the rowdirection
Range:
0.460 10.000
Precision:
3 decimal places
Applicable to Level 1Bproducts only
meanProductColGSD
Mean GSD of the product in thecolumn direction
Range:
0.460 10.000
Precision:
3 decimal places
Applicable to Level 1Bproducts only
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
meanProductGSD
Mean GSD of the product row andcolumn GSD
Range:
0.460 10.000
Precision:
3 decimal places
Applicable to Level 1Bproducts only
rowUncertainty Mean position uncertainty in line andpixel directions. These are 3-sigma,one-dimensional values.
Precision:
2 decimal places
colUncertainty Mean position uncertainty in line andpixel directions These are 3-sigma,one-dimensional values.
Precision:
2 decimal places
minSunAz Minimum azimuth angle of the sunmeasured from north clockwise.
Range:
0.0 to 360.0
Precision:One decimal place
maxSunAz Maximum azimuth angle of the sunmeasured from north clockwise.
Range:
0.0 to 360.0
Precision:
One decimal place
meanSunAz Mean azimuth angle of the sunmeasured from north clockwise.
Range:
0.0 to 360.0
Precision:
One decimal place
minSunEl Minimum elevation angle of the sunfrom horizontal.
Range:
90.0
Precision:One decimal point
maxSunEl Maximum elevation angle of the sunfrom horizontal.
Range:
90.0
Precision:
One decimal point
meanSunEl Mean elevation angle of the sun fromhorizontal.
Range:
90.0
Precision:
One decimal point
minSatAz Minimum azimuth angle of the satellitewith respect to the center line, indegrees.
Range:
0.0 to 360.0
Precision:One decimal point
maxSatAz Maximum azimuth angle of thesatellite with respect to the center line.
Range:
0.0 to 360.0
Precision:
One decimal point
meanSatAz Mean azimuth angle of the satellitewith respect to the center line.
Range:
0.0 to 360.0
Precision:
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
One decimal point
minSatEl Minimum elevation angle of thesatellite with respect to the center line.
Range:
90.0
Precision:
One decimal point
maxSatEl Maximum elevation angle of thesatellite with respect to the center line.
Range:
90.0
Precision:
One decimal point
meanSatEl Mean elevation angle of the satellitewith respect to the center line.
Range:
90.0
Precision:One decimal point
minInTrackViewAngle
Minimum dihedral angle measured atthe spacecraft from the nominalspacecraft YZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraftY-axis. A positive angle indicates thesensor is looking forward.
Range:
90.0
Precision:
One decimal place
maxInTrackViewAngle
Maximum dihedral angle measured atthe spacecraft from the nominalspacecraft YZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraftY-axis. A positive angle indicates thesensor is looking forward.
Range:
90.0
Precision:
One decimal place
meanInTrackViewAngle
Mean dihedral angle measured at thespacecraft from the nominalspacecraft YZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraftY-axis. A positive angle indicates thesensor is looking forward.
Range:
90.0
Precision:
One decimal place
minCrossTrackViewAngle
Minimum dihedral angle measured atthe spacecraft from the nominalspacecraft XZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraftX-axis. A positive angle indicates thesensor is looking to the right.
Range:
90.0
Precision:
One decimal place
maxCrossTrackViewAngle
Maximum dihedral angle measured atthe spacecraft from the nominalspacecraft XZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraftX-axis. A positive angle indicates thesensor is looking to the right.
Range:
90.0
Precision:
One decimal place
meanCrossTrackViewAngle
Mean dihedral angle measured at thespacecraft from the nominalspacecraft XZ plane to the plane thatcontains the ground projection of theproduct center-line and the spacecraft
Range:
90.0
Precision:
One decimal place
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
X-axis. A positive angle indicates thesensor is looking to the right.
minOffNadirViewAngle
The minimum spacecraft elevationangle measured from nadir to theproduct center-line as seen from thespacecraft.
Range:
0.0 to 90.0
Precision:
One decimal place
maxOffNadirViewAngle
The maximum spacecraft elevationangle measured from nadir to theproduct center-line as seen from thespacecraft.
Range:
0.0 to 90.0
Precision:
One decimal place
meanOffNadirViewAngle
The mean spacecraft elevation anglemeasured from nadir to the product
center-line as seen from thespacecraft.
Range:
0.0 to 90.0
Precision:
One decimal place
PNIIRS Mean predicted image quality on theNational Imagery InterpretabilityRating Scale (NIIRS), as computed bythe General Image Quality Equation(GIQE).
0.0 to 9.0 Not applicable for Metadata-Only or Raw Products
cloudCover Estimate of the max cloud-coveredfraction of the product component. .For mosaic products, this calculationis based on the intersection of thepolygons contained in theMOSAIC_CLOSEDPOLYGONSshapefile with the cloud polygonsassociated with that part of the
relevent input imagery.See Section 3.2.2.5 for moreinformation.
[See Exception 1]
0.000 to 1.000
-999.000
Not applicable for Metadata-Only
-999.000 if not assessed
resamplingKernel Method used to resample the image.NULL=no resampling kernel,NN=nearest neighbor, BL=bilinear,CC=cubic convolution,DS8=8 point sinc,DS16=16 point sinc,K16=16 pointed Kaiser sinc,MTF=Modulation Transfer Function,PS=Pan sharpening.ENH=Enhanced (Boost) kernelUserDefined
NULL
NN
BL
CC
DS8
DS16
K16
MTF
PS
ENH
UserDefined
Only valid when doingradiometric correction.
"NN"; "Bilinear"; "CC";"8pointSinc";
"8point Sinc"; "16pointSinc";"16 point Sinc";
"Kaiser16pointSinc"; "Kaiser16 point Sinc";
"MTF";
"PS"; "ENH"
calParam1Time Absolute time associated with the firstrecord in the calParam1List.
YYYY-MM-DDThh:mm:ss.ddddddZ
Only for Metadata-Only,Level 0, and Level 1Aproducts
numCalParam1 Number of (value, time) records in thecalParam1List
Range:
1
Only for Metadata-Only,Level 0, and Level 1Aproducts
calParam1List List of time-tagged calibration Range: Only for Metadata-Only,
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
parameter records. Each recordconsists of:
value (Float)
timeOffset(Float)
The value field is used in radiometriccalibration. timeOffset is the timeassociated with this value, in seconds,relative to calParam1Time.
There will be numCalParam1elements in the list.
For timeOffset:
0.000000
Precision:
Six decimal places for bothentries.
Example:
(
(17.838462, 0.000000),
(17.838543, 1.001259),...
(N.nnnnnn, N.nnnnnn) )
Level 0, and Level 1Aproducts.
positionKnowledgeSrc
Source of knowledge of the satelliteposition. R = Refined
R
attitudeKnowledgeSrc
Source of knowledge of the satelliteattitude. R = Refined
R
revNumber Orbit revolution number at the time ofexposure.
Range:
1 to 99999
END_GROUP = IMAGE_n
BEGIN_GROUP = MAP_PROJECTED_PRODUCT
Only for map-projected(LV2A, LV3 and DEM) StereoEpipolar, and Stereo OR2Aproducts.
earliestAcqTime Acquisition time (UTC) of the first lineof the earliest image contained in theproduct component.
YYYY-MM-DDThh:mm:ss.ddddddZ
latestAcqTime Acquisition time (UTC) of the first line
of the latest image contained in theproduct component.
YYYY-MM-
DDThh:mm:ss.ddddddZ
For a single image product
this value will be the same asearliestAcqTime
datumName Name of the datum specified for themap projection when the product wasordered.
WE for WGS84
GRS80 for GRS 80
NAR for NAD83
NAS for NAD27
TOKYO Mean Solution forTokyo-Mean
NAD83 uses a GRS 80ellipsoid.
NAD27 uses a Clarke 1866ellipsoid.
Tokyo-Mean uses a Bessel1841 ellipsoid.
semiMajorAxis Length of semi-major axis of thedatum ellipsoid, in meters.
Value:
6378137.0000 for WGS84
6378137.0000 for NAD83 andGRS 80
6378206.4000 for NAD27
6377397.1550 for Tokyo-MPrecision:
4 decimal places
inverseFlattening Inverse flattening of the datumellipsoid, 1/f. Some usefulrelationships between flattening (f),semi-major axis (a), semi-minor axis(b), and eccentricity squared (e2) are:
f = (a - b) / a
e2
= (a2
- b2) / a
2
298.257223563 for WGS84
298.257222101 for NAD83
294.978698200 for NAD27
299.152812800 for Tokyo-M
Precision:
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
= 2f - f2
b = a (1 - f)
9 decimal places
datumOffset X, Y, Z offset of the center of thereference ellipsoid relative to theorigin of the WGS 84 system.
For WGS84 & NAD83:
( 0.000,
0.000,
0.000 );
For NAD27:
( -8.000,
160.000,
176.000 );
For Tokyo-Mean:
( -128.000,
481.000
664.000 )
Precision:
3 decimal places.
mapProjName Name of the map projection specifiedwhen the product was ordered.
Epipolar
UTM
State Plane Coordinates
Japan RCS Zone xx
Lambert Conformal Conic
Transverse Mercator
Geographic (Lat/Long)
Epipolar only available forStereo 2A products.
For Japan RCS Zone, validzone number range from 1 to19.
mapProjCode Integer code for the map projection
that was used. This is an index intothe table of generalized projections inReference 6.
1 for UTM
2 for State Plane Coordinates
4 for Lamber Conformal Conic
9 for Transverse Mercator
17 for Geographic (Lat/Long)
Not applicable to Epipolar
products.
mapZone Zone used for the map projection. For UTM:
1 to 60
For State Plane:
0101 5105
Only for UTM and StatePlane projections.
State Plane must have allfour digits present.
mapHemi Code indicating the hemisphere usedfor the map projection.
N;
S
Only for UTM projection
mapProjParam A list of 15 parameters that describe
the particular map projection. Themeaning of each parameter dependson the map projection selected inmapProjCode.
Precision:
9 decimal places
Not applicable to Epipolar
products.
productUnits Units of projected product DD = Decimal Degrees
M = Meters
F = Feet
USF = US Survey Feet
Always meters for Epipolar.
originX Easting of the center of the upper leftpixel of the image.
Precision:
8 decimal places
This is equal to ULX unlessan origin is specified by the
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
customer.
originY Northing of the center of the upper leftpixel of the image.
Precision:
8 decimal places
This is equal to ULY unlessan origin is specified by thecustomer.
orientationAngle Azimuth angle measured clockwisefrom map north to the up direction atthe center of the image. This is arotation between raster image and themap coordinate systems. Since map-projected products are always Map-North up, this is always zero.
0.0
colSpacing GSD of the image in the columndirection.
colSpacing = 2 decimal places fornon-geographic projectedproducts
colSpacing = scientific notation forgeographic projected products
Not applicable to DEMs
rowSpacing GSD of the image in the row direction. rowSpacing = 2 decimal places fornon-geographic projectedproducts
rowSpacing = scientific notationfor geographic projected products
Not applicable to DEMs
productGSD GSD of the product. Range:
0.46 2.44
Precision:
2 decimal places
Level 2A and higher productsonly.
The GSD of a MultiSpectralimage needs to equal 4x theGSD of the PAN image. e.g.If the productGSD of a PANimage is 0.50, then theproductGSD of the
MultiSpectral image will be2.00
edgeMatch Indication of the use of edge matchingfor orthomosaic products, i.e. bundleadjusted.
On
Off
Orthorectified products only
colorBalance Indication of the use of color balancefor ortho mosaic products.
On
Off
Orthorectified products only
postSpacing Post spacing on the DEM, in m. Precision:
2 decimal places
Only applicable to DEMs
ULX Easting of the upper left pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
This value will be equal toorignX.
ULY Northing of the upper left pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:8 decimal places
This value will be equal tooriginY.
ULH Height above the ellipsoid of the upperleft pixel of the image in the specifieddatum and map projection. Includesblackfill.
Precision:
2 decimal places
URX Easting of the upper right pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
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Field Field Name / Description Format Range / Value
[DG Range / Value, if different
from Format Range / Value]
Conditions / Comments
URY Northing of the upper right pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
URH Height above the ellipsoid of the upperright pixel of the image in the specifieddatum and map projection. Includesblackfill.
Precision:
2 decimal places
LRX Easting of the lower right pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision;
8 decimal places
LRY Northing of the lower right pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
LRH Height above the ellipsoid of the lowerright pixel of the image in the specifieddatum and map projection. Includesblackfill.
Precision:
2 decimal places
LLX Easting of the lower left pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
LLY Northing of the lower left pixel of theimage in the specified datum and mapprojection. Includes blackfill.
Precision:
8 decimal places
LLH Height above the ellipsoid of the lowerleft pixel of the image in the specifieddatum and map projection. Includesblackfill.
Precision:
2 decimal places
horizontalAccurac
y
Accuracy in location position on
finished DEM product. (1.6 sigma,90% circular error)
0.0 to 200.0 DEM Products only
verticalAccuracy Accuracy of elevation determinationon finished DEM product. (1.6 sigma,90% linear error)
0.0 to 200.0 DEM Products only
DEMCorrection Level of the DEM used for the terraincorrection.
"none"
"Base Elevation"
"Coarse DEM"
"Fine DEM"
Customer Supplied DEM
DTED1 DTED2 DTED3DTED4 DTED5 DTED6
Not applicable to DEMs.
Stereo OR2A and StandardOR2A Products use onlyBase Elevation.
Standard and OrthorectifiedProducts use anything exceptnone.
All other products use none.
terrainHAE The constant value of the heightabove the ellipsoid that was used forthe terrain correction, in meters.
Range:
0
Only when DEMCorrection ="Base Elevation".
numGCP Number of ground control points usedto create this product.
Range:
0
END_GROUP = MAP_PROJECTED_PRODUCT
END;
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3.3.3 Product Browse file
The product browse file is a compressed JPEG file of the delivered product. The productbrowse file will be consistent with the bands ordered for the final product, except formultispectral and 4-band pan-sharpened products for which natural color browse imagery will besupplied. Figure 12 is sample of a natural color-product browse file.
Figure 2. Sample Product Browse File
3.3.4 Tile Map
Large images are tiled into sub-images and distributed as a group of sub-image files,called tiles. Tiles are not uniform in size. If the image does not fill the whole tile, blackfillwill be added to the top and left of the imagery, but removed from the bottom and rightof the imagery in order to maintain a uniform upper left pixel and reduce tile sizes.
Blackfill will only be present in the upper left corner of a product if a tiling origin isspecified that does not correspond to the upper left corner of the Minimum BoundingRectangle of the order polygon. If no tiling origin is specified, the upper left corner ofthe order poly will be the tiling origin by default. This section describes the PVL-formattile map file and part of the XML file. It provides the row and column offset for the upperleft corner of each tile, relative to the upper left corner of the base image product. Formap-projected image products (Standard and Orthorectified), it also provides thelatitude and longitude of the upper left pixel in the tile.
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Table 6. Tile Map Contents
Field Field Name/Description Format Range / Value
[DG Range / Value, ifdifferent from Format Range
/ Value]
Conditions /
Comments
bandId Identifies the spectral band.
P = Panchromatic, Multi = all Multi-spectralbands (4 for QB and 8 for WV02), N = NearIR,R = Red, G = Green, B = Blue, "RGB" = Red +Green + Blue, "NRG" = Near-IR + Red + Green,BGRN = Blue + Green + Red + Near-IR. RGB,NRG, and BGRN are pan-sharpened color images,stored at the panchromatic spatial resolution. For aDEM, this field indicates the spectral band used tocreate the product.
For WV02 there are also the following bands,N2=NIR2, RE=Red Edge, Y=Yellow,
C=Coastal, RGC=Red+Green+Coastal,RYC=Red+Yellow+Coastal,RYB=Red+Yellow+Blue, MS1=First 4 bands(N,R,G,B), MS2=Second 4 bands (N2,RE,Y,C)
P
Multi
N
R
G
B
RGB
NRG
BGRN
N2RE
Y
C
RGC
RYC
RYB
MS1
MS2
N2, RE, Y and C in anyband combination areavailable for WV02 only
numTiles The number of tiles for this product. Range:
1
tileSizeX Size of the X component (columns) of each . Range:
1
tileSizeY Size of the Y component (lines) of each tile. Range:
1
tileUnits Units of tiles Pixels
Meters
Feet
Degrees
Degrees onlyapplicable for DOQQproducts.
tileOverlap Overlap of tiles. Range:
0
The following group is repeated for n = 1,,numTiles, i.e., once for each of the tiles.
BEGIN_GROUP = TILE_n
filename Filename of the tile. Example:
10JUL04165542-P2AS-052380211010_01_P001.NTF
ULColOffset Column offset of the upper left pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeX
ULRowOffset Row offset of the upper left pixel of this tile, relativeto the upper left pixel of the base image.
Range:
0 - tileSizeY
URColOffset Column offset of the upper right pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeX
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Field Field Name/Description Format Range / Value
[DG Range / Value, if
different from Format Range
/ Value]
Conditions /
Comments
URRowOffset Row offset of the upper right pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeY
LRColOffset Column offset of the lower right pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeX
LRRowOffset Row offset of the lower right pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeY
LLColOffset Column offset of the lower left pixel of this tile,relative to the upper left pixel of the base image.
Range:
0 - tileSizeX
LLRowOffset Row offset of the lower left pixel of this tile, relativeto the upper left pixel of the base image.
Range:
0 - tileSizeY
ULLon The geodetic longitude of the center of the upperleft pixel in the tile.
Range:180.00000000
Precision:
8 decimal places
ULLat The geodetic latitude of the center of the upper leftpixel in the tile.
Range:
90.00000000
Precision:
8 decimal places
URLon The geodetic longitude of the center of the upperright pixel in the tile.
Range:
180.00000000
Precision:
8 decimal places
URLat The geodetic latitude of the center of the upperright pixel in the tile.
Range:90.00000000
Precision:
8 decimal places
LRLon The geodetic longitude of the center of the lowerright pixel in the tile.
Range:
180.00000000
Precision:
8 decimal places
LRLat The geodetic latitude of the center of the lowerright pixel in the tile.
Range:
90.00000000
Precision:
8 decimal places
LLLon The geodetic longitude of the center of the lowerleft pixel in the tile.
Range:
180.00000000
Precision:
8 decimal places
LLLat The geodetic latitude of the center of the lower leftpixel in the tile, in degrees.
Range:
90.00000000
Precision:
8 decimal places
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Field Field Name/Description Format Range / Value
[DG Range / Value, if
different from Format Range
/ Value]
Conditions /
Comments
ULX Easting of the center of the upper left pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
For Standard andOrthorectifiedproducts, only.
productUnits defined inTable 13. ImageMetadata Contents.
ULY Northing of the center of the upper left pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
URX Easting of the center of the upper right pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
URY Northing of the center of the upper right pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
LRX Easting of the center of the lower right pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
LRY Northing of the center of the lower right pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
LLX Easting of the center of the lower left pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
LLY Northing of the center of the lower left pixel of thetile in the specified map projection, datum, andunits of the product.
Value:
0
Precision:
8 decimal places
END_GROUP = TILE_n
END;
SeeAppendix 3.0for an example of a tile map file.
3.3.5 Attitude Data
The Attitude Data file that is delivered with Basic (1B) products providespacecraft attitude estimates necessary for production of orthorectified imageryproducts. Various GIS applications use these data to geometrically correct andgeolocate higher-level image products. This section defines the parameters,
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data types/sizes, ranges, accuracy, and other information corresponding toeach parameter. The file contains attitude and uncertainty estimates at regularintervals of time, nominally 0.02 seconds. The time-span of the file will cover
the interval that spans the imaging event which generated the subject image.
Table 7. Attitude File Contents (.ATT)
Field Field Name/Description Format Range / Value
[DG Range / Value, if different fromFormat Range / Value]
satId Satellite Id. QB02, WV01, WV02, WV03
revNumber Orbit revolution number at startTime. The revolution numberis incremented at the ascending node crossing each orbit.
Range:
1 99999
stripId Unique 6 character catalog Id. Data is represented as anASCII-encoded hexadecimal integer.
Example:
047898
type Type of data .R = Refined attitude.
R
version Version of the data. A for first version, B for second, etc. A, B, C, etc.
generationTime Time of file generation. YYYY-MM-DDThh:mm:ss.ddddddZ
startTime Time of first data point. YYYY-MM-DDThh:mm:ss.ddddddZ
numPoints Number of points in the file. Range:
1
timeInterval Time interval between points. Values:
0.020;
Precision:
3 decimal places
attList List of attitude data. This is a time-sequential list of records
for point = 1,,numPoints. Each record is a list with 15 fieldsin the following order:
point (Short);
Following is the attitude quaternion for this point:
q1 (Double);
q2 (Double);
q3 (Double);
q4 (Double);
Following are the upper-right elements of the attitudequaternion covariance matrix for this point:
(1,1) element (Float)
(1,2) element (Float)
(1,3) element (Float)(1,4) element (Float)
(2,2) element (Float)
(2,3) element (Float)
(2,4) element (Float)
(3,3) element (Float)
(3,4) element (Float)
(4,4) element (Float)
The quaternions describe the rotation of the spacecraft
Ranges:
Quaternions will range between1.00;
Covariances will range between
0 1 e -07
(this is not a theoretical range, butthe values observed have not fallenoutside of this range)
Precision:
16 decimal places for all floatingpoint and double precision values.
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Field Field Name/Description Format Range / Value
[DG Range / Value, if different fromFormat Range / Value]
coordinate system relative to the ECF frame.
3.3.5.1 Example Attitude Data File
satId = "WV01";revNumber = 18858;stripId = "117BCE";type = "R";version = "A";generationTime = 2011-02-07T19:25:02.000000Z;startTime = 2011-02-07T18:07:31.360000Z;numPoints = 223;timeInterval = 0.020;attList = (( 1, -0.5663632931057035, 0.6761133037075275, 0.3557184219506136, 0.3091404616951993,0.0000000002130000, 0.0000000001730000, 0.0000000000270000, -0.0000000000201000,
0.0000000001760000, -0.0000000000225000, -0.0000000000406000, 0.0000000001400000, -0.0000000000630000, 0.0000000001250000),( 2, -0.5662157377758605, 0.6760040573446036, 0.3559177386019274, 0.3094201287845736,0.0000000002130000, 0.0000000001730000, 0.0000000000270000, -0.0000000000201000,0.0000000001760000, -0.0000000000225000, -0.0000000000406000, 0.0000000001410000, -0.0000000000631000, 0.0000000001250000),( 3, -0.5660681203995883, 0.6758947104771151, 0.3561170802513836, 0.3096996102186175,0.0000000002130000, 0.0000000001730000, 0.0000000000271000, -0.0000000000201000,0.0000000001760000, -0.0000000000225000, -0.0000000000406000, 0.0000000001410000, -0.0000000000632000, 0.0000000001250000),...( 223, -0.5318075220863849, 0.6495808525484328, 0.3984067215630276, 0.3694557614494473,0.0000000002030000, 0.0000000001560000, 0.0000000000364000, -0.0000000000213000,0.0000000001640000, -0.0000000000191000, -0.0000000000444000, 0.0000000001540000, -0.0000000000803000, 0.0000000001340000));END;
3.3.6 Ephemeris Data
The Ephemeris Data file that is delivered with Basic (1B) products containspacecraft ephemeris data. These data are a time history of refinedephemerides and their associated uncertainties. The DG Ground Systemderives these ephemerides from spacecraft telemetry and other supportingGPS data. Various GIS applications use these data to geometrically correct andgeolocate higher-level image products. This section defines the parameters,data types/sizes, ranges, accuracy, and other information corresponding to
each parameter. The file contains ECF position data and associateduncertainty estimates at regular intervals of time, nominally 0.2 seconds.(NOTE: For Basic (1B) products, the time intervals are 0.02 seconds.) Thetime-span of the file will cover the interval that spans the imaging event whichgenerated the subject image.
Table 8. Ephemeris File Contents (.EPH)
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Field Field Name/Description Format Range / Value
[DG Range / Value, if different fromFormat Range / Value]
satId Satellite Id. QB02, WV01, WV02, WV03
revNumber Orbit revolution number at startTime. The revolution number isincremented at the ascending node crossing each orbit.
Range:
1 to 99999
stripId Unique 6 character catalog Id. Example:
047898
type Type of data : R = Refined ephemeris. R
version Version of the data. A for first version, B for second, etc. A, B, C, etc.
generationTime Time of .EPH file generation. YYYY-MM-DDThh:mm:ss.ddddddZ
startTime Time of first data point. YYYY-MM-DDThh:mm:ss.ddddddZ
numPoints Number of points in the file. Range:
1
timeInterval Time interval between points. Values:
For Metadata-Only and LV1A:
0.200
For LV1B:
0.020
Precision:
3 decimal places
ephemList List of ephemeris data. This is a time-sequential list of records forpoint = 1,,numPoints. Each record is a list with 13 fields in thefollowing order (field type is in parenthesis):
point (Short);
Following is the spacecraft position and velocity for this point:
X position (Double);
Y position (Double);
Z position (Double);
X velocity (Double);
Y velocity (Double);
Z velocity (Double);
Folowing are the upper-right elements of the position covariancematrix for this point:
(1,1) element (Float);
(1,2) element (Float);
(1,3) element (Float);
(2,2) element (Float);
(2,3) element (Float);
(3,3) element (Float);All measurements are in the ECF coordinate system. Positionsare in meters and velocities in m/sec. Positon variances andcovariances are in m
2.
Ranges:
Position ranges will be within:
6910000.00
for QB02 and WV01;
7150000.00
for WV02.
Velocity ranges should be within:
7750.00 for QB02;
7608.00 for WV01;
7462.00 for WV02.
Covariance ranges should fallwithin:
0 0.01
Precision:
16 decimal places for floating point
and double floating point values.
3.3.6.1 Example Ephemeris Data File
satId = "WV01";revNumber = 18858;stripId = "117BCE";type = "R";
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version = "A";generationTime = 2011-02-07T19:27:47.102466Z;startTime = 2011-02-07T18:07:31.200000Z;numPoints = 24;
timeInterval = 0.200;ephemList = (( 1, -1288858.0326000000000000, -5140532.7109000000000000, 4366935.1416000000000000, -2767.9697902000000000, -4240.1756961000000000, -5792.4066650000000000, 0.0016992631555000,0.0007594386873400, 0.0012291084037000, 0.0025600337587000, 0.0022366293743000, 0.0044390571288000),( 2, -1289411.6073000000000000, -5141380.6121000000000000, 4365776.5527000000000000, -2767.7779224000000000, -4238.8366283000000000, -5793.4830487000000000, 0.0016991825214000,0.0007590921721000, 0.0012292464961000, 0.0025591463270000, 0.0022363795857000, 0.0044403370330000),( 3, -1289965.1438000000000000, -5142228.2457000000000000, 4364617.7482000000000000, -2767.5858799000000000, -4237.4973573000000000, -5794.5591478000000000, 0.0016991018374000,0.0007587455934600, 0.0012293844185000, 0.0025582589889000, 0.0022361293180000, 0.0044416169450000),...( 24, -1301580.4776000000000000, -5159966.6058000000000000, 4340233.2382000000000000, -2763.5126222000000000, -4209.3259783000000000, -5817.0912978000000000, 0.0016973960248000,0.0007514527448800, 0.0012322417568000, 0.0025396466778000, 0.0022307632800000, 0.0044684980664000));
END;
3.3.7 Rational Polynomial Coefficients
This section describes the content of the PVL-format RPC00B file and thecorresponding part of the XML file. It contains the coefficients for Rapid PositioningCapability, also called Rational Polynomial Coefficients (RPC), in particular, thecoefficients used in the RPC NITF support data extension RPC00B in reference 3. Thisis a mathematical mapping from object space coordinates to image space coordinates.This mapping includes non-ideal imaging effects, such as lens distortion, lightaberration, and atmospheric refraction.RPC00Bs express the normalized column and row values in an image, (cn, rn), as a ratio
of polynomials of the normalized geodetic latitude, longitude, and height, (P, L, H).Normalized values are used instead of actual values in order to minimize numericalerrors in the calculation. The scales and offset of each parameter are selected so thatall normalized values fall in the range [-1, 1]. The normalization used is as follows:
P = (Latitude - LAT_OFF) / LAT_SCALE
L = (Longitude - LONG_OFF) / LONG_SCALE
H = (Height - HEIGHT_OFF) / HEIGHT_SCALE
rn = (ROW - LINE_OFF) / LINE_SCALE
cn = (Column - SAMP_OFF) / SAMP_SCALE
Each polynomial is up to third order in (P, L, H), having as many as 20 terms. The
rational functions are
=
=
=
=
=
=20
1
20
1
20
1
20
1
),,(__
),,(__
),,(__
),,(__
i
ii
i
ii
n
i
ii
i
ii
n
HLPpCOEFDENSAMP
HLPpCOEFNUMSAMP
cand
HLPpCOEFDENLINE
HLPpCOEFNUMLINE
r
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LINE_NUM_COEF, LINE_DEN_COEF, SAMP_NUM_COEF, and SAMP_DEN_COEFare 20-term vectors of coefficients that are given in the RPC00B file. p(P,L,H) is a 20-term vector of with the following terms:
Table 9. RPC Terms
I pi (P,L,H) I pi (P,L,H)
1 1 11 PLH
2 L 12 L3
3 P 13 LP2
4 H 14 LH2
5 LP 15 L2P
6 LH 16 P3
7 PH 17 PH2
8 L2 18 L2H
9 P2 19 P2H
10 H2 20 H3
For example, for a generic set of polynomial coefficients Ci, the corresponding 20-termcubic polynomial has the form
f(P, L, H) = C1 + C2L + C3P + C4H + C5LP + C6LH + C7PH + C8L2+ C9P
2+ C10H2+
C11 PLH + C12L
3
+ C13LP
2
+ C14LH
2
+ C15L
2
P + C16P
3
+ C17PH
2
+ C18L
2
H + C19P
2
H +C20H3
The image coordinates are expressed in pixels. The ground coordinates are latitudeand longitude in decimal degrees, and geodetic elevations (height above the ellipsoid)in meters.
There is only one set of coefficients for Basic, Stereo, and Standard products since theirmulti-spectral bands are co-registered and the images are geometrically continuouswithin each band. The range of values for each numeric parameter is as specified inThe Compendium of Controlled Extensions (CE) for the National Imagery Transmission Format
(NITF). Out-of-range coefficients are set to zero.
Table 10. RPC00B Contents
Field Field Name/Description Format Range / Value
[DG Range / Value, if
different from Format
Range / Value]
Conditions /
Comments
http://www.gwg.nga.mil/ntb/baseline/docs/stdi0002/index.htmlhttp://www.gwg.nga.mil/ntb/baseline/docs/stdi0002/index.htmlhttp://www.gwg.nga.mil/ntb/baseline/docs/stdi0002/index.htmlhttp://www.gwg.nga.mil/ntb/baseline/docs/stdi0002/index.htmlhttp://www.gwg.nga.mil/ntb/baseline/docs/stdi0002/index.html7/30/2019 Imagery Support Data Documentation
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Field Field Name/Description Format Range / Value
[DG Range / Value, if
different from Format
Range / Value]
Conditions /
Comments
satId Satellite Id. QB02, WV01,WV02, WV03
bandId Identifies the spectral band.
P = Panchromatic, Multi = all Multi-spectral bands (4 for QB and 8 for WV02),N = NearIR, R = Red, G = Green, B= Blue, "RGB" = Red + Green + Blue,"NRG" = Near-IR + Red + Green, BGRN =Blue + Green + Red + Near-IR. RGB, NRG,and BGRN are pan-sharpened color
images, stored at the panchromatic spatialresolution. For a DEM, this field indicatesthe spectral band used to create theproduct.
For WV02 there are also the followingbands, N2=NIR2, RE=Red Edge,Y=Yellow, C=Coastal
P
Multi
N
R
G
B
RGB
NRG
BGRN
N2
RE
Y
C
RGC
RYC
RYB
MS1
MS2
N2, RE, Y and Cin any bandcombination areavailable forWV02 only
SpecId Identification of the specification whichdefines the RPC implementation used forgenerating and/or interpreting thecoefficients
RPC00B
The following nested groups for BANDs and DETECTOR_ARRAYs are included only for Metadata andCal/Val products.
The following BAND group is repeated for each spectral band in the delivered image product. The index b inthe group name is one of (P,N,R,G,B,N2,RE,Y,C) to differentiate the band group names.
BEGIN_GROUP = BAND_b Only applicablefor Metadata-Only, Level 0,and Level 1Aproducts.
The following DETECTOR_ARRAY group is repeated for n = 1,,numDetArr, i.e., for each linear detectorarray in the spectral band.
BEGIN_GROUP = DETECTOR_ARRAY_n Only applicablefor Metadata-Only, Level 0,and Level 1Aproducts.
errBias Bias error. 68% non time-varying errorestimate for correlated images.
Range:
0.00 9999.99
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Field Field Name/Description Format Range / Value
[DG Range / Value, if
different from Format
Range / Value]
Conditions /
Comments
Precision:
2 decimal places
errRand Random error. 68% time-varying errorestimate for correlated images.
Range:
0.00 9999.99
Precision:
2 decimal places
lineOffset LINE_OFFSET. Range:
0 999999
sampOffset SAMP_OFFSET. Range:0 999999
latOffset LAT_OFFSET. Range:
90.0000
Precision:
4 decimal places
longOffset LONG_OFFSET. Range:
180.0000
Precision:
4 decimal places
heightOffset HEIGHT_OFFSET. Range:
9999
lineScale LINE_SCALE Range:
1 - 99999
sampScale SAMP_SCALE Range:
1 - 99999
latScale LAT_SCALE Range:
90.0000
Precision:
4 decimal places
longScale LONG_SCALE Range:
180.0000
Precision:4 decimal places
heightScale HEIGHT_SCALE Range:
9999
lineNumCoef LINE_NUM_COEF. Twenty coefficients forthe polynomial in the numerator of the rnequation.
Range:
9.999999109
lineDenCoef LINE_DEN_COEF. Twenty coefficients for Range: