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CARSI & DOITTCo-operative NYCMap
Maintenance & Enhancement
Products and Application Development
• Incremental Updates
• BIN Project
• Creation of NYC DEM
NYCMap Specifications
2001-02 update enhanced 0.75 feet orthophotography true orthophotos for Manhattan 3-D model of every building in Manhattan
and every block in other boroughs with a building >= 7 stories
New Features: billboards, park paths, ballfields, pools, etc.
NYCMap Creation and Update: “the Old Way”
Hard Copy Maps with Corrections
Sanborn Re-checkGeometric accuracy
Positional correctness
Send to Sanbornas hard copy
Correct
Export to CARSI
Hard Copy Maps
CARSIInspect forcorrectness
Process repeats for each of the 1,900 tiles in base map.
Updated Base Map
Updated Hard Copy Maps
Send correctionsto Sanbornas hard copy.
Repeat process 2-3 timesuntil correct.
Updating the NYCMap from 1996 to
2001-2 : the New Way
Incremental Updating Process Capture new objects, deleted objects and update
objects photogrammetrically Bring in QC objects for review
• compare with new orthophotography• test against changes registered by DOB and DDC• accept or reject QC objects
• accept - system updated automatically Validation of accepted QC object
SANBORNPhoto Update
NYCMap Incremental Updates and Database Integration
InsertChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
ChangesAccept
Changes
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
Aerial SurveyKinematic GPS
Inertial Navigation Unit
ScanningBundle
AdjustmentStereo-model
Orthophoto
Import old basemap
Supply of GPS Data
Compilation
Analog and/or digital output
Detectchanges
Capture changes
GenericASCII
CARSI QC Objects
Sanborn Process
Film Development
Control Points
ChangedObjectsDetect
changes
NYCMap Incremental Updates and Database Integration
Aerial SurveyKinematic GPS
Inertial Navigation Unit
ScanningBundle
AdjustmentStereo-model
Orthophoto
Import old basemap
Supply of GPS Data
Compilation
Analog and/or digital output
Detectchanges
Capture changes
GenericASCII
CARSI QC Objects
Sanborn Process
Film Development
Control Points
SanbornRe-check
SANBORNPhoto Update Generic
ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
Generic ASCII
CARSIQA Objects
NYCMap Incremental Updates and Database Integration
InspectChanges
SANBORNPhoto Update
ChangedObjectsDetect
changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
Base Map QC/QA objects:
• Approximately 320 tiles (2000m.sq.)
• Average number of QA objects per tile: 700
Insert
Update
Delete
Tile # 30056
Generic ASCII
CARSIQA Objects
NYCMap Incremental Updates and Database Integration
InspectChanges
SANBORNPhoto Update
ChangedObjectsDetect
changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
Base Map:1996 Ortho-photographyand planimetric data
Generic ASCII
CARSIQA Objects
NYCMap Incremental Updates and Database Integration
InspectChanges
SANBORNPhoto Update
ChangedObjectsDetect
changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
Base Map:2001 Ortho-photographyand planimetric data
Generic ASCII
CARSIQA Objects
NYCMap Incremental Updates and Database Integration
InspectChanges
SANBORNPhoto Update
ChangedObjectsDetect
changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
QC/QA Objects
Base Map:2001 Ortho-photographyand planimetric data
Generic ASCII
CARSIQA Objects
NYCMap Incremental Updates and Database Integration
InspectChanges
SANBORNPhoto Update
ChangedObjectsDetect
changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
UPDATED NYCMap
Apply to database
Update
DeleteCorrect
QC/QA Objects
2001 Updated Base Map
Base Map:2001 Ortho-photographyand planimetric data
InspectChanges
Insert
Update
Delete
NYCMap Incremental Updates and Database Integration
Before accepting changes After accepting changes
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
UPDATED NYCMap
Apply to database
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects
SanbornRe-check Reject Changes
Correct
Buildings
InspectChanges
Insert
Update
Delete
NYCMap Incremental Updates and Database Integration
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
UPDATED NYCMap
Apply to database
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects
SanbornRe-check Reject Changes
Correct
Before accepting changes After accepting changes
Buildings Changed
InspectChanges
Insert
Update
Delete
NYCMap Incremental Updates and Database Integration
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
UPDATED NYCMap
Apply to database
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects
SanbornRe-check Reject Changes
Correct
Before accepting changes After accepting changes
Buildings Deleted
NYCMap Incremental Updates and Database Integration
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
UPDATED NYCMap
Apply to database
Update
Delete
Reject ChangesSanbornRe-check
Correct
Rejected QC Object for new building
New building’s polygonoverlaps existing building
NYCMap Incremental Updates and Database Integration
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
UPDATED NYCMap
Apply to database
Update
Delete
Reject ChangesSanbornRe-check
Correct
Features overlooked by Sanborn
QC rejected object
Sanborn Re-checkGeometric accuracy
Positional correctness
Changed Objects
CARSI QC Objects
Send to Sanbornas Generic ASCII
Correct
Send to CARSIas Generic ASCII
Missed feature
Capture geometry and position
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
NYCMap Incremental Updates and Database Integration
UPDATED NYCMap
Apply to database
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
SanbornRe-check Reject Changes
Update
DeleteCorrect
GEOMETRY
Buildings
•Internals - completely surrounded/bordered by buildings?
•Faces - bordered by exactly one building polygon?
•Edges
Must be building internal if shared by two or more buildings
Must be building face if not shared with another building
•Slivers – report all buildings smaller then 5 square feet
Street Centerlines
•Street-centreline – feature overlap
•Intersection of hidden street-centreline with visible street-centreline
Visible street centerline may continue onto hidden segment with same name.
•Not connected street-centrelines
•Street-centerlines that end at something other than a dead-end or street intersection (3 or more street centerlines).
ATTRIBUTES
Railroad
•Name inconsistencies along connected railroad lines
Street Centerlines
•Street-centreline – LION file: report any inconsistent street names based on LION
UPDATED NYCMapApply to
database
NYCMap Incremental Updates and Database Integration
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
Update
DeleteCorrect
Base Map 2003
• Approximately 320 tiles (2000m.sq.)
• Average number of QA objects per tile: 700
• Average number of rejected QA objects per tile: 30
• Estimated number of changes: 224,000
Accepted QA/QC objects
Rejected QA/QC objects
Map Legend
UPDATED NYCMapApply to
database
NYCMap Incremental Updates and Database Integration
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
Update
DeleteCorrect
Buildings Building Component, Building Internal
Open Spaces
Transportation •Curbs•Street centerlines
•Railroads•Transportation Structures Bridge, Tunnel, Railroad Viaduct
Utility Tank, Tower, Antenna
Billboard-Toll
Topography Spot Elevations, Contour Lines
Hydrography•Hydro centrelines•Hydro features Lake, Reservoir, Pond, Wetland. Beach, Bay•Hydro Structures Pier, Jetty, Seawall
Cemetery, Recreation Areas, Ball Fields, Pools, Hard Surface Courts, Skating Rings, Playgrounds, Parking lots.
Power Plant Substation
Bike Pedestrian Path, Unpaved trails in parks
Unpaved Trails in Parks
NYCMap Incremental Updates and Database Integration
Apply to database
UPDATED NYCMap
SANBORNPhoto Update
ChangedObjectsDetect
changesGeneric ASCII
CARSIQA Objects Inspect
Changes
Insert
AcceptChanges
VALIDATIONGeometric TopologyAttribute Consistency
SanbornRe-check Reject Changes
Update
DeleteCorrect
Base Map: 1996Checkpoint: 10/10/1996 11:12:07
Base Map: 2003Checkpoint: 9/24/2003 13:11:09Objects: 37,812
Base Map: ChangesCheckpoint: 9/24/2003 13:11:09Objects: 704
NYCMap Users
Propagate Changes
Export changes as ASCII
Propagation of Base Map Changes to City Agencies
Detect Changes
Incremental Updates: “the New Way”
Implications of Incremental Updates Application
• Save Money• Save Time• Incremental Updates• Improve Data Quality