QC of Imagery with FME at Manitoba HydroSarah Wach and Rob GerryGeospatial Data Services, Manitoba Hydro

April 23, 2012

FME at Manitoba Hydro

Started using early 2000’s

Data format conversions

Coordinate system transformations

NTDB formatting for ESRI SDE

Image mosaics/compression

Day to day data processing

Production mode for parcel fabric updating

Best Available Digital Ortho Imagery

• 56 data sources

• Air Photo & Satellite

• 10cm to 15m resolution

• color & greyscale

• ~ 4 TB’s and growing

• 7 areas

• 6600 Sq. Km’s

• 1090 tiles

• 2 aircraft

2011 DOIAcquisition

Testing Parameters

Proper naming (eg. 51061010) Horizontal Datum (NAD83 – zone 14) Tile Size (2.5 km sq.) Image Resolution (20cm) Colour Balance Georeference

Inputs

Uses published parameters to make the workbench reusable and user friendly

Testing Values

Information for naming the output files

Locations for the Sources and Destinations

Test for Tiff Naming

Test for Datum and Tile Size

Test for Image Resolution

Low Resolution Raster Creation

Outputs

CSV file with results of the tests Shapefile with the tiff bounding boxes Low resolution ecw file

Results

Prior to the FME workspace only a few tiles out of a dataset would have been checked

Enables a complete QC process

Creates a record of the QC process

Allows more time for visual checks

FME Applications in Development

Caribou GPS tracking collar conversion

LiDAR QC

XML metadata

Thank You!

Questions?