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?
