What does PhotoSat deliver to me?

Standard PhotoSat surveying package Common Formats (Additional formats available)
50cm colour or grayscale precision satellite ortho photo Floating point GeoTiff
20cm or 30cm accuracy 1m bare earth elevation grid (DEM/DTM) Elevation grid: Floating Point Geotiff or .MIG (MapInfo compatible) or ASCII XYZ or .DXF
50cm or 1m contours (plus 5m 10m and 50m contours) Contours: 3D ArcGIS Shapefile or 2D MapInfo or 3D DWG
Colour elevation image (in areas of sparse vegetation) Floating point GeoTiff
Direction of slope image (in areas of sparse vegetation) Floating point GeoTiff

Thinned Grids:

PhotoSat surveys can cover large areas resulting in large file sizes. PhotoSat can deliver thinned files, which makes opening and working with these files much easier. See thinned grids for more details.

 

Additional Deliverables:

License Agreements:

  • DigitalGlobe License Agreement or Airbus: Pleiades End-User License Agreement
  • PhotoSat General Terms of Sale

Accuracy & Ground Control

PhotoSat’s elevation grids have been demonstrated to have a relative vertical accuracy of 15cm to 30cm RMSE, and a relative horizontal accuracy of 50cm RMSE over horizontal distances of 10km. See PhotoSat accuracy discussion for more details on surveying accuracy.

  • To achieve 30cm RMSE absolute accuracy, a minimum of 3 survey ground control points accurate to better than 10cm are required for areas up to 200km²
  • To achieve 20cm RMSE absolute accuracy, a minimum of 10 survey ground control points accurate to better than 10cm are required for areas up to 100km²
  • To achieve 15cm RMSE absolute accuracy, a minimum of 100 survey ground control points accurate to better than 10cm are required for areas up to 100km²

For larger projects, we request one ground control point every additional 200km². In the absence of ground control points, the relative accuracy specifications apply and absolute accuracy is expected to be better than 3m RMSE.  See PhotoSat ground control guidelines for more details on surveying ground control points.

For more information on PhotoSat surveying products, see the following:

PhotoSat surveying accuracy overview

PhotoSat accuracy studies

PhotoSat case histories

To talk to a PhotoSat survey expert, email info@photosat.ca or phone 1-604-681-9770

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