ACCURACY STUDIES

Test Area

The test areas were chosen based on the availability of high accuracy reference data:

  • Garlock Fault test area – LiDAR
  • Asmara, Eritrea – D-GPS ground control points surveyed for gravimetric studies

Asmara, Eritrea

ERITREA ACCURACY STUDY

Garlock Fault, California

CALIFORNIA ACCURACY STUDY

Survey grids derived from DigitalGlobe WorldView imagery

The underlying plot shows the relationship between ground control point density and PhotoSat survey grid accuracy for grids derived from photo pairs of the DigitalGlobe’s WorldView constellation.

Complete Results

The underlying tables list all the recent accuracy studies conducted by PhotoSat. For detailed information on any of the studies, please see the respective report.

Accuracy (RMSE) < 15cm

Accuracy (RMSE) from 15cm to 20cm

Location Satellite, # of GCP, RMSE
Eritrea WorldView-3, 2 GCP, RMSE 19cm
Eritrea WorldView-2, 2 GCP, RMSE 19cm
Eritrea WorldView-1, 21 GCP, RMSE 19cm

Accuracy (RMSE) from 20cm to 30cm

Accuracy (RMSE) from 30cm to 50cm

Location Satellite, # of GCP, RMSE
Garlock Fault Kompsat-3A, 1 GCP, RMSE 50cm
Eritrea Kompsat-3A, 11 GCP, RMSE 48cm
Eritrea Kompsat-3A, 1 GCP, RMSE 53cm

Accuracy (RMSE) from 1m to 2m

Location Satellite, # of GCP, RMSE
Eritrea ALOS PRISM, 3 GCP, RMSE 1.2m
Eritrea SPOT 7, 1 GCP, RMSE 1.4m

Accuracy (RMSE) from 2m to 3m

Location Satellite, # of GCP, RMSE
Eritrea ALOS PRISM, 1 GCP, RMSE 2.4m

Earlier accuracy studies:

2008 to 2015 Accuracy Studies

View Accuracy Studies