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What's the Z Accuracy of Data Captured with Skycatch Flight App?


Standard Ground Sampling Distance (GSD) when using Skycatch flight app:

Resolution (GSD) Z-accuracy Altitude
2 3 - 6 cm 40m
3 4.5 - 9 cm 60m
4 6 - 12 cm 80m
5 7.5 - 15 cm 100m
6 9 - 18 cm 120m 

The expected accuracy for the X & Y coordinates is 1 - 2 GSD horizontally.

The expected accuracy for the Z coordinate is 1 - 3 GSD vertically.

The rule of thumb for transferring from GSD to Z accuracy is multiplying the GSD value by 1.5 - 3.

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