# Skycatch Flight App Standard Ground Sampling Distance

The table below shows the GSD per altitude and expected X, Y, and Z accuracy.

Resolution (GSD) |
X, Y-accuracy |
Z-accuracy |
Altitude |

1 | Approx. 3 cm | Approx. 5 cm | 80m |

2 | Approx. 6 cm | Approx. 10 cm | 160m |

3 | Approx. 9 cm | Approx. 15 cm | 240m |

4 | Approx. 12 cm | Approx. 20 cm | 320m |

5 | Approx. 15 cm | Approx. 25 cm | 400m |

## Key Points:

- The expected accuracy for the X & Y coordinates is 3x GSD horizontally.
- The expected accuracy for the Z coordinate is 5x GSD vertically.
- The rule of thumb for transferring from GSD to Z accuracy is multiplying the GSD value by 5.

## Comments