Ground control points spreading recommendation in relation to desired topographic mapping scale for elongated projects:
Num. |
Map Scale |
2 GCP in both project side in each DL or DW [m] |
Accuracies in MSE in 95% [cm] |
Pixel foot print [cm] |
1 |
1:250 |
50.0 |
± 12 |
2.5 |
2 |
1:500 |
100.0 |
± 25 |
5.0 |
3 |
1:1250 |
250.0 |
± 30 |
12.5 |
4 |
1:2500 |
500.0 |
± 40 |
25.0 |
5 |
1:5000 |
1000.0 |
± 80 |
50.0 |
6 |
1:10,000 |
2000.0 |
± 120 |
100.0 |
Ground control points distribution recommendation in relation to desired topographic mapping scale for polygonal (area) projects:
Num. |
Map Scale |
1 GCP in each square DL X DL in [m] |
Accuracies in MSE in 95% [cm] |
Pixel foot print [cm] |
1 |
1:250 |
50.0 |
± 12 |
2.5 |
2 |
1:500 |
100.0 |
± 25 |
5.0 |
3 |
1:1250 |
250.0 |
± 30 |
12.5 |
4 |
1:2500 |
500.0 |
± 40 |
25.0 |
5 |
1:5000 |
1000.0 |
± 80 |
50.0 |
6 |
1:10,000 |
2000.0 |
± 120 |
100.0 |