Table 1 Image block parameters and root mean square errors (RMSE) of the block adjustment
From: Stand-level wind damage can be assessed using diachronic photogrammetric canopy height models
Month/Year | Photograph type and number | Flying altitude (m) | Forward and side overlaps (%) | Ground sampling distance (cm) | Block adjustment RMSE (xy-z) (cm) | Number ground control points | |
|---|---|---|---|---|---|---|---|
09/1999 | Film 1200 dpi | 18 | 3750 | 60–20 | 55 | 238–170 | 34 |
06/2002 | Film 1200 dpi | 74 | 1900 | 80–30 | 28 | 29–29 | 34 |
09/2009 | Digital | 29 | 5400 | 60–20 | 33 | 17–38 | 43 |