Hyrnestabben
Connected component size 99%
24 February 2022
Survey Data
Fig. 1. Camera locations and image overlap.
| Camera Model | Resolution | Focal Length | Pixel Size | Precalibrated |
| NIKON D800 (50mm) | 4924 x 7374 | 50 mm | 4.88 x 4.88 μm | No |
Table 1. Cameras.
Camera Calibration
Fig. 2. Image residuals for NIKON D800 (50mm).
NIKON D800 (50mm)
79 images
| Value | Error | F | Cx | Cy | B1 | B2 | K1 | K2 | K3 | P1 | P2 | |
| F | 10563.8 | 0.48 | 1.00 | 0.12 | -0.15 | -0.65 | -0.02 | 0.04 | 0.09 | -0.08 | 0.06 | -0.41 |
| Cx | 27.3583 | 0.49 | 1.00 | 0.22 | -0.29 | 0.38 | 0.03 | 0.03 | -0.01 | 0.80 | 0.07 | |
| Cy | 13.5732 | 0.64 | 1.00 | -0.47 | 0.10 | -0.05 | -0.02 | 0.06 | 0.14 | 0.37 | ||
| B1 | -2.98152 | 0.4 | 1.00 | -0.10 | -0.03 | -0.04 | 0.01 | -0.15 | 0.19 | |||
| B2 | 12.0062 | 0.3 | 1.00 | 0.00 | 0.01 | -0.01 | 0.00 | -0.04 | ||||
| K1 | -0.11073 | 7.9e-05 | 1.00 | -0.92 | 0.85 | 0.04 | -0.16 | |||||
| K2 | 0.0818022 | 0.001 | 1.00 | -0.98 | 0.00 | -0.03 | ||||||
| K3 | 0.170414 | 0.004 | 1.00 | 0.01 | 0.04 | |||||||
| P1 | 0.00039216 | 1.1e-05 | 1.00 | 0.15 | ||||||||
| P2 | 0.000716613 | 9.4e-06 | 1.00 |
Table 2. Calibration coefficients and correlation matrix.
Camera Locations
Fig. 3. Camera locations and error estimates.
Z error is represented by ellipse color. X,Y errors are represented by ellipse shape.
Estimated camera locations are marked with a black dot.
| X error (m) | Y error (m) | Z error (m) | XY error (m) | Total error (m) |
| 11.8057 | 12.5293 | 9.47365 | 17.2151 | 19.6496 |
Table 3. Average camera location error.
X - Easting, Y - Northing, Z - Altitude.
Digital Elevation Model
Fig. 4. Reconstructed digital elevation model.
Processing Parameters
| General | |
| Cameras | 79 |
| Aligned cameras | 79 |
| Coordinate system | WGS 84 / UTM zone 33N (EPSG::32633) |
| Rotation angles | Yaw, Pitch, Roll |
| Point Cloud | |
| Points | 146,856 of 170,711 |
| RMS reprojection error | 0.147154 (0.372321 pix) |
| Max reprojection error | 1.06099 (11.2145 pix) |
| Mean key point size | 2.41797 pix |
| Point colors | 3 bands, uint8 |
| Key points | No |
| Average tie point multiplicity | 3.95174 |
| Alignment parameters | |
| Accuracy | High |
| Generic preselection | Yes |
| Reference preselection | Source |
| Key point limit | 80,000 |
| Tie point limit | 8,000 |
| Guided image matching | No |
| Adaptive camera model fitting | Yes |
| Matching time | 1 minutes 15 seconds |
| Matching memory usage | 1.80 GB |
| Alignment time | 28 seconds |
| Alignment memory usage | 118.63 MB |
| Optimization parameters | |
| Parameters | f, b1, b2, cx, cy, k1-k3, p1, p2 |
| Adaptive camera model fitting | No |
| Optimization time | 1 seconds |
| Software version | 1.6.4.10928 |
| File size | 14.15 MB |
| Depth Maps | |
| Count | 79 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Aggressive |
| Processing time | 8 minutes 42 seconds |
| Memory usage | 5.05 GB |
| Software version | 1.6.4.10928 |
| File size | 576.14 MB |
| Dense Point Cloud | |
| Points | 187,458,419 |
| Point colors | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Aggressive |
| Processing time | 8 minutes 42 seconds |
| Memory usage | 5.05 GB |
| Dense cloud generation parameters | |
| Processing time | 8 minutes 58 seconds |
| Memory usage | 13.45 GB |
| Software version | 1.6.4.10928 |
| File size | 2.72 GB |
| Model | |
| Faces | 1,500,000 |
| Vertices | 761,087 |
| Vertex colors | 3 bands, uint8 |
| Texture | 4,096 x 4,096 x 10, 4 bands, uint8 |
| Texturing parameters | |
| Mapping mode | Generic |
| Blending mode | Mosaic |
| Texture size | 4,096 |
| Enable hole filling | Yes |
| Enable ghosting filter | Yes |
| UV mapping time | 4 minutes 47 seconds |
| UV mapping memory usage | 5.24 GB |
| Blending time | 1 minutes 49 seconds |
| Blending memory usage | 6.55 GB |
| File size | 349.48 MB |
| Tiled Model | |
| Texture | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Aggressive |
| Processing time | 8 minutes 42 seconds |
| Memory usage | 5.05 GB |
| Reconstruction parameters | |
| Source data | Dense cloud |
| Tile size | 256 |
| Face count | Medium |
| Enable ghosting filter | No |
| Processing time | 2 hours 27 minutes |
| Memory usage | 4.97 GB |
| Software version | 1.7.2.12040 |
| File size | 976.83 MB |
| System | |
| Software name | Agisoft Metashape Professional |
| Software version | 1.7.2 build 12040 |
| OS | Windows 64 bit |
| RAM | 127.78 GB |
| CPU | Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz |
| GPU(s) | GeForce RTX 2080 |