Stjerthogda
Filtering: Dense cloud: 4-255 Connected mesh: 99%
19 February 2022
Survey Data
Fig. 1. Camera locations and image overlap.
| Camera Model | Resolution | Focal Length | Pixel Size | Precalibrated |
| L1D-20c (10.26mm) | 5472 x 3648 | 10.26 mm | 2.41 x 2.41 μm | No |
Table 1. Cameras.
Camera Calibration
Fig. 2. Image residuals for L1D-20c (10.26mm).
L1D-20c (10.26mm)
1713 images
| Value | Error | F | Cx | Cy | B1 | B2 | K1 | K2 | K3 | K4 | P1 | P2 | |
| F | 4325.3 | 0.081 | 1.00 | -0.02 | 0.83 | -0.96 | -0.02 | -0.05 | 0.04 | -0.03 | 0.02 | -0.02 | 0.06 |
| Cx | 17.0872 | 0.041 | 1.00 | -0.03 | 0.02 | 0.61 | 0.00 | 0.00 | -0.00 | 0.01 | 0.72 | -0.02 | |
| Cy | -51.2724 | 0.085 | 1.00 | -0.93 | -0.02 | 0.01 | -0.02 | 0.02 | -0.03 | -0.02 | 0.33 | ||
| B1 | 7.81776 | 0.095 | 1.00 | 0.02 | -0.01 | 0.01 | -0.02 | 0.02 | 0.02 | -0.12 | |||
| B2 | -0.937097 | 0.039 | 1.00 | 0.00 | 0.00 | -0.00 | 0.00 | -0.02 | -0.01 | ||||
| K1 | 0.00358862 | 2.7e-05 | 1.00 | -0.97 | 0.92 | -0.87 | 0.00 | -0.02 | |||||
| K2 | -0.00822285 | 0.00019 | 1.00 | -0.99 | 0.96 | 0.00 | -0.01 | ||||||
| K3 | 0.0421321 | 0.0005 | 1.00 | -0.99 | -0.00 | 0.02 | |||||||
| K4 | -0.0583686 | 0.00047 | 1.00 | 0.00 | -0.02 | ||||||||
| P1 | 0.0014115 | 2.1e-06 | 1.00 | -0.02 | |||||||||
| P2 | -0.00264232 | 1.2e-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) |
| 4.97126 | 3.32786 | 1.33135 | 5.98231 | 6.12867 |
Table 3. Average camera location error.
X - Longitude, Y - Latitude, Z - Altitude.
Digital Elevation Model
Fig. 4. Reconstructed digital elevation model.
Processing Parameters
| General | |
| Cameras | 1713 |
| Aligned cameras | 1710 |
| Shapes | |
| LineString | 6 |
| Coordinate system | WGS 84 (EPSG::4326) |
| Rotation angles | Yaw, Pitch, Roll |
| Point Cloud | |
| Points | 1,056,813 of 1,348,718 |
| RMS reprojection error | 0.345188 (0.803884 pix) |
| Max reprojection error | 1.91809 (36.5603 pix) |
| Mean key point size | 1.95224 pix |
| Point colors | 3 bands, uint8 |
| Key points | No |
| Average tie point multiplicity | 5.78557 |
| Alignment parameters | |
| Accuracy | Highest |
| Generic preselection | Yes |
| Reference preselection | Source |
| Key point limit | 40,000 |
| Tie point limit | 4,000 |
| Exclude stationary tie points | Yes |
| Guided image matching | No |
| Adaptive camera model fitting | Yes |
| Matching time | 19 minutes 36 seconds |
| Matching memory usage | 2.06 GB |
| Alignment time | 32 minutes 35 seconds |
| Alignment memory usage | 772.86 MB |
| Optimization parameters | |
| Parameters | f, cx, cy, k1-k3, p1, p2 |
| Adaptive camera model fitting | Yes |
| Optimization time | 24 seconds |
| Software version | 1.7.0.11736 |
| File size | 147.34 MB |
| Dense Point Cloud | |
| Points | 486,128,308 |
| Point colors | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Mild |
| Max neighbors | 100 |
| Processing time | 1 hours 53 minutes |
| Memory usage | 8.40 GB |
| Dense cloud generation parameters | |
| Processing time | 7 hours 54 minutes |
| Memory usage | 16.69 GB |
| Software version | 1.7.0.11736 |
| File size | 17.01 GB |
| Model | |
| Faces | 96,768,626 |
| Vertices | 48,416,538 |
| Vertex colors | 3 bands, uint8 |
| Texture | 4,096 x 4,096 x 10, 4 bands, uint8 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Mild |
| Max neighbors | 100 |
| Processing time | 1 hours 53 minutes |
| Memory usage | 8.40 GB |
| Reconstruction parameters | |
| Surface type | Arbitrary |
| Source data | Dense cloud |
| Interpolation | Enabled |
| Strict volumetric masks | No |
| Processing time | 1 hours 28 minutes |
| Memory usage | 84.49 GB |
| Texturing parameters | |
| Mapping mode | Generic |
| Blending mode | Mosaic |
| Texture size | 4,096 |
| Enable hole filling | Yes |
| Enable ghosting filter | Yes |
| UV mapping time | 5 minutes 34 seconds |
| UV mapping memory usage | 15.17 GB |
| Blending time | 4 hours 0 minutes |
| Blending memory usage | 34.85 GB |
| Software version | 1.7.0.11736 |
| File size | 4.27 GB |
| Tiled Model | |
| Texture | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | High |
| Filtering mode | Mild |
| Max neighbors | 100 |
| Processing time | 1 hours 53 minutes |
| Memory usage | 8.40 GB |
| Reconstruction parameters | |
| Source data | Dense cloud |
| Tile size | 128 |
| Face count | Low |
| Enable ghosting filter | No |
| Processing time | 6 hours 47 minutes |
| Memory usage | 23.43 GB |
| Software version | 1.7.1.11797 |
| File size | 376.37 MB |
| System | |
| Software name | Agisoft Metashape Professional |
| Software version | 1.7.2 build 12040 |
| OS | Windows 64 bit |
| RAM | 127.71 GB |
| CPU | Intel(R) Xeon(R) Gold 5122 CPU @ 3.60GHz |
| GPU(s) | Quadro P5000 |