Aspelintoppen
Reconstruction uncertainty: 30 Projection accuracy: 3 Reprojection error: 0,3 Dense Cloud Confidence 2-255 Filter Component Size: 99%
02 March 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)
125 images
| Value | Error | F | Cx | Cy | K1 | K2 | K3 | P1 | P2 | |
| F | 10568.1 | 0.14 | 1.00 | 0.07 | -0.14 | -0.03 | 0.11 | -0.10 | 0.07 | -0.08 |
| Cx | 11.2114 | 0.26 | 1.00 | 0.09 | -0.01 | 0.04 | -0.03 | 0.86 | 0.06 | |
| Cy | 4.74682 | 0.14 | 1.00 | 0.02 | -0.07 | 0.08 | 0.02 | 0.15 | ||
| K1 | -0.109826 | 3e-05 | 1.00 | -0.94 | 0.87 | 0.02 | 0.04 | |||
| K2 | 0.0853644 | 0.00039 | 1.00 | -0.98 | 0.02 | -0.04 | ||||
| K3 | 0.14692 | 0.0016 | 1.00 | -0.01 | 0.03 | |||||
| P1 | 0.000171072 | 5.3e-06 | 1.00 | 0.14 | ||||||
| P2 | 0.000423572 | 2.4e-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) |
| 5.60157 | 13.0213 | 7.3602 | 14.1751 | 15.972 |
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 | 125 |
| Aligned cameras | 125 |
| Coordinate system | WGS 84 (EPSG::4326) |
| Rotation angles | Yaw, Pitch, Roll |
| Point Cloud | |
| Points | 680,809 of 849,827 |
| RMS reprojection error | 0.110772 (0.210674 pix) |
| Max reprojection error | 0.299998 (4.01098 pix) |
| Mean key point size | 1.86737 pix |
| Point colors | 3 bands, uint8 |
| Key points | No |
| Average tie point multiplicity | 2.65391 |
| Alignment parameters | |
| Accuracy | Highest |
| Generic preselection | Yes |
| Reference preselection | No |
| Key point limit | 60,000 |
| Tie point limit | 0 |
| Exclude stationary tie points | Yes |
| Guided image matching | No |
| Adaptive camera model fitting | No |
| Matching time | 9 minutes 56 seconds |
| Matching memory usage | 461.02 MB |
| Alignment time | 2 minutes 44 seconds |
| Alignment memory usage | 220.91 MB |
| Optimization parameters | |
| Parameters | f, cx, cy, k1-k3, p1, p2 |
| Adaptive camera model fitting | No |
| Optimization time | 5 seconds |
| Software version | 1.7.2.12040 |
| File size | 52.44 MB |
| Depth Maps | |
| Count | 125 |
| Depth maps generation parameters | |
| Quality | Medium |
| Filtering mode | Mild |
| Processing time | 5 minutes 43 seconds |
| Memory usage | 1.05 GB |
| Software version | 1.7.2.12040 |
| File size | 355.85 MB |
| Dense Point Cloud | |
| Points | 101,985,721 |
| Point colors | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | Medium |
| Filtering mode | Mild |
| Processing time | 5 minutes 43 seconds |
| Memory usage | 1.05 GB |
| Dense cloud generation parameters | |
| Processing time | 39 minutes 35 seconds |
| Memory usage | 4.32 GB |
| Software version | 1.7.2.12040 |
| File size | 1.74 GB |
| Model | |
| Faces | 5,429,627 |
| Vertices | 2,726,764 |
| Vertex colors | 3 bands, uint8 |
| Texture | 4,096 x 4,096 x 10, 4 bands, uint8 |
| Depth maps generation parameters | |
| Quality | Medium |
| Filtering mode | Mild |
| Processing time | 5 minutes 43 seconds |
| Memory usage | 1.05 GB |
| Reconstruction parameters | |
| Surface type | Arbitrary |
| Source data | Dense cloud |
| Interpolation | Enabled |
| Strict volumetric masks | No |
| Processing time | 33 minutes 31 seconds |
| Memory usage | 45.87 GB |
| 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 5 seconds |
| UV mapping memory usage | 3.75 GB |
| Blending time | 5 minutes 30 seconds |
| Blending memory usage | 7.02 GB |
| Software version | 1.7.2.12040 |
| File size | 500.25 MB |
| Tiled Model | |
| Texture | 3 bands, uint8 |
| Depth maps generation parameters | |
| Quality | Medium |
| Filtering mode | Mild |
| Processing time | 5 minutes 43 seconds |
| Memory usage | 1.05 GB |
| Reconstruction parameters | |
| Source data | Dense cloud |
| Tile size | 256 |
| Face count | Medium |
| Enable ghosting filter | No |
| Processing time | 2 hours 41 minutes |
| Memory usage | 7.06 GB |
| Software version | 1.7.2.12040 |
| File size | 2.67 GB |
| 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) i9-10900 CPU @ 2.80GHz |
| GPU(s) | NVIDIA GeForce RTX 2080 SUPER |