Lundgrenfjellet

Filter Component Size: 99% Decimated at 5000000 points

24 February 2022

Survey Data

1 2 3 4 5 6 7 8 9 > 9 1 km

Fig. 1. Camera locations and image overlap.

Number of images: 100 Flying altitude: 695 m Ground resolution: 6.59 cm/pix Coverage area: 1.44 km² Camera stations: 100 Tie points: 187,341 Projections: 745,948 Reprojection error: 0.337 pix
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

1 pix

Fig. 2. Image residuals for NIKON D800 (50mm).

NIKON D800 (50mm)

100 images

Type Resolution Focal Length Pixel Size Frame 4924 x 7374 50 mm 4.88 x 4.88 μm
Value Error F B1 B2 K1 K2 K3 P1 P2
F 10562.2 0.33 1.00 -0.90 -0.17 0.01 0.06 -0.04 -0.19 0.02
B1 4.45536 0.29 1.00 0.13 -0.01 -0.04 0.02 0.20 0.06
B2 -17.9857 0.23 1.00 -0.01 0.01 -0.02 -0.50 0.19
K1 -0.110067 5.1e-05 1.00 -0.95 0.89 0.01 -0.02
K2 0.0840239 0.00068 1.00 -0.98 -0.00 -0.00
K3 0.156584 0.0027 1.00 0.00 -0.01
P1 0.000166092 2.8e-06 1.00 -0.09
P2 0.000362246 3.9e-06 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

1 km -40 m -32 m -24 m -16 m -8 m 0 m 8 m 16 m 24 m 32 m 40 m x 4

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)
12.9971 13.3106 25.8273 18.6037 31.83

Table 3. Average camera location error.

X - Easting, Y - Northing, Z - Altitude.

Digital Elevation Model

0.44 km 1.05 km 1 km

Fig. 4. Reconstructed digital elevation model.

Resolution: 77.6 cm/pix Point density: 1.66 points/m²

Processing Parameters

General
Cameras 100
Aligned cameras 100
Coordinate system WGS 84 / UTM zone 33N (EPSG::32633)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 187,341 of 212,384
RMS reprojection error 0.128259 (0.337492 pix)
Max reprojection error 0.390009 (19.9952 pix)
Mean key point size 2.50991 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 4.00172
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 27 seconds
Matching memory usage 2.06 GB
Alignment time 22 seconds
Alignment memory usage 175.01 MB
Software version 1.6.4.10928
File size 17.88 MB
Depth Maps
Count 100
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 13 minutes 7 seconds
Memory usage 6.43 GB
Software version 1.6.4.10928
File size 737.95 MB
Dense Point Cloud
Points 137,381,469
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 13 minutes 7 seconds
Memory usage 6.43 GB
Dense cloud generation parameters
Processing time 10 minutes 13 seconds
Memory usage 12.38 GB
Software version 1.6.4.10928
File size 3.39 GB
Model
Faces 4,999,999
Vertices 2,503,519
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 2 minutes 3 seconds
UV mapping memory usage 3.89 GB
Blending time 1 minutes 39 seconds
Blending memory usage 5.84 GB
File size 417.24 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 13 minutes 7 seconds
Memory usage 6.43 GB
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count Medium
Enable ghosting filter No
Processing time 1 hours 27 minutes
Memory usage 4.66 GB
Software version 1.7.2.12040
File size 805.71 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) i9-10900 CPU @ 2.80GHz
GPU(s) NVIDIA GeForce RTX 2080 SUPER