Mefjellet

Connected component size 99%

24 February 2022

Survey Data

1 2 3 4 5 6 7 8 9 > 9 500 m

Fig. 1. Camera locations and image overlap.

Number of images: 40 Flying altitude: 462 m Ground resolution: 4.55 cm/pix Coverage area: 0.998 km² Camera stations: 40 Tie points: 100,303 Projections: 307,368 Reprojection error: 0.298 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

0.673938 pix

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

NIKON D800 (50mm)

40 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 10549.2 0.63 1.00 -0.76 0.30 0.06 0.07 -0.04 -0.04 -0.18
B1 24.6775 0.52 1.00 -0.14 -0.02 -0.02 0.01 -0.10 0.23
B2 -23.2468 0.47 1.00 0.03 0.01 -0.02 -0.35 0.02
K1 -0.109129 8.2e-05 1.00 -0.92 0.86 0.01 -0.03
K2 0.0778475 0.001 1.00 -0.98 -0.07 -0.05
K3 0.178184 0.004 1.00 0.06 0.02
P1 0.000367804 7.8e-06 1.00 0.38
P2 0.000380827 1e-05 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

500 m -20 m -16 m -12 m -8 m -4 m 0 m 4 m 8 m 12 m 16 m 20 m x 5

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)
6.28389 6.0606 9.81139 8.7303 13.1332

Table 3. Average camera location error.

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

Digital Elevation Model

630 m 980 m 500 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 2.35 m/pix Point density: 0.182 points/m²

Processing Parameters

General
Cameras 40
Aligned cameras 40
Coordinate system WGS 84 / UTM zone 33N (EPSG::32633)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 100,303 of 106,807
RMS reprojection error 0.106852 (0.298416 pix)
Max reprojection error 0.321651 (8.96303 pix)
Mean key point size 2.5811 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 3.08361
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 21 seconds
Matching memory usage 1.57 GB
Alignment time 30 seconds
Alignment memory usage 93.10 MB
Software version 1.6.4.10928
File size 7.63 MB
Depth Maps
Count 40
Depth maps generation parameters
Quality Ultra High
Filtering mode Aggressive
Processing time 21 minutes 15 seconds
File size 1.19 GB
Dense Point Cloud
Points 702,181,605
Point colors 3 bands, uint8
Depth maps generation parameters
Quality Ultra High
Filtering mode Aggressive
Processing time 21 minutes 15 seconds
Dense cloud generation parameters
Max neighbors 20
Processing time 30 minutes 37 seconds
Memory usage 13.38 GB
Software version 1.6.4.10928
File size 10.03 GB
Model
Faces 300,000
Vertices 152,726
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 3 minutes 43 seconds
UV mapping memory usage 3.31 GB
Blending time 2 minutes 47 seconds
Blending memory usage 5.92 GB
File size 225.29 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality Ultra High
Filtering mode Aggressive
Processing time 21 minutes 15 seconds
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count Medium
Enable ghosting filter No
Processing time 8 hours 1 minutes
Memory usage 14.54 GB
Software version 1.7.2.12040
File size 970.28 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