Litledalsfjellet

Filter component size 99%

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: 80 Flying altitude: 649 m Ground resolution: 6.04 cm/pix Coverage area: 1.94 km² Camera stations: 80 Tie points: 170,113 Projections: 613,921 Reprojection error: 0.367 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)

80 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 10599.5 0.53 1.00 -0.66 0.07 0.08 0.09 -0.07 0.02 -0.07
B1 -24.7577 0.37 1.00 -0.08 -0.03 -0.04 0.03 0.06 0.28
B2 1.18618 0.33 1.00 0.00 0.01 -0.01 -0.26 0.06
K1 -0.108165 6.6e-05 1.00 -0.92 0.86 -0.00 -0.03
K2 0.0659833 0.00086 1.00 -0.98 -0.03 -0.02
K3 0.21571 0.0034 1.00 0.02 0.01
P1 0.000123869 6.6e-06 1.00 0.51
P2 0.000276087 7.6e-06 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

1 km -30 m -24 m -18 m -12 m -6 m 0 m 6 m 12 m 18 m 24 m 30 m x 10

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)
5.96955 7.12079 16.3195 9.29199 18.7794

Table 3. Average camera location error.

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

Digital Elevation Model

330 m 850 m 1 km

Fig. 4. Reconstructed digital elevation model.

Resolution: 92.9 cm/pix Point density: 1.16 points/m²

Processing Parameters

General
Cameras 80
Aligned cameras 80
Coordinate system WGS 84 / UTM zone 33N (EPSG::32633)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 170,113 of 181,263
RMS reprojection error 0.133004 (0.366555 pix)
Max reprojection error 0.402993 (11.5315 pix)
Mean key point size 2.50269 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 3.72131
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 22 seconds
Matching memory usage 1.73 GB
Alignment time 47 seconds
Alignment memory usage 104.85 MB
Software version 1.6.4.10928
File size 14.72 MB
Depth Maps
Count 80
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 7 minutes 18 seconds
Memory usage 4.46 GB
Software version 1.6.4.10928
File size 583.81 MB
Dense Point Cloud
Points 232,002,696
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 7 minutes 18 seconds
Memory usage 4.46 GB
Dense cloud generation parameters
Processing time 8 minutes 59 seconds
Memory usage 9.84 GB
Software version 1.6.4.10928
File size 3.25 GB
Model
Faces 3,989,482
Vertices 2,001,123
Vertex colors 3 bands, uint8
Texture 4,096 x 4,096 x 15, 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 54 seconds
UV mapping memory usage 7.66 GB
Blending time 1 minutes 59 seconds
Blending memory usage 8.80 GB
File size 518.37 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Aggressive
Processing time 7 minutes 18 seconds
Memory usage 4.46 GB
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count Medium
Enable ghosting filter No
Processing time 3 hours 39 minutes
Memory usage 5.23 GB
Software version 1.7.2.12040
File size 1.27 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) i9-9900K CPU @ 3.60GHz
GPU(s) GeForce RTX 2080