Grønfjordbreane

Filtering: Dense cloud: 5-255 Connected mesh: 99%

19 February 2022

Survey Data

1 2 3 4 5 6 7 8 9 > 9 100 m

Fig. 1. Camera locations and image overlap.

Number of images: 428 Flying altitude: 121 m Ground resolution: 2.24 cm/pix Coverage area: 0.019 km² Camera stations: 428 Tie points: 116,516 Projections: 1,122,493 Reprojection error: 0.673 pix
Camera Model Resolution Focal Length Pixel Size Precalibrated
Test_Pro (10.26mm) 5472 x 3648 10.26 mm 2.41 x 2.41 μm No

Table 1. Cameras.

Camera Calibration

1 pix

Fig. 2. Image residuals for Test_Pro (10.26mm).

Test_Pro (10.26mm)

428 images

Type Resolution Focal Length Pixel Size Frame 5472 x 3648 10.26 mm 2.41 x 2.41 μm
Value Error F Cx Cy B1 B2 K1 K2 K3 P1 P2
F 4348.92 0.029 1.00 0.09 -0.10 -0.59 -0.00 -0.08 0.16 -0.14 0.06 -0.16
Cx 6.67387 0.054 1.00 -0.21 -0.17 0.13 0.01 0.03 -0.03 0.95 -0.20
Cy -51.4341 0.049 1.00 -0.11 -0.16 -0.07 0.03 -0.02 -0.19 0.91
B1 3.19852 0.024 1.00 -0.03 -0.05 0.04 -0.04 -0.15 0.02
B2 3.64771 0.022 1.00 0.03 -0.01 -0.00 0.03 -0.10
K1 0.00595936 2.3e-05 1.00 -0.95 0.89 0.00 -0.09
K2 0.0405716 9.7e-05 1.00 -0.98 0.02 0.04
K3 -0.045073 0.00013 1.00 -0.02 -0.03
P1 -0.0002071 3.7e-06 1.00 -0.19
P2 -0.00375004 3.1e-06 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

100 m -6 m -4.8 m -3.6 m -2.4 m -1.2 m 0 m 1.2 m 2.4 m 3.6 m 4.8 m 6 m x 15

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)
0.440366 0.821582 1.90036 0.932158 2.11667

Table 3. Average camera location error.

X - Longitude, Y - Latitude, Z - Altitude.

Digital Elevation Model

310 m 450 m 100 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 4.47 cm/pix Point density: 500 points/m²

Processing Parameters

General
Cameras 428
Aligned cameras 428
Coordinate system WGS 84 (EPSG::4326)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 116,516 of 160,651
RMS reprojection error 0.261584 (0.672694 pix)
Max reprojection error 1.08363 (24.1755 pix)
Mean key point size 2.44018 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 12.3084
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 5 minutes 39 seconds
Matching memory usage 650.49 MB
Alignment time 3 minutes 50 seconds
Alignment memory usage 464.55 MB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting Yes
Optimization time 10 seconds
Software version 1.7.3.12473
File size 33.35 MB
Depth Maps
Count 428
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 39 minutes 46 seconds
Memory usage 12.24 GB
Software version 1.7.3.12473
File size 2.51 GB
Dense Point Cloud
Points 23,319,214
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 39 minutes 46 seconds
Memory usage 12.24 GB
Dense cloud generation parameters
Processing time 2 hours 32 minutes
Memory usage 26.40 GB
Software version 1.7.3.12473
File size 510.91 MB
Model
Faces 1,456,183
Vertices 735,181
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 39 minutes 46 seconds
Memory usage 12.24 GB
Reconstruction parameters
Surface type Arbitrary
Source data Dense cloud
Interpolation Enabled
Strict volumetric masks No
Processing time 8 minutes 43 seconds
Memory usage 11.90 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 4 seconds
UV mapping memory usage 3.10 GB
Blending time 3 minutes 39 seconds
Blending memory usage 5.03 GB
Software version 1.7.2.12040
File size 269.45 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 39 minutes 46 seconds
Memory usage 12.24 GB
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count Medium
Enable ghosting filter No
Processing time 28 minutes 5 seconds
Memory usage 2.61 GB
Software version 1.7.2.12040
File size 129.59 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