Piz Laviner - Err Detachment System

Processing Report Reconstruction uncertainty: 15 Projection Accuracy: 3 Reprojection Error: 0.3 Dense Cloud Confidence: 5-255 Mesh connected component size: 99%

23 December 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: 1,082 Flying altitude: 213 m Ground resolution: 6.82 cm/pix Coverage area: 1.96 km² Camera stations: 1,082 Tie points: 927,732 Projections: 2,244,042 Reprojection error: 0.308 pix
Camera Model Resolution Focal Length Pixel Size Precalibrated
L1D-20c (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 L1D-20c (10.26mm).

L1D-20c (10.26mm)
1082 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 K1 K2 K3 P1 P2
F 4326.07 0.022 1.00 0.03 -0.30 -0.31 0.30 -0.26 0.04 -0.15
Cx -17.2039 0.049 1.00 -0.01 -0.01 0.01 -0.01 0.95 -0.02
Cy -28.4554 0.037 1.00 0.00 -0.01 0.01 -0.02 0.65
K1 -0.00957282 2.9e-05 1.00 -0.96 0.89 -0.01 -0.06
K2 0.0469915 0.00012 1.00 -0.98 0.01 0.02
K3 -0.0534011 0.00015 1.00 -0.01 -0.02
P1 0.000455691 3.9e-06 1.00 -0.03
P2 -0.00256516 2e-06 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

500 m -45 cm -36 cm -27 cm -18 cm -9 cm 0 cm 9 cm 18 cm 27 cm 36 cm 45 cm x 300

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 (cm) Y error (cm) Z error (cm) XY error (cm) Total error (cm)
17.7225 14.4288 8.77425 22.8534 24.4799

Table 3. Average camera location error.

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

Digital Elevation Model

2.74 km 3.26 km 500 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 13.6 cm/pix Point density: 53.7 points/m²

Processing Parameters

General
Cameras 1082
Aligned cameras 1082
Coordinate system CH1903+ / LV95 (EPSG::2056)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 927,732 of 7,529,570
RMS reprojection error 0.188805 (0.307594 pix)
Max reprojection error 5.69039 (7.19352 pix)
Mean key point size 1.56737 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 3.65418
Alignment parameters
Accuracy Highest
Generic preselection Yes
Reference preselection Source
Key point limit 60,000
Key point limit per Mpx 1,000
Tie point limit 0
Filter points by mask Yes
Mask tie points No
Exclude stationary tie points Yes
Guided image matching No
Adaptive camera model fitting No
Matching time 1 hours 15 minutes
Matching memory usage 2.58 GB
Alignment time 44 minutes 36 seconds
Alignment memory usage 2.68 GB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting No
Optimization time 1 minutes 30 seconds
Date created 2022:09:24 10:51:13
Software version 1.8.4.14856
File size 462.75 MB
Depth Maps
Count 1070
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 16
Processing time 1 hours 46 minutes
Memory usage 4.07 GB
Date created 2022:09:24 12:48:34
Software version 1.8.4.14856
File size 7.23 GB
Dense Point Cloud
Points 168,743,451
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 16
Processing time 1 hours 46 minutes
Memory usage 4.07 GB
Dense cloud generation parameters
Processing time 21 hours 38 minutes
Memory usage 26.41 GB
Date created 2022:09:24 18:17:54
Software version 1.8.4.14856
File size 8.67 GB
Model
Faces 35,201,783
Vertices 17,618,347
Vertex colors 3 bands, uint8
Texture 4,096 x 4,096 x 40, 4 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 16
Processing time 1 hours 46 minutes
Memory usage 4.07 GB
Reconstruction parameters
Surface type Arbitrary
Source data Dense cloud
Interpolation Disabled
Strict volumetric masks No
Processing time 1 hours 37 minutes
Memory usage 13.30 GB
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 24 seconds
UV mapping memory usage 6.50 GB
Blending time 1 hours 37 minutes
Blending memory usage 54.74 GB
Date created 2022:09:25 10:21:11
Software version 1.8.4.14856
File size 2.36 GB
Tiled Model
Texture 3 bands, uint8
Reconstruction parameters
Source data Mesh
Tile size 256
Face count High
Enable ghosting filter No
Processing time 5 hours 4 minutes
Memory usage 14.72 GB
Date created 2022:09:30 22:20:40
Software version 1.8.4.14856
File size 1.81 GB
Orthomosaic
Size 40,860 x 7,444
Coordinate system WGS 84 (EPSG::4978)
Colors 3 bands, uint8
Reconstruction parameters
Blending mode Mosaic
Surface Mesh
Enable hole filling Yes
Enable ghosting filter No
Processing time 2 hours 20 minutes
Memory usage 3.95 GB
Date created 2022:11:16 19:27:41
Software version 1.8.4.14856
File size 8.11 GB
System
Software name Agisoft Metashape Professional
Software version 1.8.4 build 14856
OS Windows 64 bit
RAM 127.71 GB
CPU Intel(R) Xeon(R) Gold 5122 CPU @ 3.60GHz
GPU(s) Quadro P5000