Processing Report

Reconstruction uncertainty: level 15 Projection accuracy: level 2 Reprojection error: level 0.3 (7x)

13 April 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: 5,512 Flying altitude: 29.8 m Ground resolution: 8.02 mm/pix Coverage area: 0.12 km² Camera stations: 5,495 Tie points: 6,323,579 Projections: 16,067,292 Reprojection error: 0.166 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)

5512 images

Type Resolution Focal Length Pixel Size Frame 5472 x 3648 10.26 mm 2.41 x 2.41 μm
F: Cx: B1: Cy: B2: K1: P1: K2: P2: K3: P3: K4: P4: 4344.39 3.54683 -47.5331 0.00451769 0.0296887 -0.0307009 0 0 0 -0.000404796 -0.00356967 0 0

Ground Control Points

1 15 13 3 10 7 12 11 9 2 4 5 14 8 6 -70 cm -56 cm -42 cm -28 cm -14 cm 0 cm 14 cm 28 cm 42 cm 56 cm 70 cm x 300 Control points Check points 100 m

Fig. 3. GCP locations and error estimates.

Z error is represented by ellipse color. X,Y errors are represented by ellipse shape.

Estimated GCP locations are marked with a dot or crossing.

Count X error (cm) Y error (cm) Z error (cm) XY error (cm) Total (cm)
10 2.95077 6.39074 21.7963 7.03908 22.9048

Table 2. Control points RMSE.

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

Count X error (cm) Y error (cm) Z error (cm) XY error (cm) Total (cm)
5 1.94746 1.3284 5.17477 2.35738 5.68643

Table 3. Check points RMSE.

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

Label X error (cm) Y error (cm) Z error (cm) Total (cm) Image (pix)
1 6.24641 1.49826 0.821396 6.47589 0.669 (88)
15 6.50712 -19.2725 18.8432 27.7279 0.971 (83)
3 -0.0530677 -0.429673 -0.266215 0.508238 0.830 (88)
10 -0.117515 0.187773 3.32966 3.33702 0.641 (61)
7 0.0918951 0.956963 -2.17939 2.382 1.015 (70)
12 0.0796224 -0.756592 -0.225821 0.793579 1.042 (74)
11 0.35141 0.531085 -4.52921 4.57376 0.861 (60)
2 1.75402 -5.69951 -65.9802 66.2492 0.646 (115)
4 -1.56628 -0.422968 -1.43887 2.16852 0.810 (58)
14 -0.159644 0.299842 -1.76756 1.79991 0.882 (48)
Total 2.95077 6.39074 21.7963 22.9048 0.838

Table 4. Control points.

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

Label X error (cm) Y error (cm) Z error (cm) Total (cm) Image (pix)
13 1.79602 0.963474 -7.85833 8.11833 1.147 (56)
9 -0.501536 -0.41094 -1.14219 1.31339 0.891 (81)
5 -3.39599 2.11392 3.62585 5.39891 0.869 (104)
8 -0.460186 1.76643 5.2993 5.60488 1.043 (113)
6 1.93424 -0.3703 -5.44096 5.7864 1.033 (68)
Total 1.94746 1.3284 5.17477 5.68643 0.988

Table 5. Check points.

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

Digital Elevation Model

80 m 260 m 100 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 1.6 cm/pix Point density: 0.389 points/cm²

Processing Parameters

General
Cameras 5512
Aligned cameras 5495
Markers 17
Shapes
LineString 8088
Polygon 2
Coordinate system WGS 84 (EPSG::4978)
Coordinate system WGS 84 (EPSG::4326)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 6,323,579 of 34,499,695
RMS reprojection error 0.122117 (0.165761 pix)
Max reprojection error 0.882934 (2.54686 pix)
Mean key point size 1.33458 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 3.81266
Alignment parameters
Accuracy Highest
Generic preselection Yes
Reference preselection No
Key point limit 60,000
Tie point limit 0
Exclude stationary tie points Yes
Guided image matching No
Adaptive camera model fitting No
Matching time 11 hours 3 minutes
Matching memory usage 10.34 GB
Alignment time 14 hours 15 minutes
Alignment memory usage 17.18 GB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting No
Optimization time 2 minutes 12 seconds
Software version 1.7.2.12040
File size 2.20 GB
Depth Maps
Count 5455
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 6 hours 12 minutes
Memory usage 4.93 GB
Software version 1.7.2.12040
File size 40.29 GB
Dense Point Cloud
Points 508,143,950
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 6 hours 12 minutes
Memory usage 4.93 GB
Dense cloud generation parameters
Processing time 2 days 13 hours
Memory usage 47.55 GB
Software version 1.7.2.12040
File size 22.43 GB
Model
Faces 4,987,136
Vertices 2,510,331
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
Processing time 6 hours 12 minutes
Memory usage 4.93 GB
Reconstruction parameters
Surface type Arbitrary
Source data Dense cloud
Interpolation Enabled
Strict volumetric masks No
Processing time 3 hours 50 minutes
Memory usage 119.42 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 3 seconds
UV mapping memory usage 3.88 GB
Blending time 1 hours 16 minutes
Blending memory usage 6.39 GB
Software version 1.7.2.12040
File size 518.70 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 6 hours 12 minutes
Memory usage 4.93 GB
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count High
Enable ghosting filter No
Processing time 1 days 13 hours
Memory usage 14.82 GB
Software version 1.7.2.12040
File size 9.07 GB
DEM
Size 34,712 x 53,486
Coordinate system WGS 84 / UTM zone 33N (EPSG::32633)
Reconstruction parameters
Source data Dense cloud
Interpolation Disabled
Processing time 25 minutes 7 seconds
Memory usage 354.53 MB
Software version 1.7.2.12040
File size 1.54 GB
Orthomosaic
Size 42,343 x 14,355
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 11 hours 9 minutes
Memory usage 17.72 GB
Software version 1.7.2.12040
File size 33.55 GB
System
Software name Agisoft Metashape Professional
Software version 1.7.2 build 12040
OS Windows 64 bit
RAM 33.08 GB
CPU Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz
GPU(s) None