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Processing Report

10 May 2022

Survey Data

1 2 3 4 5 6 7 8 9 > 9 20 m

Fig. 1. Camera locations and image overlap.

Number of images: 807 Flying altitude: 3.94 m Ground resolution: 1.35 mm/pix Coverage area: 1.04e+03 m² Camera stations: 791 Tie points: 191,450 Projections: 437,233 Reprojection error: 0.22 pix
Camera Model Resolution Focal Length Pixel Size Precalibrated
iPhone 6, iPhone 6 back camera 4.15mm f/2.2 (4.15mm) 3264 x 2448 4.15 mm 1.52 x 1.52 μm No

Table 1. Cameras.

Camera Calibration

1 pix

Fig. 2. Image residuals for iPhone 6, iPhone 6 back camera 4.15mm f/2.2 (4.15mm).

iPhone 6, iPhone 6 back camera 4.15mm f/2.2 (4.15mm)

807 images

Type Resolution Focal Length Pixel Size Frame 3264 x 2448 4.15 mm 1.52 x 1.52 μm
F: Cx: B1: Cy: B2: K1: P1: K2: P2: K3: P3: K4: P4: 2766.82 8.19511 -14.7574 0.0701672 -0.0431121 -0.106439 0 0 0 0.000185071 -0.000481449 0 0

Camera Locations

20 m -2.5 m -2 m -1.5 m -1 m -0.5 m 0 m 0.5 m 1 m 1.5 m 2 m 2.5 m x 1.5

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)
2.10751 1.24067 0.778763 2.44558 2.56658

Table 2. Average camera location error.

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

Digital Elevation Model

200 m 257 m 20 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 8.89 mm/pix Point density: 1.26 points/cm²

Processing Parameters

General
Cameras 807
Aligned cameras 791
Coordinate system WGS 84 (EPSG::4326)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 191,450 of 3,122,318
RMS reprojection error 0.150032 (0.219586 pix)
Max reprojection error 0.61876 (1.11964 pix)
Mean key point size 1.42867 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 3.10802
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 9 minutes 4 seconds
Matching memory usage 1.16 GB
Alignment time 5 minutes 46 seconds
Alignment memory usage 847.59 MB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting No
Optimization time 29 seconds
Software version 1.7.2.12040
File size 161.50 MB
Depth Maps
Count 625
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 12 minutes 58 seconds
Memory usage 1.07 GB
Software version 1.7.2.12040
File size 1.67 GB
Dense Point Cloud
Points 105,629,983
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 12 minutes 58 seconds
Memory usage 1.07 GB
Dense cloud generation parameters
Processing time 58 minutes 5 seconds
Memory usage 6.13 GB
Software version 1.7.2.12040
File size 2.36 GB
Model
Faces 21,125,996
Vertices 10,572,420
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 12 minutes 58 seconds
Memory usage 1.07 GB
Reconstruction parameters
Surface type Arbitrary
Source data Dense cloud
Interpolation Enabled
Strict volumetric masks No
Processing time 15 minutes 51 seconds
Memory usage 7.78 GB
Texturing parameters
Mapping mode Generic
Blending mode Mosaic
Texture size 4,096
Enable hole filling Yes
Enable ghosting filter Yes
UV mapping time 5 minutes 38 seconds
UV mapping memory usage 4.97 GB
Blending time 15 minutes 14 seconds
Blending memory usage 8.52 GB
Software version 1.7.2.12040
File size 1.06 GB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Processing time 12 minutes 58 seconds
Memory usage 1.07 GB
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count High
Enable ghosting filter No
Processing time 2 hours 50 minutes
Memory usage 5.50 GB
Software version 1.7.2.12040
File size 2.44 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