Sebulu Photogrammetry Project
Processing Report
10 July 2024
Survey Data
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200 m
Fig. 1. Camera locations and image overlap.
Number of images: 707 Camera stations: 690
Flying altitude: 79.7 m Tie points: 1,317,291
Ground resolution: 1.84 cm/pix Projections: 3,409,499
Coverage area: 0.248 km² Reprojection error: 0.615 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.
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Camera Calibration
1 pix
Fig. 2. Image residuals for Test_Pro (10.26mm).
Test_Pro (10.26mm)
707 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 K4 P1 P2
F 4330.98 0.18 1.00 -0.24 -0.91 0.65 -0.19 -0.01 0.04 -0.03 0.01 -0.03 -0.12
Cx 16.3898 0.044 1.00 0.18 -0.06 0.84 -0.01 -0.00 0.00 0.00 0.34 0.04
Cy -36.0346 0.14 1.00 -0.88 0.18 -0.00 -0.00 -0.00 0.01 0.01 0.08
B1 -14.2695 0.025 1.00 -0.10 -0.05 -0.00 0.01 -0.01 0.02 0.19
B2 -0.16684 0.015 1.00 0.02 -0.01 0.00 0.00 -0.09 -0.04
K1 -0.0086464 3.5e-05 1.00 -0.94 0.89 -0.84 -0.06 -0.16
K2 -0.0060122 0.00022 1.00 -0.98 0.95 0.01 -0.00
K3 0.0270907 0.00057 1.00 -0.99 -0.01 0.01
K4 -0.0331533 0.0005 1.00 0.01 -0.00
P1 0.000135519 1.5e-06 1.00 0.13
P2 -0.00110585 2e-06 1.00
Table 2. Calibration coefficients and correlation matrix.
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Ground Control Points
0.025 mm
0.02 mm
0.015 mm
0.01 mm
0.005 mm
0 mm
-0.005 mm
-0.01 mm
-0.015 mm
-0.02 mm
-0.025 mm
BM6
x 8000
BM8
BM7
Control points Check points
200 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 (mm) Y error (mm) Z error (mm) XY error (mm) Total (mm)
3 2.44919 0.881006 0.0194885 2.60283 2.6029
Table 3. Control points RMSE.
X - Easting, Y - Northing, Z - Altitude.
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Label X error (mm) Y error (mm) Z error (mm) Total (mm) Image (pix)
BM6 0.255166 0.291761 0.000911512 0.387601 1.862 (11)
BM7 -3.11907 -1.19489 0.0233996 3.34019 0.588 (17)
BM8 2.8639 0.903127 -0.0243112 3.00302 1.232 (15)
Total 2.44919 0.881006 0.0194885 2.6029 1.246
Table 4. Control points.
X - Easting, Y - Northing, Z - Altitude.
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Digital Elevation Model
350 m
90 m
200 m
Fig. 4. Reconstructed digital elevation model.
Resolution: 6.69 cm/pix
Point density: 223 points/m²
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Processing Parameters
General
Cameras 707
Aligned cameras 690
Markers 3
Coordinate system WGS 84 / UTM zone 49S (EPSG::32749)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 1,317,291 of 1,492,986
RMS reprojection error 0.186361 (0.615229 pix)
Max reprojection error 3.28279 (29.1189 pix)
Mean key point size 2.41824 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 2.82099
Alignment parameters
Accuracy Highest
Generic preselection Yes
Reference preselection Source
Key point limit 120,000
Key point limit per Mpx 1,000
Tie point limit 12,000
Exclude stationary tie points Yes
Guided image matching No
Adaptive camera model fitting Yes
Matching time 33 minutes 13 seconds
Matching memory usage 14.76 GB
Alignment time 11 minutes 5 seconds
Alignment memory usage 715.36 MB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting Yes
Optimization time 1 minutes 25 seconds
Date created 2024:07:08 10:43:57
Software version 1.7.5.13100
File size 98.78 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality Medium
Filtering mode Mild
Max neighbors 40
Processing time 7 minutes 36 seconds
Reconstruction parameters
Source data Dense cloud
Tile size 256
Face count Medium
Enable ghosting filter No
Processing time 1 hours 37 minutes
Memory usage 8.28 GB
Date created 2024:07:08 17:37:51
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Software version 1.7.5.13100
File size 2.57 GB
DEM
Size 20,537 x 8,046
Coordinate system WGS 84 (EPSG::4326)
Reconstruction parameters
Source data Dense cloud
Interpolation Enabled
Processing time 1 minutes 22 seconds
Memory usage 318.26 MB
Date created 2024:07:09 02:25:55
Software version 1.7.5.13100
File size 356.62 MB
System
Software name Agisoft Metashape Professional
Software version 1.7.5 build 13100
OS Windows 64 bit
RAM 31.73 GB
CPU 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
GPU(s) NVIDIA GeForce RTX 3060 Laptop GPU
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