Full text
Sverrefjellet Disable images <0.6 quality Align Disable unaligned images Camera Optimization Reconstruction uncertainty: 10 Camera Optimization Projection accuracy: 3 Camera Optimization Reprojection error: 0.2 Camera Optimization Disable Unaligned Images Dense Cloud Confidence: >5 Connected component size 99% 13 December 2025
Page 2
Survey Data 1 2 3 4 5 6 7 8 9 > 9 20.0 m Fig. 1. Camera locations and image overlap. Number of images: 424 Flying altitude: 7.27 m Ground resolution: 1.69 mm/pix Coverage area: 7053 m² Camera stations: 412 Tie points: 250,043 Projections: 762,561 Reprojection error: 0.227 pix Camera Model Resolution Focal Length Pixel Size Precalibrated L2D-20c (12.29mm) 5280 x 3956 12.29 mm 3.36 x 3.36 μm No FC4382 (19.35mm) 4032 x 3024 19.35 mm 2.37 x 2.37 μm No Table 1. Cameras. Page 3
Camera Calibration 1 pix Fig. 2. Image residuals for L2D-20c (12.29mm). L2D-20c (12.29mm) 98 images Type Resolution Focal Length Pixel Size Frame 5280 x 3956 12.29 mm 3.36 x 3.36 μm Value Error F Cx Cy K1 K2 K3 P1 P2 F 3714.43 0.11 1.00 -0.09 -0.35 -0.06 0.07 -0.03 -0.09 -0.08 Cx 4.56728 0.1 1.00 0.02 0.00 -0.02 0.03 0.82 -0.03 Cy -29.6492 0.093 1.00 -0.01 0.00 -0.01 0.02 0.53 K1 0.0295543 5.7e-05 1.00 -0.94 0.89 -0.00 -0.05 K2 -0.0937799 0.00021 1.00 -0.98 -0.02 -0.01 K3 0.11549 0.00024 1.00 0.03 0.00 P1 -0.000180597 8.7e-06 1.00 -0.02 P2 -0.00106267 5.8e-06 1.00 Table 2. Calibration coefficients and correlation matrix. Page 4
Camera Calibration 1 pix Fig. 3. Image residuals for FC4382 (19.35mm). FC4382 (19.35mm) 326 images Type Resolution Focal Length Pixel Size Frame 4032 x 3024 19.35 mm 2.37 x 2.37 μm Value Error F Cx Cy K1 K2 K3 P1 P2 F 8094.16 0.26 1.00 -0.01 -0.09 -0.07 0.05 0.01 -0.03 -0.06 Cx 5.43102 0.16 1.00 -0.02 -0.03 0.03 -0.04 0.49 -0.02 Cy -16.8912 0.19 1.00 0.03 -0.02 0.00 -0.02 0.36 K1 -0.209255 0.00017 1.00 -0.96 0.90 -0.00 0.01 K2 0.47956 0.0044 1.00 -0.98 0.02 -0.01 K3 6.66176 0.034 1.00 -0.02 -0.00 P1 -8.43343e-05 5.7e-06 1.00 -0.01 P2 0.00051014 5.5e-06 1.00 Table 3. Calibration coefficients and correlation matrix. Page 5
Camera Locations 20.0 m -1.00 m -0.800 m -0.600 m -0.400 m -0.200 m 0 m 0.200 m 0.400 m 0.600 m 0.800 m 1.00 m x 5 Fig. 4. 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) 41.0636 35.566 24.8607 54.3246 59.7429 Table 4. Average camera location error. X - Longitude, Y - Latitude, Z - Altitude. Page 6
Digital Elevation Model 68.0 m 100 m 20.0 m Fig. 5. Reconstructed digital elevation model. Resolution: 8.09 cm/pix Point density: 153 points/m² Page 7
Processing Parameters General Images 424 Aligned images 412 Coordinate system WGS 84 (EPSG::4326) Rotation angles Yaw, Pitch, Roll Tie Points Points 250,043 of 2,857,744 RMS reprojection error 0.0958097 (0.226629 pix) Max reprojection error 0.509913 (1.35134 pix) Mean key point size 2.32767 pix Point colors 3 bands, uint8 Key points No Average tie point multiplicity 3.17432 Alignment parameters Accuracy High Generic preselection Yes Reference preselection Source Key point limit 60,000 Key point limit per Mpx 1,000 Tie point limit 0 Exclude stationary tie points Yes Guided image matching No Adaptive camera model fitting No Matching time 6 minutes 33 seconds Matching memory usage 964.46 MB Alignment time 23 minutes 10 seconds Alignment memory usage 833.40 MB Optimization parameters Parameters f, cx, cy, k1-k3, p1, p2 Adaptive camera model fitting No Exclude corners No Optimization time 11 seconds Date created 2025:11:05 15:19:53 Software version 2.2.1.20641 File size 152.37 MB Depth Maps Count 405 Depth maps generation parameters Quality High Filtering mode Mild Max neighbors 16 Processing time 21 minutes 47 seconds Memory usage 2.38 GB Date created 2025:11:05 16:28:06 Software version 2.2.1.20641 File size 2.07 GB Point Cloud Points 41,087,333 Coordinate precision 86.4 cm Point attributes Page 8
Color 3 bands, uint8 Normal Confidence 6 - 36 Point classes Created (never classified) 41,087,333 Depth maps generation parameters Quality High Filtering mode Mild Max neighbors 16 Processing time 21 minutes 47 seconds Memory usage 2.38 GB Point cloud generation parameters Source data Depth maps Processing time 1 hours 44 minutes Memory usage 9.53 GB Date created 2025:11:05 18:13:05 Software version 2.2.1.20641 File size 4.85 GB Model Faces 556,664 Vertices 279,592 Vertex colors 3 bands, uint8 Texture 4,096 x 4,096 x 11, 3 bands, uint8 Depth maps generation parameters Quality High Filtering mode Mild Max neighbors 16 Processing time 21 minutes 47 seconds Memory usage 2.38 GB Reconstruction parameters Surface type Arbitrary Source data Depth maps Interpolation Enabled Strict volumetric masks No Processing time 54 minutes 27 seconds Memory usage 9.77 GB Texturing parameters Mapping mode Generic Blending mode Mosaic Texture size 4,096 Pixel size (m) 0.01 Enable hole filling Yes Enable ghosting filter Yes UV mapping time 1 minutes 52 seconds UV mapping memory usage 500.18 MB Blending time 4 minutes 25 seconds Blending memory usage 5.78 GB Blending GPU memory usage 4.77 GB Date created 2025:11:17 20:43:37 Software version 2.2.1.20641 File size 215.27 MB System Software name Agisoft Metashape Professional Software version 2.2.1 build 20641 OS Windows 64 bit RAM 127.78 GB Page 9
