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VHC Gas Station
Progress Report
19 December 2019
Survey Data
1
2
3
4
5
6
7
8
9
> 9
50 m
Fig. 1. Camera locations and image overlap.
Number of images: 82
Flying altitude: 68.1 m
Ground resolution: 1.82 cm/pix
Coverage area: 0.0459 km²
Camera stations: 82
Tie points: 37,081
Projections: 153,220
Reprojection error: 0.922 pix
Camera Model Resolution Focal Length Pixel Size Precalibrated
FC6310 (8.8 mm) 4864 x 3648 8.8 mm 2.61 x 2.61 μm No
Table 1. Cameras.
Camera Calibration
1 pix
Fig. 2. Image residuals for FC6310 (8.8 mm).
FC6310 (8.8 mm)
82 images
Type Resolution Focal Length Pixel Size
Frame 4864 x 3648 8.8 mm 2.61 x 2.61 μm
Value Error P1 P2
F 3372.58
P1 -0.000393745 6.2e-006 1.00 -0.03
P2 -0.000823451 6.4e-006 1.00
Table 2. Calibration coefficients and correlation matrix.
Ground Control Points
B1
B2
B3
B4
B5
-20 cm
-16 cm
-12 cm
-8 cm
-4 cm
0 cm
4 cm
8 cm
12 cm
16 cm
20 cm
x 300
Control points Check points
50 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)
5 2.14035 1.45301 12.6806 2.58695 12.9417
Table 3. Control points RMSE.
X - Easting, Y - Northing, Z - Altitude.
Label X error (cm) Y error (cm) Z error (cm) Total (cm) Image (pix)
B1 0.611024 -2.27288 -15.0781 15.2607 0.622 (7)
B2 -2.68352 0.695733 18.8062 19.0094 1.013 (12)
B3 2.91854 1.41832 -9.57428 10.1092 0.583 (11)
B4 -2.21485 -0.933666 -5.08037 5.62027 0.558 (8)
B5 1.38108 1.42225 10.2705 10.4601 0.260 (8)
Total 2.14035 1.45301 12.6806 12.9417 0.688
Table 4. Control points.
X - Easting, Y - Northing, Z - Altitude.
Digital Elevation Model
-60 m
210 m
50 m
Fig. 4. Reconstructed digital elevation model.
Resolution: 7.26 cm/pix
Point density: 190 points/m²
Processing Parameters
General
Cameras 82
Aligned cameras 82
Markers 6
Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 37,081 of 40,503
RMS reprojection error 0.151514 (0.922371 pix)
Max reprojection error 0.456324 (31.8877 pix)
Mean key point size 5.56055 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 4.28472
Alignment parameters
Accuracy Medium
Generic preselection Yes
Reference preselection Yes
Key point limit 20,000
Tie point limit 2,000
Adaptive camera model fitting Yes
Matching time 9 minutes 49 seconds
Alignment time 27 seconds
Dense Point Cloud
Points 15,050,120
Point colors 3 bands, uint8
Depth maps generation parameters
Quality Medium
Filtering mode Aggressive
Processing time 1 hours 8 minutes
Dense cloud generation parameters
Processing time 4 minutes 44 seconds
Model
Faces 981,865
Vertices 493,159
Vertex colors 3 bands, uint8
Depth maps generation parameters
Quality Medium
Filtering mode Aggressive
Reconstruction parameters
Surface type Height field
Source data Dense cloud
Interpolation Enabled
Processing time 58 seconds
DEM
Size 5,087 x 5,337
Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367)
Reconstruction parameters
Source data Dense cloud
Interpolation Enabled
Processing time 1 minutes 27 seconds
General
Orthomosaic
Size 17,747 x 19,275
Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367)
Colors 3 bands, uint8
Reconstruction parameters
Blending mode Mosaic
Surface DEM
Enable hole filling Yes
Processing time 7 minutes 58 seconds
Software
Version 1.5.3 build 8407
Platform Windows 64

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Progress report

  • 1. VHC Gas Station Progress Report 19 December 2019
  • 2. Survey Data 1 2 3 4 5 6 7 8 9 > 9 50 m Fig. 1. Camera locations and image overlap. Number of images: 82 Flying altitude: 68.1 m Ground resolution: 1.82 cm/pix Coverage area: 0.0459 km² Camera stations: 82 Tie points: 37,081 Projections: 153,220 Reprojection error: 0.922 pix Camera Model Resolution Focal Length Pixel Size Precalibrated FC6310 (8.8 mm) 4864 x 3648 8.8 mm 2.61 x 2.61 μm No Table 1. Cameras.
  • 3. Camera Calibration 1 pix Fig. 2. Image residuals for FC6310 (8.8 mm). FC6310 (8.8 mm) 82 images Type Resolution Focal Length Pixel Size Frame 4864 x 3648 8.8 mm 2.61 x 2.61 μm Value Error P1 P2 F 3372.58 P1 -0.000393745 6.2e-006 1.00 -0.03 P2 -0.000823451 6.4e-006 1.00 Table 2. Calibration coefficients and correlation matrix.
  • 4. Ground Control Points B1 B2 B3 B4 B5 -20 cm -16 cm -12 cm -8 cm -4 cm 0 cm 4 cm 8 cm 12 cm 16 cm 20 cm x 300 Control points Check points 50 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) 5 2.14035 1.45301 12.6806 2.58695 12.9417 Table 3. Control points RMSE. X - Easting, Y - Northing, Z - Altitude.
  • 5. Label X error (cm) Y error (cm) Z error (cm) Total (cm) Image (pix) B1 0.611024 -2.27288 -15.0781 15.2607 0.622 (7) B2 -2.68352 0.695733 18.8062 19.0094 1.013 (12) B3 2.91854 1.41832 -9.57428 10.1092 0.583 (11) B4 -2.21485 -0.933666 -5.08037 5.62027 0.558 (8) B5 1.38108 1.42225 10.2705 10.4601 0.260 (8) Total 2.14035 1.45301 12.6806 12.9417 0.688 Table 4. Control points. X - Easting, Y - Northing, Z - Altitude.
  • 6. Digital Elevation Model -60 m 210 m 50 m Fig. 4. Reconstructed digital elevation model. Resolution: 7.26 cm/pix Point density: 190 points/m²
  • 7. Processing Parameters General Cameras 82 Aligned cameras 82 Markers 6 Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367) Rotation angles Yaw, Pitch, Roll Point Cloud Points 37,081 of 40,503 RMS reprojection error 0.151514 (0.922371 pix) Max reprojection error 0.456324 (31.8877 pix) Mean key point size 5.56055 pix Point colors 3 bands, uint8 Key points No Average tie point multiplicity 4.28472 Alignment parameters Accuracy Medium Generic preselection Yes Reference preselection Yes Key point limit 20,000 Tie point limit 2,000 Adaptive camera model fitting Yes Matching time 9 minutes 49 seconds Alignment time 27 seconds Dense Point Cloud Points 15,050,120 Point colors 3 bands, uint8 Depth maps generation parameters Quality Medium Filtering mode Aggressive Processing time 1 hours 8 minutes Dense cloud generation parameters Processing time 4 minutes 44 seconds Model Faces 981,865 Vertices 493,159 Vertex colors 3 bands, uint8 Depth maps generation parameters Quality Medium Filtering mode Aggressive Reconstruction parameters Surface type Height field Source data Dense cloud Interpolation Enabled Processing time 58 seconds DEM Size 5,087 x 5,337 Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367) Reconstruction parameters Source data Dense cloud Interpolation Enabled Processing time 1 minutes 27 seconds
  • 8. General Orthomosaic Size 17,747 x 19,275 Coordinate system Mexico ITRF2008 / UTM zone 12N (EPSG::6367) Colors 3 bands, uint8 Reconstruction parameters Blending mode Mosaic Surface DEM Enable hole filling Yes Processing time 7 minutes 58 seconds Software Version 1.5.3 build 8407 Platform Windows 64