Agisoft PhotoScan Tareqh UAV PPK

18 March 2019

Survey Data

1

2

3

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7

8

9

> 9

100 m

Fig. 1. Camera locations and image overlap.

Number of images: 120

Flying altitude: 179 m

Ground resolution: 2.51 cm/pix

Coverage area: 0.0586 km²

Camera stations: 120

Tie points: 696,962

Projections: 2,115,053

Reprojection error: 0.502 pix

Camera Model Resolution Focal Length Pixel Size Precalibrated

X-A3 (27mm) 6000 x 4000 27 mm 3.91 x 3.91 μm Yes

Table 1. Cameras.

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Camera Calibration

1 pix

Fig. 2. Image residuals for X-A3 (27mm).

X-A3 (27mm)

120 images, rolling shutter, precalibrated

Type Resolution Focal Length Pixel SizeFrame 6000 x 4000 27 mm 3.91 x 3.91 μm

Value Error F Cx Cy B1 B2 K1 K2 K3 K4 P1 P2

F 7121.65 0.082 1.00 0.19 -0.48 -0.05 0.03 -0.14 0.14 -0.13 0.13 0.02 -0.07

Cx 18.2495 0.027 1.00 -0.09 0.02 0.01 -0.00 0.00 -0.01 0.01 0.83 -0.01

Cy 0.339939 0.03 1.00 -0.01 -0.00 0.01 -0.01 0.01 -0.01 -0.01 0.80

B1 -4.7743 0.016 1.00 -0.08 0.00 0.00 -0.00 0.00 0.01 -0.02

B2 -0.388808 0.018 1.00 -0.00 0.00 -0.00 0.00 0.03 0.00

K1 -0.076175 6.3e-005 1.00 -0.97 0.93 -0.88 0.01 -0.01

K2 0.664758 0.00095 1.00 -0.99 0.96 -0.00 0.01

K3 -3.60326 0.0057 1.00 -0.99 0.00 -0.01

K4 6.64292 0.012 1.00 -0.00 0.01

P1 0.0010259 1.3e-006 1.00 -0.00

P2 -0.000523135 1.4e-006 1.00

Table 2. Calibration coefficients and correlation matrix.

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Camera Locations

100 m

-6 cm

-4.8 cm

-3.6 cm

-2.4 cm

-1.2 cm

0 cm

1.2 cm

2.4 cm

3.6 cm

4.8 cm

6 cm

x 1000

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 (cm) Y error (cm) Z error (cm) XY error (cm) Total error (cm)

1.26172 0.33944 1.77279 1.30658 2.20226

Table 3. Average camera location error.

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

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Digital Elevation Model

1.6 km

1.61 km

100 m

Fig. 4. Reconstructed digital elevation model.

Resolution: unknown

Point density: unknown

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Processing Parameters

General Cameras 120 Aligned cameras 120 Coordinate system WGS 84 (EPSG::4326) Rotation angles Yaw, Pitch, Roll

Point Cloud Points 696,962 of 736,726 RMS reprojection error 0.103556 (0.501547 pix) Max reprojection error 0.403021 (27.1304 pix) Mean key point size 4.22775 pix Point colors 3 bands, uint8 Key points No Average tie point multiplicity 3.1439 Alignment parameters

Accuracy High Generic preselection Yes Reference preselection Yes Key point limit 60,000 Tie point limit 0 Adaptive camera model fitting Yes Matching time 6 minutes 10 seconds Alignment time 3 minutes 54 seconds

Optimization parameters Parameters f, b1, b2, cx, cy, k1-k4, p1, p2 Adaptive camera model fitting No Optimization time 32 seconds

Tiled Model Texture 3 bands, uint8 Reconstruction parameters

Source data Dense cloud Tile size 256 Face count Low Enable ghosting filter No Processing time 57 minutes 54 seconds

Orthomosaic Size 19,023 x 29,701 Coordinate system WGS 84 (EPSG::4326) Colors 3 bands, uint8 Reconstruction parameters

Blending mode Mosaic Surface Mesh Enable hole filling Yes Processing time 28 minutes 42 seconds

Software Version 1.5.1 build 7618 Platform Windows 64

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