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**General / Re: PhotoScan Handling Different Flights**

« **on:**February 21, 2018, 05:09:59 PM »

On both flights the altitude above ground were closely fixed despite the differences on terrain altitude (more than 200m of unevenness) due to DEM terrain tracking.

Flying altitude: 60.4 m

Camera stations: 88

Tie points: 66,031 of 69,358

Projections: 154,798

Reprojection error RMS: 0.326 pix

Reprojection error MAX: 9.201 pix

Mean key point size: 2.43 pix

Effective overlap: 2.38

Using geotags. Xerror: 0.61m, Yerror: 0.98m Zerror: 0.55m, Total error: 1.29m

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Flying altitude: 86.9 m

Camera stations: 60

Tie points: 62,454 of 65,961

Projections: 151,253

Reprojection error RMS: 0.582 pix

Reprojection error MAX: 16.528 pix

Mean key point size: 4.05 pix

Effective overlap 2.50

Using geotags. Xerror: 1.10m, Yerror: 1.73m, Zerror: 0.93m, Total error: 2.26m

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Flying altitude: 70.2 m

Camera stations: 149

Tie points: 130,728 of 138,234

Projections: 312,085

Reprojection error RMS: 0.483 pix

Reprojection error MAX: 16.308 pix

Mean keypoint size: 3.26 pix

Effective overlap: 2.463

Using geotags. Xerror: 0.86m, Yerror: 1.40m, Zerror: 0.91m, Total error: 1.88m

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This uses the PS feature of Workflow > Merge chunks.... (merge tie points)

Flying altitude: 71.2m

Camera stations: 148

Tie points: 128,485 of 135,319

Projections: 306,051

Reprojection error RMS: 0.471 pix

Reprojection error MAX: 16.528 pix

Mean keypoint size: 3.23 pix

Effective overlap: 2.44

Using geotags. Xerror:0.85m, Yerror: 1.34m. Zerror: 1.58, Total error: 1.74m

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This uses the PS feature of Workflow > Align chunks... Then, Merge chunks.... (merge tie points)

Flying altitude: 71.2m

Camera stations: 148

Tie points: 128,485 of 135,319

Projections: 306,051

Reprojection error RMS: 0.471 pix

Reprojection error MAX: 16.528 pix

Mean keypoint size: 3.23 pix

Effective overlap: 2.44

Using geotags. Xerror:1.76m, Yerror: 1.38m. Zerror: 1.36, Total error: 2.62m

**Flight #1:**Flying altitude: 60.4 m

**Ground resolution: 2.62 cm/pix**Camera stations: 88

Tie points: 66,031 of 69,358

Projections: 154,798

Reprojection error RMS: 0.326 pix

Reprojection error MAX: 9.201 pix

Mean key point size: 2.43 pix

Effective overlap: 2.38

Using geotags. Xerror: 0.61m, Yerror: 0.98m Zerror: 0.55m, Total error: 1.29m

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**Flight #2:**Flying altitude: 86.9 m

**Ground resolution: 3.77 cm/pix**Camera stations: 60

Tie points: 62,454 of 65,961

Projections: 151,253

Reprojection error RMS: 0.582 pix

Reprojection error MAX: 16.528 pix

Mean key point size: 4.05 pix

Effective overlap 2.50

Using geotags. Xerror: 1.10m, Yerror: 1.73m, Zerror: 0.93m, Total error: 2.26m

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**Flights 1 + 2:**(*processed together*)Flying altitude: 70.2 m

**Ground resolution: 3.04 cm/pix**Camera stations: 149

Tie points: 130,728 of 138,234

Projections: 312,085

Reprojection error RMS: 0.483 pix

Reprojection error MAX: 16.308 pix

Mean keypoint size: 3.26 pix

Effective overlap: 2.463

Using geotags. Xerror: 0.86m, Yerror: 1.40m, Zerror: 0.91m, Total error: 1.88m

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**Merged chunks from individual processed flights 1 and 2**This uses the PS feature of Workflow > Merge chunks.... (merge tie points)

Flying altitude: 71.2m

**Ground resolution: 3.09 cm/pix**Camera stations: 148

Tie points: 128,485 of 135,319

Projections: 306,051

Reprojection error RMS: 0.471 pix

Reprojection error MAX: 16.528 pix

Mean keypoint size: 3.23 pix

Effective overlap: 2.44

Using geotags. Xerror:0.85m, Yerror: 1.34m. Zerror: 1.58, Total error: 1.74m

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**Chunks aligned + merged from individually processed flights (chunks) 1 and 2**This uses the PS feature of Workflow > Align chunks... Then, Merge chunks.... (merge tie points)

Flying altitude: 71.2m

**Ground resolution: 3.09 cm/pix**Camera stations: 148

Tie points: 128,485 of 135,319

Projections: 306,051

Reprojection error RMS: 0.471 pix

Reprojection error MAX: 16.528 pix

Mean keypoint size: 3.23 pix

Effective overlap: 2.44

Using geotags. Xerror:1.76m, Yerror: 1.38m. Zerror: 1.36, Total error: 2.62m