Quality control
After aerotriangulation you can use the control point editor in order to control the positioning quality or to identify errors.
You can get statistics for each point, for each measurement or for each photo, or global statistics.
You can get global statistics from the Survey Report.
Survey point items
You can get statistics for each survey point item, and for each measurement item: item border is colored according to the reprojection error (see Reprojection error).
Additional statistics are available from the item tooltip.
Quality metrics on a survey point item (colored border and tooltip)
Reprojection error
Reprojection error in pixels.
All items are colored according to this value (or to the RMS of this value), with the following rules:
3D error
Distance in meters (or units) between the given 3D position and the estimated 3D position.
Horizontal error
Horizontal distance in meters (or units) between the given 3D position and the estimated 3D position.
Vertical error
Vertical distance in meters (or units) between the given 3D position and the estimated 3D position.