Detect automatically points which will form wrong georeference and warn users
The Georeferencer should display a warning in case a user is trying to save georeference which is going to be for sure not accurate.
Typical problems:
- Less then minimal amount of control points (two/three/four points - to decide)
- All points are in one line (affine transformation is not possible to calculate then).
- All points are very close together - the points should be ideally spread around the whole map.
- There are points with a very high calculated error
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