Currently, YAC does not check whether the `points` defined by the user (`def_points`) actually match with the associated grid definition. This was the reason for !564 not being detected earlier. I would propose to add a check to the `points` definition: - `CORNER`: - have to match with grid vertices (with some tolerance) - `CELL`: - coarse check (cheap): coordinates have to be inside the bounding circle - fine check (expensive): coordinates have to be inside the cell - `EDGE`: - coarse check (cheap): distance between coordinates and vertices of associated edges is smaller then length of the edge - fine check (expensive): coordinates are on the edge This would probably require some additional configuration option: - `coordinates_missmatch_is_fatale` - `coordinate_check: off/coarse/fine`