Geomap can check coherence with other Geomaps
UtilityMap is a separate file
Sampled_points is no a function of Geomap
Introduce AccessibilityMap as a new class inheriting from Geomap
Correctly handle different scale for x and y axis

While here, do some code refactor.
Introduce VisibilityMap as a new Geomap class
Visibility is based on its own geofile
fix: better default area in geomap for the sampling
Fix sampling in geomaps
Mission map has expliit name utility_map
Check geomap coherence
Add metrics to utility map, and ways to print them