Allow mapping non-point geometries to allow higher resolutions

[Rikuoja]

Currently, it is impossible to make maps with a resolution > 8, because some of the datasets are at that resolution.

They are currently saved as points, which means they will not be aggregated correctly at resolutions 9 and above.

Save any averaged/grid datasets with the original grid geometries instead, so resolution 9 maps can be generated by sampling the underlying grid polygon(s) just by taking e.g. the centroid of H3 polygon and the corresponding grid polygon for the value.