Generalization: Get extent of source layer also for raster layers #2218
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When generalizations are calculated by tile we need to know which extent to work on. If we are not working with a full planet we get that information from the (estimated) extent of the source layer. This adds support for determining the extent for raster-based source layers. This is needed when we generalize source layers into rasters and then use those rasters as source for even lower level tiles.
It appears that with C++20 the fmt library expects the format string to be constexpr.
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When generalizations are calculated by tile we need to know which extent to work on. If we are not working with a full planet we get that information from the (estimated) extent of the source layer. This adds support for determining the extent for raster-based source layers.
This is needed when we generalize source layers into rasters and then use those rasters as source for even lower level tiles.