enhancement:maptool:slice big polygons into smaller parts (#906)

This commit allows to slice all polygons (except poly_water_sliced) into
squares so that they fit into smaller map tiles. Holes if present are
correctly sliced as well.

This has the advantage that they do not need to be processed albeit not
being displayed, and navit-planet-extractor can filter them out.

This has the disadvantage that the big polygons are displayed checkered
if the corresponding itemgra in config features an outline.

TODO: Slice already on polygon creation. Currently the slicing has to be
performed twice, because of tile preprocessing and saving is done in
seperate steps from the tempfiles.

TODO: Make the trigger for slicing configurable. Right now it slices
everything smaller than tile level 4.

0 files changed, 0 insertions, 0 deletions