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felt / tippecanoe

Build vector tilesets from large collections of GeoJSON features.
BSD 2-Clause "Simplified" License
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--coalesce not merging features with identical attributes #230

Open dvdkon opened 3 months ago

dvdkon commented 3 months ago

I'm trying to create tiles of a map of parcels, which are relatively small and generally share all attributes with neighbours. I'm using the following tippecanoe command line (dataset download):

tippecanoe \
  -L parcely:parcely_temp.fgb \
  --force -o tiles_parcely.pmtiles \
  -zg \
  --simplification=10 \
  --detect-shared-borders \
  --coalesce --reorder

However looking at the resulting tiles in the Protomaps viewer shows that even at low zoom levels features aren't merged. I don't understand this behaviour, isn't this exactly what --coalesce should be doing?