onthegomap/planetiler v0.10.0

on GitHub

What's Changed

This release adds initial support for creating MapLibre Vector Tiles by running planetiler with --tile-format=mlt option. With the default settings, this takes about 15% longer than MVT but reduces the output archive size by 5-10%. You can also opt-into different MLT settings with these cli options:

• --mlt-shared-dict to encoded string attributes using shared dictionaries to deduplicate repeated values. This reduces archive size an additional ~1% but reduces the largest tiles sizes by up 20-30% (see #1463, requires MapLibre GL 5.18.0 or later).
• --mlt-tessellate-polygons to store pre-computed polygon triangulations in the tiles so that clients like MapLibre GL don't need to do that expensive step client-side for each tile.
• --exclude-ids to reduce tile size even further by excluding feature IDs if your use-case does not require them (works for MVT and MLT).
• --mlt-reorder-features to allow MLT encoding to reduce tile size by re-ordering features if your use-case does not depend on implicit feature ordering.
• --mlt-fastpfor to use FastPFOR integer encodings. This makes tile encoding much slower but can improve decoding performance.
• --mlt-fsst to use FSST shared dictionary encodings. This also makes tile encoding much slower but can improve decoding performance.

--mlt-fastpfor and --mlt-fsst are meant to enable faster lightweight decompression than traditional heavyweight algorithms like gzip. You can disable gzip compression when using them by setting --tile-compression=none.

Big thanks to @louwers @mactrem @TimSylvester and @Turtelll for helping to fix issues found while adding MLT support to planetiler and to @Ingalls and the State of Colorado for sponsoring #1438!

All changes in this release:

• Adding MLT support:
  • Initial support for maplibre vector tiles by @msbarry in #1355
  • Upgrade to MLT 0.8, drop transitive JavaFastPFOR dep by @msbarry in #1439
  • Upgrade to mlt and tessellate polygons by @msbarry in #1442
  • Add mlt options by @msbarry in #1449
  • Add --mlt-shared-dict cli option by @msbarry in #1463
• OpenMapTiles: Upgrade to openmaptiles 3.16 by @msbarry in #1451
• Shortbread: Move shortbread off the admin-points shapefile by geofabrik by @CommanderStorm in #1403
• Add option to split ways to enable lightweight client-side routing by @msbarry in #1438
• Allow setting the version number of the tileset by @zstadler in #1377
• Clarify the impact of bounds on tile generation by @zstadler in #1378
• Improve name subkey validation by @1ec5 in #1404
• When merging features, assign IDs ending in 0 to the result by @jake-low in #1397
• handle GEOMETRYCOLLECTION by @phanecak-maptiler in #1447
• Fix OSM debug URL format by @msbarry in #1458

New Contributors

• @1ec5 made their first contribution in #1404
• @jake-low made their first contribution in #1397

Full Changelog: v0.9.3...v0.10.0