Fix crash when using tile-join to join an empty pmtiles tileset

2.18.0

• Fix crash when using tile-join to join an empty pmtiles tileset

Add support for pmtiles output format

2.17.0

• Add pmtiles output format

Reduce memory usage when there are large numbers of features

2.16.0

• During tiling, limit the size of the statistics that are kept for -as-needed calculations, because they can get quite large for sources with hundreds of millions of features.

Generate fewer duplicate label points at high zoom levels

2.15.0

• Generate label points in a more straightforward checkerboard, and fewer of them at high zoom levels.

Don't preflight zoom levels for potential as-needed dropping

2.14.0

• Don't preflight each zoom level if one of the as-needed options is specified. Instead, go ahead and write out the tiles, and then clear out the zoom level for another try if necessary.

Simplify geometry earlier when the in-memory representation of a tile gets large, to reduce peak memory usage

2.13.1

• Simplify geometry earlier when the in-memory representation of a tile gets large, to reduce peak memory usage

Improve quality of coalescing-as-needed; add options to limit feature count

2.13.0

• Add --limit-tile-feature-count and --limit-tile-feature-count-at-maximum-zoom
• Coalesce small features only onto other small features with --coalesce-smallest-as-needed, never onto large features
• Clean coalesced-as-needed features before simplifying them, to improve simplification quality

Add an option to drop more points in dense areas than in sparse areas

2.12.0

• Add --drop-denser option to drop points in dense clusters in preference
  to those in sparse areas.

Limit guessed maxzoom to avoid spending too many tiles on polygon fill

2.11.0

• Change sqlite3 schema to deduplicate identical tiles
• Limit guessed maxzoom to avoid spending too many tiles on polygon fill

2.10.0

• Upgrade flatbuffers version

Do label generation after simplification, not before

2.9.1

• Do label generation after simplification, not before.