NEWS

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freestiler 0.1.7 (2026-05-12)

• Updated the CRAN Rust build path to use a dependency graph compatible with rustc/cargo 1.77.2.

freestiler 0.1.0

Initial release.

Tile generation

• freestile() creates PMTiles archives from sf data frames with zero external dependencies (no tippecanoe, no Java, no Go).
• Supports MapLibre Tiles (MLT) and Mapbox Vector Tiles (MVT) output formats.
• Multi-layer output via named lists or freestile_layer() per-layer zoom control.

Geometry types

• POINT, MULTIPOINT, LINESTRING, MULTILINESTRING, POLYGON, MULTIPOLYGON.
• Automatic CRS transformation to WGS84.
• Z/M dimension handling (dropped automatically).

Performance features

• Parallel tile encoding with rayon (across tiles and within tiles).
• Tile-pixel grid snapping for zoom-adaptive simplification without slivers.
• Buffered tile assignment and clipping for seamless tile boundaries.

Feature management

• drop_rate exponential feature thinning with Morton-curve spatial ordering for points and area-based ordering for polygons/lines.
• base_zoom control for ensuring all features present at higher zooms.
• cluster_distance point clustering with point_count attribute.
• coalesce line merging and polygon grouping.

MLT encoder

• Spec-compliant MapLibre Tile encoder with varint, delta, RLE, and dictionary encoding.
• Validated against mlt-core 0.1.2 reference decoder.