tippecanoe/CHANGELOG.md

1.9.11

• Fix a line simplification crash when a segment degenerates to a single point

1.9.10

• Warn if temporary disk space starts to run low

1.9.9

• Add --drop-polygons to drop a fraction of polygons by zoom level
• Only complain once about failing to clean polygons

1.9.8

• Use an on-disk radix sort for the index to control virtual memory thrashing when the geometry and index are too large to fit in memory

1.9.7

• Fix build problem (wrong spelling of long long max/min constants)

1.9.6

• Add an option to give specific layer names to specific input files

1.9.5

• Remove temporary files that were accidentally left behind
• Be more careful about checking memory allocations and array bounds
• Add GNU-style long options

1.9.4

• Tippecanoe-decode can decode .pbf files that aren't in an .mbtiles container

1.9.3

• Don't get stuck in a loop trying to split up very small, very complicated polygons

1.9.2

• Increase maximum tile size for tippecanoe-decode

1.9.1

• Incorporate Mapnik's Clipper upgrades for consistent results between Mac and Linux

1.9.0

• Claim vector tile version 2 in mbtiles
• Split too-complex polygons into multiple features

1.8.1

• Bug fixes to maxzoom, and more tests

1.8.0

• There are tests that can be run with "make test".

1.7.2

• Feature properties that are arrays or hashes get stringified rather than being left out with a warning.

1.7.1

• Make clipping behavior with no buffer consistent with Mapnik. Features that are exactly on a tile boundary appear in both tiles.

1.7.0

• Parallel processing of input with -P works with streamed input too
• Error handling if unsupported options given to -p or -a

1.6.4

• Fix crashing bug when layers are being merged with -l

1.6.3

• Add an option to do line simplification only at zooms below maxzoom

1.6.2

• Make sure line simplification matches on opposite sides of a tile boundary

1.6.1

• Use multiple threads for line simplification and polygon cleaning

1.6.0

• Add option of parallelized input when reading from a line-delimited file

1.5.1

• Fix internal error when number of CPUs is not a power of 2
• Add missing #include

1.5.0

• Base zoom for dot-dropping can be specified independently of maxzoom for tiling.
• Tippecanoe can calculate a base zoom and drop rate for you.

1.4.3

• Encode numeric attributes as integers instead of floating point if possible

1.4.2

• Bug fix for problem that would occasionally produce empty point geometries
• More bug fixes for polygon generation

1.4.1

• Features that cross the antimeridian are split into two parts instead of being partially lost off the edge

1.4.0

• More polygon correctness
• Query the system for the number of available CPUs instead of guessing
• Merge input files into one layer if a layer name is specified
• Document and install tippecanoe-enumerate and tippecanoe-decode

1.3.0

• Tile generation is multithreaded to take advantage of multiple CPUs
• More compact data representation reduces memory usage and improves speed
• Polygon clipping uses Clipper and makes sure interior and exterior rings are distinguished by winding order
• Individual GeoJSON features can specify their own minzoom and maxzoom
• New tile-join utility can add new properties from a CSV file to an existing tileset
• Feature coalescing, line-reversing, and reordering by attribute are now options, not defaults
• Output of decode utility is now in GeoJSON format
• Tile generation with a minzoom spends less time on unused lower zoom levels
• Bare geometries without a Feature wrapper are accepted
• Default tile resolution is 4096 units at all zooms since renderers assume it

1.2.0

• Switched to top-down rendering, yielding performance improvements
• Add a dot-density gamma feature to thin out especially dense clusters
• Add support for multiple layers, making it possible to include more than one GeoJSON featurecollection in a map. #29
• Added flags that let you optionally avoid simplifying lines, restricting maximum tile sizes, and coalescing features #30
• Added check that minimum zoom level is less than maximum zoom level
• Added -v flag to check tippecanoe's version