rasterize-vector-tiles


rasterize-vector-tiles converts vector tile sets in .mbtiles SQLite archives to PNG raster tile sets.

Features

- Reads: Vector tiles (.mbtiles)
- Reads protobuf .pbf vector tiles
- Compressed (deflate, gzip) or uncompressed tiles
- Writes: Raster tiles (.mbtiles)
- Containing .png data
- Transparency
- Configurable property to use for color

Use

rasterize-vector-tiles has command-line options:

``console
$ npx rasterize-vector-tiles
Usage: npx rasterize-vector-tiles

source Vector tile set in .mbtiles format
target Raster tile set to be created (.mbtiles)

Options:
--colorprop value Feature property to use for gray level (0-255), default='value'
--nodata 255 Colorprop value to interpret as nodata (will not be rendered), default=255
--antialias none Control anti-aliasing (none/default/gray/subpixel), default=none
--zoomlevel 14 Upper limit on zoom level to rasterize (0-99), default=highest in input file
--png Export as individual png files rather than .mbtiles archive
`

Sample workflow

`sh


Rasterize the highest zoom level in source

node rasterize-vector-tiles.js src_vtiles.mbtiles dest_png.mbtiles --colorprop value --nodata 255

Build all lower zoom levels

gdaladdo -r average gradient.3857.mbtiles 2 4 8 16 32 64 128 256 512 1024 2048
``