GIS » Gisaf

Alternative for getting mbtiles: generation from osm data¶

Download from an OSM mirror:

curl -O http://download.openstreetmap.fr/extracts/asia/india/tamil_nadu.osm.pbf
curl -O http://download.openstreetmap.fr/extracts/asia/india/puducherry.osm.pbf

Generation of mbtiles:¶

OGR (GDAL)¶

1. Takes a long time/CPU
2. Can process only 1 file (see ogr2ogr for merging files beforehand)

## Need to generate a single .osm.pdf files 
ogr2ogr -f MBTILES target.mbtiles tamil_nadu.osm.pbf -dsco MAXZOOM=15

Alternative for serving mbtiles¶

mbtiles-server¶

Source: https://github.com/tobinbradley/mbtiles-server

Tegola¶

Source: https://github.com/go-spatial/tegola

Python¶

Looks easy, there are libraries for mbtiles (TileStache: http://tilestache.org/).

But, not found any quick and easy solution for serving to mapbox-gl.

Another option: generate static .pbf files using gdal's MVT provider:

ogr2ogr -s_srs EPSG:4326 -t_srs EPSG:3857 -a_srs EPSG:3857 -f MVT /usr/local/lib/gisaf_misc/tiles tamil_nadu.osm.pbf -dsco MAXZOOM=14

The tiles are the same than those generated with MBTILES (used by eg. tileserver), in a proper directory structure that can be served by nginx. The metadata.json file is almost same that what tileserver exposes for mapbox-gl, but needs to be cleaned.

Tried tegola:

imposm with https://github.com/go-spatial/tegola-osm config.

Got it to work, but the CPU/RAM/storage usage is very high for generating mbtiles from a PostGIS DB.

> -tegola

Comprehensive list of related tools: https://github.com/mapbox/awesome-vector-tiles#cli-utilities

tilemaker (https://github.com/systemed/tilemaker) worth trying (got compilation error related to protobuf in first try)