GitHub - mapbox/osm-sidewalker: Detecting untagged sidewalks in OSM (original) (raw)

osm-sidewalker

A Tile Reduce processor for detecting potentially untagged sidewalks in OpenStreetMap

installation

downloading osm qa tiles

OSM QA tiles are very large (38 GB compressed, 49 GB expanded). On OSX & Linux systems, you can run the build process by executing ./download.sh.

On Windows, or if you wish to download QA tiles yourself:

• Create a data folder inside your copy of this repository
• Download OSM QA tiles
• Use gunzip or any other archiving tool that can expand .gz files to expand OSM QA tiles
• Move the expanded latest.planet.mbtiles to the data folder

running

When executing the Tile Reduce task, you must provide a bounding box to select tiles. For example:

node index.js --area=[-77.12,38.79,-76.9,39] > output.json

publishing

The output of the Tile Reduce job is a line-separated list of sidewalk linestrings. This format works well with tippecanoe, for example:

tippecanoe -f -o sidewalks.mbtiles output.json

The resulting mbtiles can be uploaded as a Mapbox data source online, or via command line using mapbox-upload