# tilemill-overpass-preprocess

When you want small dataset from overpass API. Very alpha.

How to

Install tilemill-overpass-preprocess:

npm install tilemill-overpass-preprocess

In the mml file, add a table attribute, with the overpass query, for example:

…
"Datasource": {
    "file": "/home/ybon/Downloads/montbrun-data/roads.geojson",
    "layer": "OGRGeoJSON",
    "table": "area[name='Montbrun-Bocage'][admin_level=8]->.zone;(way(area.zone)[highway];);(._;>;);out;"
},
…

Then run ./node_modules/tilemill-overpass-preprocess/bin/tilemill-overpass-preprocess yourprojectname, and every query will be run and the files created.

By default, existing files will not be overrided, add --force to force.