overpass-wrapper

This is a simple wrapper around the command line utility named osm3s_query that ships with Overpass API.

It can be used like this:

const overpass_wrapper = require('overpass-wrapper');


function callback(result, err) {

    console.log(result);
}

overpass_wrapper.overpassQuery('[out:json]; relation["name"="Firenze"]["type"="boundary"];out geom;', '/opt/overpass/db', callback );

`

The osm3s_query executable must be in the path.

The package provides three different functions:

• overpassQuery(query_string, db_dir, callback): takes a query string in allowed Overpass format, the location of the Overpass database and a callback that will be invoked passing the result string
• overpassQueryAsObject(query_string, db_dir, callback): same as previous function but converts the resulting JSON string into an object that will be passed to the callback
• overpassQueryGeoJSON(query_string, db_dir, callback, options): this function will convert the OSM-JSON data to GeoJSON object that will be passed to the callback. The options parameter is optional and will be forwarded to osmtogeojson to control some conversion settings (see https://www.npmjs.com/package/osmtogeojson)