A reverse geocoder takes a latitude and longitude coordinate and gives you the (best-guess) address of that location. This library provides easy access to multiple reverse geocoders under a unified interface. Currently supported are:

• google - Google Maps
• mapquestopen - MapQuest Open (requires API key)
• mapquestnominatim - MapQuest Nominatim (default)

The library is somewhat USA-centric right now, due to our current use cases.

Interface

The reverseGeocode function takes a latitude and longitude, along with an optional service name to override which service is chosen. It returns a Q promise for the results object.

var rg = require('reverse-geocoders');
rg.reverseGeocode(42.04759, -87.67954).then(console.log);

will print:

{ street_number: '1640',
  street: 'Chicago Avenue',
  city: 'Evanston',
  state: 'Illinois',
  postal_code: '60201',
  country: 'United States of America',
  formatted_address: 'Whole Foods, 1640, Chicago Avenue, South Evanston, Evanston, Cook County, Illinois, 60201, United States of America' }

You can override the service that is called by passing in a third argument to reverseGeocode:

rg.reverseGeocode(42.04759, -87.67954, 'google').then(console.log);

Results are translated into a common format, which is an object containing the following properties:

• street_number
• street
• city
• state
• postal_code
• country
• formatted_address

The result may be missing one or more of these properties if no data was found, most commonly the street number.