node-geocoder

node-geocoder

Node library for geocoding and reverse geocoding. Can be used as a nodejs library

Installation (nodejs library)

npm install node-geocoder

Usage example

var geocoderProvider = 'google';
var httpAdapter = 'http';
// optionnal
var extra = {
    apiKey: 'YOUR_API_KEY', // for Mapquest, OpenCage, Google Premier
    formatter: null         // 'gpx', 'string', ...
};

var geocoder = require('node-geocoder')(geocoderProvider, httpAdapter, extra);

// Using callback
geocoder.geocode('29 champs elysée paris', function(err, res) {
    console.log(res);
});

// Or using Promise
geocoder.geocode('29 champs elysée paris')
    .then(function(res) {
        console.log(res);
    })
    .catch(function(err) {
        console.log(err);
    });

// output :
[{
    latitude: 48.8698679,
    longitude: 2.3072976,
    country: 'France',
    countryCode: 'FR',
    city: 'Paris',
    zipcode: '75008',
    streetName: 'Champs-Élysées',
    streetNumber: '29',
    administrativeLevels:
     { level1long: 'Île-de-France',
       level1short: 'IDF',
       level2long: 'Paris',
       level2short: '75' }
}]

Advanced usage (only google, here, and opencage providers)

geocoder.geocode({address: '29 champs elysée', country: 'France', zipcode: '75008'}, function(err, res) {
    console.log(res);
});

// OpenCage advanced usage example
geocoder.geocode({address: '29 champs elysée', countryCode: 'fr', minConfidence: 0.5, limit: 5}, function(err, res) {
    console.log(res);
});

// Reverse example

// Using callback
geocoder.reverse({lat:45.767, lon:4.833}, function(err, res) {
    console.log(res);
});

// Or using Promise
geocoder.reverse({lat:45.767, lon:4.833})
    .then(function(res) {
        console.log(res);
    })
    .catch(function(err) {
        console.log(err);
    });

// Batch geocode

geocoder.batchGeocode(['13 rue sainte catherine', 'another adress'], function (results) {
    // Return an array of type {error: false, value: []}
    console.log(results) ;
});

// Set specific http request headers:
var HttpsAdapter = require('node-geocoder/lib/httpadapter/httpsadapter.js')
var httpAdapter = new HttpsAdapter(null,
  {
    headers: {
      'user-agent': 'My application <[e-mail]>',
      'X-Specific-Header': 'Specific value'
    }
  })

var geocoder = require('node-geocoder')(geocoderProvider, httpAdapter, extra);
...

Geocoder Provider

• google : GoogleGeocoder. Supports address geocoding and reverse geocoding. Use extra.clientIdand extra.apiKey(privateKey) for business licence. You can also use extra.language and extra.region to specify language and region, respectively. Note that 'https' is required when using an apiKey
• here : HereGeocoder. Supports address geocoding and reverse geocoding. You must specify extra.appId and extra.appCode with your license keys. You can also use extra.language, extra.politicalView (read about political views here), extra.country, and extra.state.
• freegeoip : FreegeoipGeocoder. Supports IP geocoding
• datasciencetoolkit : DataScienceToolkitGeocoder. Supports IPv4 geocoding and address geocoding. Use extra.host to specify a local instance
• openstreetmap : OpenStreetMapGeocoder. Supports address geocoding and reverse geocoding. You can use extra.language and extra.email to specify a language and a contact email address.
  • For geocode, you can use an object as value, specifying one or several parameters from https://wiki.openstreetmap.org/wiki/Nominatim#Parameters
  • For reverse, you can use additional parameters from https://wiki.openstreetmap.org/wiki/Nominatim#Parameters_2
  • You should specify a specific user-agent or referrer header field as required by https://wiki.openstreetmap.org/wiki/Nominatim_usage_policy
• mapquest : MapQuestGeocoder. Supports address geocoding and reverse geocoding. Needs an apiKey
• openmapquest : Open MapQuestGeocoder (based on OpenStreetMapGeocoder). Supports address geocoding and reverse geocoding. Needs an apiKey
• agol : ArcGis Online Geocoding service. Supports geocoding and reverse. Requires a client_id & client_secret and 'https' http adapter
• tomtom: TomTomGeocoder. Supports address geocoding. You need to specify extra.apiKey
• nominatimmapquest: Same geocoder as openstreetmap, but queries the MapQuest servers. You need to specify extra.apiKey
• opencage: OpenCage Geocoder. Uses multiple open sources. Supports address and reverse geocoding. You need to specify extra.apiKey
• smartyStreet: Smarty street geocoder (US only), you need to specify extra.auth_id and extra.auth_token
• geocodio: Geocodio, Supports address geocoding and reverse geocoding (US only)
• yandex: Yandex support address geocoding, you can use extra.language to specify language
• teleport: Teleport supports city and urban area forward and reverse geocoding; for more information, see Teleport API documentation

Http adapter

• https: This adapter uses the Https nodejs library (default)
• http: This adapter uses the Http nodejs library

You can specify request timeout using paramater extra.timeout

Formatter

• gpx : format result using GPX format
• string : format result to an String array (you need to specify extra.formatterPattern key)
  • %P country
  • %p country code
  • %n street number
  • %S street name
  • %z zip code
  • %T State
  • %t state code

More

Extra

node-geocoder-cli You can use node-geocoder-cli to geocode in shell

Extending node geocoder

You can add new geocoders by implementing the two methods geocode and reverse:

var geocoder = {
    geocode: function(value, callback) { ... },
    reverse: function(query, callback) { var lat = query.lat; var lon = query.lon; ... }
}

You can also add formatter implementing the following interface

var formatter = {
    format: function(data) { return formattedData; },
}

Contributing

You can improve this project by adding new geocoders or http adapters.

To run tests just npm test.

To check code style install jshint and just run jshint lib test.