leaflet-control-geocoder

Extendable geocoder with builtin support for Nominatim, Bing, Google, Mapbox, Photon, What3Words, MapQuest

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Leaflet Control Geocoder

A simple geocoder for Leaflet that by default uses OSM/Nominatim.

The plugin supports many different data providers:

The plugin can easily be extended to support other providers.

See the Leaflet Control Geocoder Demo.

Usage

Download latest release. Load the CSS and Javascript:

<link rel="stylesheet" href="Control.Geocoder.css" />
<script src="Control.Geocoder.js"></script>

Add the control to a map instance:

var map = L.map('map').setView([0, 0], 2);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
L.Control.geocoder().addTo(map);

Customizing

By default, when a geocoding result is found, the control will center the map on it and place a marker at its location. This can be customized by overwriting the control's markGeocode function, to perform any action desired.

For example:

var geocoder = L.Control.geocoder().addTo(map);
 
geocoder.markGeocode = function(result) {
    var bbox = result.bbox;
    L.polygon([
         bbox.getSouthEast(),
         bbox.getNorthEast(),
         bbox.getNorthWest(),
         bbox.getSouthWest()
    ]).addTo(map);
};

This will add a polygon representing the result's boundingbox when a result is selected.

API

This is the geocoder control. It works like any other Leaflet control, and is added to the map.

L.Control.Geocoder(options)
OptionTypeDefaultDescription
collapsedBooleantrueCollapse control unless hovered/clicked
positionString"topright"Control position
placeholderString"Search..."Placeholder text for text input
errorMessageString"Nothing found."Message when no result found / geocoding error occurs
geocoderIGeocodernew L.Control.Geocoder.Nominatim()Object to perform the actual geocoding queries
showResultIconsBooleanfalseShow icons for geocoding results (if available); supported by Nominatim
MethodReturnsDescription
markGeocode( result)thisMarks a geocoding result on the map

Uses Nominatim to respond to geocoding queries. This is the default geocoding service used by the control, unless otherwise specified in the options. Implements IGeocoder.

Unless using your own Nominatim installation, please refer to the Nominatim usage policy.

L.Control.Geocoder.Nominatim(options)
OptionTypeDefaultDescription
serviceUrlString"http://nominatim.openstreetmap.org/"URL of the service
geocodingQueryParamsObject{}Additional URL parameters (strings) that will be added to geocoding requests; can be used to restrict results to a specific country for example, by providing the countrycodes parameter to Nominatim
reverseQueryParamsObject{}Additional URL parameters (strings) that will be added to reverse geocoding requests
htmlTemplatefunctionspecialA function that takes an GeocodingResult as argument and returns an HTML formatted string that represents the result. Default function breaks up address in parts from most to least specific, in attempt to increase readability compared to Nominatim's naming

Uses Bing Locations API to respond to geocoding queries. Implements IGeocoder.

Note that you need an API key to use this service.

L.Control.Geocoder.Bing(<String> key)

An interface implemented to respond to geocoding queries.

MethodReturnsDescription
geocode( query, callback, context)GeocodingResult[]Performs a geocoding query and returns the results to the callback in the provided context
reverse(<L.LatLng> location, scale, callback, context)GeocodingResult[]Performs a reverse geocoding query and returns the results to the callback in the provided context

An object that represents a result from a geocoding query.

PropertyTypeDescription
nameStringName of found location
boundsL.LatLngBoundsThe bounds of the location
centerL.LatLngThe center coordinate of the location
iconStringURL for icon representing result; optional
htmlString(optional) HTML formatted representation of the name