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esri-leaflet-geocoder

Esri Geocoding utilities and search plguin for Leaflet.

1.0.0-rc.4
Source
npm

Version published: 10 years ago

Weekly downloads: 27K; decreased by-5%

Maintainers: 1

Weekly downloads

Created: 10 years ago

Source

Esri Leaflet Geocoder

The Esri Leaflet Geocoder is a small series of API helpers and UI controls to interact with the ArcGIS Online geocoding services.

Travis CI

Currently Esri Leaflet Geocoder is in development and should be thought of as a beta or preview

Esri Leaflet Geocoder relies on the minimal Esri Leaflet Core which handles abstraction for requests and authentication when neccessary. You can find out more about the Esri Leaflet Core on the Esri Leaflet downloads page.

Example

Take a look at the live demo.

Example Image

<!DOCTYPE html>
<html>
  <head>
    <title>Esri Leaflet Geocoder</title>

    <!-- Load Leaflet from their CDN -->
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
    <script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet-src.js"></script>

    <!-- Make the map fill the entire page -->
    <style>
      #map {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
      }
    </style>

    <!-- Esri Leaflet Core -->
    <script src="http://cdn-geoweb.s3.amazonaws.com/esri-leaflet/0.0.1-beta.5/esri-leaflet-core.js"></script>

    <!-- Esri Leaflet Geocoder -->
    <script src="http://cdn-geoweb.s3.amazonaws.com/esri-leaflet-geocoder/0.0.1-beta.3/esri-leaflet-geocoder.js"></script>
    <link rel="stylesheet" type="text/css" href="http://cdn-geoweb.s3.amazonaws.com/esri-leaflet-geocoder/0.0.1-beta.3/esri-leaflet-geocoder.css">
  </head>
  <body>
    <div id="map"></div>
    <script>
      var map = L.map('map').setView([45.5165, -122.6764], 12);

      var tiles = L.tileLayer("http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png").addTo(map);

      // create the geocoding control and add it to the map
      var searchControl = new L.esri.Controls.Geosearch().addTo(map);

      // create an empty layer group to store the results and add it to the map
      var results = new L.LayerGroup().addTo(map);

      // listen for the results event and add every result to the map
      searchControl.on("results", function(data){
        results.clearLayers();
        for (var i = data.results.length - 1; i >= 0; i--) {
          results.addLayer(L.marker(data.results[i].latlng));
        };
      });
    </script>
  </body>
</html>

L.esri.Geocoding.Controls.Geosearch

Constructor

Extends L.Control

Constructor	Options	Description
`new L.esri.Controls.Geosearch(options)` `L.esri.Controls.geosearch(options)`	`<GeosearchOptions>`	Creates a new Geosearch control.

Options

Option	Type	Default	Description
`position`	`String`	`topleft`	One of the valid Leaflet control positions.
`zoomToResult`	`Boolean`	`true`	If `true` the map will zoom the result after geocoding is complete.
`useMapBounds`	`Boolean` or `Integer`	`12`	Determines if and when the geocoder should begin using the bounds of the map to enchance search results. If `true` the geocoder will always return results in the current map bounds. If `false` it will always search the world. If an integer like `11` is passed in the geocoder will use the bounds of the map for searching if the map is at a zoom level equal to or greater than the integer. This mean the geocoder will prefer local results when the map is zoomed in.
`collapseAfterResult`	`Boolean`	`true`	If the geocoder is expanded after a result this will collapse it.
`expanded`	`Boolean`	`true`	Start the control in an expanded state.
`maxResults`	`Integer`	`25`	The maximum number of results to return from a geocoding request. Max is 50.
`allowMultipleResults`	`Boolean`	`true`	If set to `true` and the user submits the form without a suggestion selected geocodes the current text in the input and zooms the user to view all the results.
`useArcgisWorldGeocoder`	`Boolean`	`true`	Use the ArcGIS Online World Geocoder by default in the array of providers.
`providers`	`Array`	See Description	An array of `EsriLeafletGeocoding.Controls.Geosearch.Providers` objects. These additional providers will also be searched for possible results and added to the suggestion list.
`placeholder`	`String`	`'Search for places or addresses'`	Placeholder text for the search input.
`title`	`String`	`Location Search`	Title text for the search input. Shows as tool tip on hover.

Methods

Method	Options	Description
`clear()`	`null`	Clears the text currently in the geocoder and collapses it if `collapseAfterResult` is true.

Events

Event	Data	Description
`load`	`null`	A generic event fired when a request to the geocoder starts.
`loading`	`null`	A generic event fired when a request to the geocoder finished.
`results`	`<ResultsEvent>`	Fired when a result is returned from the geocoder.

Styling

For reference here is the internal structure of the geocoder...

<div class="geocoder-control leaflet-control">

  <input class="geocoder-control-input leaflet-bar">

  <ul class="geocoder-control-suggestions leaflet-bar">
    <li class="geocoder-control-suggestion geocoder-control-selected">The Selected Result</li>
    <li class="geocoder-control-suggestion">Another Result</li>
  </ul>
</div>

Providers

The Geosearch control can also search for results from a varity of sources including Feature Layers and Map Services. This is done with plain text matching and is not "real" geocoding. But it allows you to mix custom results into search box.

var gisDay = new L.esri.Geocoding.Controls.Geosearch.Providers.FeatureLayer('https://services.arcgis.com/uCXeTVveQzP4IIcx/arcgis/rest/services/GIS_Day_Final/FeatureServer/0', {
  searchFields: ['Name', 'Organization'], // Search these fields for text matches
  label: 'GIS Day Events', // Group suggestions under this header
  formatSuggestion: function(feature){
    return feature.properties.Name + ' - ' + feature.properties.Organization; // format suggestions like this.
  }
});

L.esri.Geocoding.Controls.geosearch({
  providers: [gisDay]
}).addTo(map);

Available Providers

L.esri.Geocoding.Controls.Geosearch.Providers.ArcGISOnline - Included by default unless the useArcgisWorldGeocoder option is set to false.
L.esri.Geocoding.Controls.Geosearch.Providers.FeatureLayer - Gets results by querying the Feature Layer for text matches.
L.esri.Geocoding.Controls.Geosearch.Providers.MapService - Uses the find and query methods on the Map Service to get text matches.
L.esri.Geocoding.Controls.Geosearch.Providers.GeocodeService - Use a ArcGIS Server Geocode Service. This option does not support suggestions.

Provider Options

Option	Type	Default	Description
`searchFields`	`Array[Strings]`	None	An array of fields to search for text. Not valid for the `ArcGISOnline` and `GeocodeService` providers.
`layer`	`Integer`	`0`	Only valid for `MapService` providers, the layer to find text matches on.
`label`	`String`	Provider Type	Text that will be used to group suggestions under.
`maxResults`	`Integer`	5	Maximum number of results to show for this provider.
`bufferRadius`,	`Integer`	If a service or layer contains points, buffer points by this radius to create bounds. Not valid for the `ArcGISOnline` and `GeocodeService` providers
`formatSuggestion`	`Function`	See Description	Formating function for the suggestion text. Receives a feature and returns a string.

Results Event

Property	Type	Description
`bounds`	`L.LatLngBounds`	The bounds around this suggestion. Good for zooming to results like cities and states.
`latlng`	`L.LatLng`	The center of the result.
`results`	`[<ResultObject>]`	An array of result objects.

Result Object

A single result from the geocoder. You should not rely on all these properties being present in every result object.

Property	Type	Description
`text`	`String`	The text that was passed to the geocoder.
`bounds`	`L.LatLngBounds`	The bounds around this suggestion. Good for zooming to results like cities and states.
`latlng`	`L.LatLng`	The center of the result.

The result object will also contain any additional properties from the provider. So when geocoding you will also get address breakdowns and when text matching features you will get the additional fields from that feature.

L.esri.Geocoding.Services.Geocoding

A basic wrapper for ArcGIS Online geocoding services. Used internally by L.esri.Controls.Geosearch.

Constructor

Constructor	Description
`new L.esri.Geocoding.Geocoding(url, options)` `L.esri.Controls.geosearch(url, options)` `new L.esri.Services.Geocoding(options)` `L.esri.Controls.geosearch(options)`	Creates a new Geosearch control. You can pass the url as the first parameter or as `url` in the options to a custom geocoding endpoint if you do not want to use the ArcGIS Online World Geocoding service.

Options

You can pass any options you can pass to L.esri.Services.Service.

Methods

Method	Returns	Description
`geocode()`	L.esri.Geocoding.Tasks.Geocode	Returns a new Geocode task bound to this server.
`suggest()`	L.esri.Geocoding.Tasks.Suggest	Returns a new Suggest task bound to this server.
`reverse()`	L.esri.Geocoding.Tasks.ReverseGeocode	Returns a new ReverseGeocode task bound to this server.

Events

L.esri.Services.FeatureLayer fires all L.esri.Services.service events.

L.esri.Geocoding.Tasks.Geocode

Constructor

Constructor	Description
`new L.esri.Geocoding.Tasks.Geocode(url, options)` `L.esri.Geocoding.Tasks.geocode(url, options)`	Creates a new Geocode task. `L.esri.Geocoding.WorldGeocodingService` can be used as a reference to the ArcGIS Online World Geocoder.

Options

You can pass any options you can pass to L.esri.Tasks.Task.

Methods

Method	Returns	Description
`text(text <String>)`	`this`	The text to geocode. If you specify `text` all other params like `address`, `city`, `subregion`, and `region`, `postal`, and `country` will be ignored.
`address(text <String>)`	Specify the street and house number to be geocoded.
`neighborhood(text <String>)`	Specify the neighborhood to be geocoded.
`city(text <String>)`	Specify the city to be geocoded.
`subregion(text <String>)`	Specify the subregion to be geocoded. Depending on the country, subregion can represent a county, state, or province.
`region(text <String>)`	Specify the region to be geocoded. Typically a state or province
`postal(text <String>)`	Specify the postal code to be geocoded.
`country(text <String>)`	Specify the country to be geocoded.
`category(category <String>)`	The category to search for suggestions. By default no category. A list of categories can be found here https://developers.arcgis.com/rest/geocode/api-reference/geocoding-category-filtering.htm#ESRI_SECTION1_502B3FE2028145D7B189C25B1A00E17B
`within(bounds <L.LatLngBounds>)`	A bounding box to search for suggestions in.
`nearby(latlng <L.LatLng>, distance <Integer>)`	Searches for suggestions only inside an area around the LatLng. `distance` is in meters.
`run(callback <Function>, context <Object>)`	`XMLHttpRequest`	Executes this request chain and accepts the response callback.

Examples

L.esri.Geocoding.Tasks.geocode(L.esri.Geocoding.WorldGeocodingService).text('380 New York St, Redlands, California, 92373').run(function(err, results, response){
  console.log(results);
});

L.esri.Geocoding.Tasks.geocode(L.esri.Geocoding.WorldGeocodingService).address('380 New York St').city('Redlands').region('California').postal(92373).run(function(err, results, response){
  console.log(results);
});

//Using .within()
var southWest = L.latLng(37.712, -108.227),
    northEast = L.latLng(41.774, -102.125),
    bounds = L.latLngBounds(southWest, northEast); // Colorado

L.esri.Geocoding.Tasks.geocode(L.esri.Geocoding.WorldGeocodingService).text("Denver").within(bounds).run(function(err, response){
  console.log(response);
});

//Using .nearby()
var denver = L.latLng(37.712, -108.227);

L.esri.Geocoding.Tasks.geocode(L.esri.Geocoding.WorldGeocodingService).text("Highlands Ranch").nearby(denver, 20000).run(function(err, response){
  console.log(response);
});

Results Object

In the above examples the results object will look like this.

{
  results: [
    {
      latlng: L.LatLng,
      text: 'Formated Address',
      score: 100, // ranking of the certainty of the match
      properties: {
        // additonal info like specific address components like Country Code ect...
      }
    }
  ]
}

L.esri.Geocoding.Tasks.Suggest

Constructor

Constructor	Description
`new L.esri.Geocoding.Tasks.Suggest(url, options)` `L.esri.Geocoding.Tasks.suggest(url, options)`	Creates a new Suggest task. `L.esri.Geocoding.WorldGeocodingService` can be used as a reference to the ArcGIS Online World Geocoder.

Options

You can pass any options you can pass to L.esri.Tasks.Task.

Methods

Method	Returns	Description
`text(text <String>)`	`this`	The text to recive suggestions for.
`category(category <String>)`	The category to search for suggestions. By default no categogy. A list of categories can be found here https://developers.arcgis.com/rest/geocode/api-reference/geocoding-category-filtering.htm#ESRI_SECTION1_502B3FE2028145D7B189C25B1A00E17B
`within(bounds <L.LatLngBounds>)`	A bounding box to search for suggestions in.
`nearby(latlng <L.LatLng>, distance <Integer>)`	Searches for suggestions only inside an area around the LatLng. `distance` is in meters.
`run(callback <Function>, context<Object>)`	`XMLHttpRequest`	Executes this request chain and accepts the response callback.

Example

L.esri.Geocoding.Tasks.suggest().text('trea').nearby([45,-121], 5000).run(function(error, response){
  // response matches the suggest API response https://developers.arcgis.com/rest/geocode/api-reference/geocoding-suggest.htm#ESRI_SECTION1_FC3884A45AD24E62BD11C9888F1392DB
});

L.esri.Geocoding.Tasks.ReverseGeocode

Constructor

Constructor	Description
`new L.esri.Geocoding.Tasks.ReverseGeocode(url, options)` `L.esri.Geocoding.Tasks.reverseGeocode(url, options)`	Creates a new ReverseGeocode task. `L.esri.Geocoding.WorldGeocodingService` can be used as a reference to the ArcGIS Online World Geocoder.

Options

You can pass any options you can pass to L.esri.Tasks.Task.

Methods

Method	Returns	Description
`latlng(latlng <L.LatLng>)`	The L.LatLng object for which the address will be looked up.
`distance(distance <Integer>)`	The distance (in meters) around the point for which addresses will be looked up.
`language(language <String>)`	`this`	The language to return the address in.
`run(callback <Function>, context <Object>)`	`XMLHttpRequest`	Executes this request chain and accepts the response callback.

Example

L.esri.Geocoding.Tasks.reverseGeocode().latlng([48.8583,  2.2945]).run(function(error, result, response){
  // callback is called with error, result, and response.
  // result.latlng contains the latlng of the located address
  // result.address contains the address information
});

Development Instructions

Fork and clone Esri Leaflet Geocoder
cd into the esri-leaflet-geocoder folder
Install the dependencies with npm install
The example at /index.html should work
Make your changes and create a pull request

Dependencies

Resources

Issues

Find a bug or want to request a new feature? Please let us know by submitting an issue.

Contributing

Esri welcomes contributions from anyone and everyone. Please see our guidelines for contributing.

Terms and Conditions

In order the use the ArcGIS Online Geocoding Service you should signup for an ArcGIS for Developers account or purchase an ArcGIS Online Organizational Subscription.

Once you have an account you are good to go. Thats it!
Your users can search for as many places as they want. Esri defines this as "Geosearch" and its free. You only consume credits when you want to store the result of geocodes.
You are allowed to store the results of any geocoding you do if you pass the forStorage flag and a valid access token.
If you use this library in a revenue generating application or for goverment use you must upgrade to a paid account. You are not allowed to generate revenue while on a free plan.

This information is from the ArcGIS for Developers Terms of Use FAQ and the ArcGIS Online World Geocoder documentation

Licensing

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

A copy of the license is available in the repository's license.txt file.

[](Esri Tags: ArcGIS Web Mapping Leaflet Geocoding) [](Esri Language: JavaScript)

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Package last updated on 09 Jan 2015

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Install

esri-leaflet-geocoder

Esri Leaflet Geocoder

Example

L.esri.Geocoding.Controls.Geosearch

Constructor

Options

Methods

Events

Styling

Providers

Available Providers

Provider Options

Results Event

Result Object

L.esri.Geocoding.Services.Geocoding

Constructor

Options

Methods

Events

L.esri.Geocoding.Tasks.Geocode

Constructor

Options

Methods

Examples

Results Object

L.esri.Geocoding.Tasks.Suggest

Constructor

Options

Methods

Example

L.esri.Geocoding.Tasks.ReverseGeocode

Constructor

Options

Methods

Example

Development Instructions

Dependencies

Resources

Issues

Contributing

Terms and Conditions

Licensing

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