Add a Geocode to a Custom Address Field

The method to get geocodes differs between standard and custom address fields. To give your users precise geographical information, add geocode information to a custom address field with Apex, Visualforce, and a map API.

Available in: both Salesforce Classic (not available in all orgs) and Lightning Experience

Available in: all editions

User Permissions Needed
To modify user interface settings:	Customize Application

Create an Apex class that retrieves latitude and longitude from your preferred map API. This example calls the Google Map API as defined in the String variable endpoint.

1public class GeoCodeExample {
2    @future(callout=true)
3    public static void parseJSONResponse() {  
4        double lat;
5        double lng;
6        String city = null;
7        String street = null;
8           String stateCode = null; 
9        String countryCode = null;
10        
11        Account record = [SELECT Mailing_Address__c FROM Account WHERE Id = 'Account ID'];
12        Address customAddress = record.Mailing_Address__c;
13        
14        //Remove white spaces from address components
15        if(customAddress.getCity() != null){
16             city = customAddress.getCity().deleteWhitespace();
17        }
18        if(customAddress.getStreet() != null){
19             street = customAddress.getStreet().deleteWhitespace();
20        }
21        if(customAddress.getStateCode() != null){
22             stateCode = customAddress.getStateCode();
23        }
24        if(customAddress.getCountryCode() != null){
25             countryCode = customAddress.getCountryCode();
26        }    
27        
28        //concatenate strings
29        String address = street+city+stateCode+countryCode;
30        
31        String key='API key';
32        Http httpProtocol = new Http();
33        // Create HTTP request to send.
34        HttpRequest request = new HttpRequest();
35        // Set the endpoint URL.
36        // USING GOOGLE MAP API 
37        String endpoint = 'https://maps.googleapis.com/maps/api/geocode/json?address='+address+'&key='+key;
38        request.setEndPoint(endpoint);
39        // Set the HTTP verb to GET.
40        request.setMethod('GET');
41        // Send the HTTP request and get the response.
42        // The response is in JSON format.
43        HttpResponse response = httpProtocol.send(request);
44      
45       // Parse JSON response to get all the totalPrice field values.
46        JSONParser parser = JSON.createParser(response.getBody());
47        
48        while (parser.nextToken() != null) {
49            if ((parser.getCurrentToken() == JSONToken.FIELD_NAME) && 
50                (parser.getText() == 'lat')) {
51                parser.nextToken();
52                // Get latitude
53                lat = parser.getDoubleValue();
54           
55                parser.nextToken();
56                parser.nextToken();
57                //Get longitude    
58                lng = parser.getDoubleValue();
59                 } 
60              }
61        // Update lat long of account record
62        record.Mailing_Address__Latitude__s=lat;
63        record.Mailing_Address__Longitude__s=lng;
64        update record;
65    }
66}

Create a Visualforce page that triggers the geocode service from the map API.

1<apex:page id="pg" controller="GeoCodeExample">
2<apex:form >
3    <apex:pageBlock id="pb">
4        <apex:pageBlockButtons >
5            <apex:commandButton value="Get GeoCode For Custom Address Field" 
6            action="{!parseJSONResponse}"/>
7        </apex:pageBlockButtons>
8    </apex:pageBlock>
9</apex:form>
10</apex:page>

On the Visualforce page, click Get GeoCode For Custom Address Field to trigger the code. To see the latitude and longitude values populated, query the account information in Developer Console.

To automate the process of updating custom address fields with latitude and longitude, set up a trigger to invoke the Apex class.

The example in this topic uses a third-party map API to retrieve latitude and longitude. Using a Salesforce trigger to invoke this Apex class calls the map API each time the class is invoked. This action can result in charges from your API provider.

Note

Custom Address Fields Developer Guide

Add a Geocode to a Custom Address Field