Bogdan,

Thanks for the quick reply. What I currently have is:

Trigger:
 

/*// Trigger runs getLocation() on Accounts with no Geolocation

trigger SetGeolocation on Account (after insert, after update) {
    for (Account a : trigger.new)
    if (a.Location__Latitude__s == null)
          LocationCallouts.getLocation(a.id);
}*/

// Trigger runs getLocation() on Accounts with no Geolocation

trigger SetGeolocation on Account (after insert, after update) {
List<Id> calloutIds = new List<Id>();    
for (Account a : trigger.new){
        if(system.isFuture() == FALSE){
             calloutIds.add(a.id);
        }
    }

LocationCallouts.getLocation(calloutIds);
}

Apex class location callouts:
 

public class LocationCallouts {

     @future (callout=true)  // future method needed to run callouts from Triggers
      static public void getLocation(List<Id> accountIds){
        // gather account info
           for(Account a : [SELECT BillingCity,BillingCountry,BillingPostalCode,BillingState,BillingStreet FROM Account WHERE id in: accountIds]){

        // create an address string
        String address = '';
        if (a.BillingStreet != null)
            address += a.BillingStreet +', ';
        if (a.BillingCity != null)
            address += a.BillingCity +', ';
        if (a.BillingState != null)
            address += a.BillingState +' ';
        if (a.BillingPostalCode != null)
            address += a.BillingPostalCode +', ';
        if (a.BillingCountry != null)
            address += a.BillingCountry;

        address = EncodingUtil.urlEncode(address, 'UTF-8');

        // build callout
        Http h = new Http();
        HttpRequest req = new HttpRequest();
        req.setEndpoint('http://maps.googleapis.com/maps/api/geocode/json?address='+address+'&sensor=false');
        req.setMethod('GET');
        req.setTimeout(60000);

        try{
            // callout
            HttpResponse res = h.send(req);

            // parse coordinates from response
            JSONParser parser = JSON.createParser(res.getBody());
            double lat = null;
            double lon = null;
            while (parser.nextToken() != null) {
                if ((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&
                    (parser.getText() == 'location')){
                       parser.nextToken(); // object start
                       while (parser.nextToken() != JSONToken.END_OBJECT){
                           String txt = parser.getText();
                           parser.nextToken();
                           if (txt == 'lat')
                               lat = parser.getDoubleValue();
                           else if (txt == 'lng')
                               lon = parser.getDoubleValue();
                       }

                }
            }

            // update coordinates if we get back
            if (lat != null){
                a.Location__Latitude__s = lat;
                a.Location__Longitude__s = lon;
                update a;
            }

        } catch (Exception e) {
        }
    }
}
}

With this code, no update is made to the custom field "location ( a.Location__Latitude__s, 
a.Location__Longitude__s).

I also started a new thread, as I had taken the code back to what I had before I put in your suggestions and it made it work again. I'm not sure what I am missing/did incorrectly.

The other thread is seen here: https://developer.salesforce.com/forums/#!/feedtype=SINGLE_QUESTION_DETAIL&dc=Apex_Code_Development&criteria=ALLQUESTIONS&id=906F0000000B3icIAC


When I try running the code above, like you had suggested, for some reason it is not updating the custom field with geocode when you save a new address. I found this article as well: https://bryandf11.wordpress.com/2011/08/22/geocoding-in-apex-triggers-callouts-and-future-methods/

It seem that every resource I find online sahys do it as a batch apex, but I am a little lost when I try to do that.

With the code above, I get this error: "Content cannot be displayed: Invalid type or missing latitude value for attribute <apex:mapMarker id="j_id3" position>."

I am trying to pull the map in with apexmap instead of javascript. If I can clarify anything please let me know.