The Google Maps geocoding service fails to provide accurate location information

I am currently attempting to utilize the Google Maps Geocoding API within my JavaScript code. Below is the snippet I have written:

var geocoder = new google.maps.Geocoder();

function geocodeAddress() {
  var address = document.getElementById("address").value;
  geocoder.geocode({"address": address}, function(results, status) {
    if (status === google.maps.GeocoderStatus.OK) {
      alert(JSON.stringify(results[0].geometry))
    } else {
      alert("Geocode was not successful for the following reason: " + status);
    }
  });
}

The result obtained for a correct address displays as follows:

{"location":{},"location_type":"ROOFTOP","viewport":{"O":{"O":52.2080810197085,"j":52.2107789802915},"j":{"j":21.018444019708568,"O":21.02114198029153}}}

The issue here lies in the incorrect setting of the location. Any suggestions on what could be causing this problem?

Answer №1

Location property is represented as a google.maps.LatLng object, which requires explicit conversion to display lat/lng values, for example:

var sval = results[0].geometry.location.toString();

You can also access the lat/lng values using specific functions:

var lat = results[0].geometry.location.lat();
var lng = results[0].geometry.location.lng(); 

To obtain a string representation of the Location property, you could replace:

alert(JSON.stringify(results[0].geometry));

with:

alert(JSON.stringify(results[0].geometry, convertLatLngValue, 4));

where

function convertLatLngValue(key, value)
{
    if (key == "lat" || key == "lng") {
        return value();
    }    
    else {
        return value;
    }
}

Live demonstration

var geocoder;
var map;

function initialize() {
    geocoder = new google.maps.Geocoder();
    var latlng = new google.maps.LatLng(-34.397, 150.644);
    var mapOptions = {
        zoom: 8,
        center: latlng
    };
    map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
}

function codeAddress() {
    var address = document.getElementById('address').value;
    geocoder.geocode({ 'address': address }, function (results, status) {
        if (status === google.maps.GeocoderStatus.OK) {
            var json = JSON.stringify(results[0].geometry, convertLatLngValue, 4);
            document.getElementById('output').innerHTML = json;
            map.setCenter(results[0].geometry.location);
            var marker = new google.maps.Marker({
                map: map,
                position: results[0].geometry.location
            });
        } else {
            alert('Geocoding was not successful due to: ' + status);
        }
    });
}

function convertLatLngValue(key, value)
{
    if (key === "lat" || key === "lng") {
        return value();
    }    
    else {
        return value;
    }
}

google.maps.event.addDomListener(window, 'load', initialize);
html, body, #map-canvas {
   height: 240px;
   margin: 0px;
   padding: 0px;
}

#panel {
   position: absolute;
   top: 5px;
   left: 50%;
   margin-left: -180px;
   z-index: 5;
   background-color: #fff;
   padding: 5px;
   border: 1px solid #999;
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
 <div id="panel">
        <input id="address" type="textbox" value="Sydney, NSW">
        <input type="button" value="Geocode" onclick="codeAddress()">
 </div>
 <div id="map-canvas"></div>
 <pre id="output"></pre>

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