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Reverse Geocoding

To integrate Oracle APEX with Google Maps | Reverse Geocoding,
I have followed below steps.

Step 1: Google API Key must be obtained. Get Google API Key.

Step 2: Create a page.

Step 5: Add below js in Page HTML Header.

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Reverse Geocoding</title>
    <style>
        /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
        
        #map {
            height: 100%;
        }
        /* Optional: Makes the sample page fill the window. */
        
        html,
        body {
            height: 100%;
            margin: 0;
            padding: 0;
        }
        
        #floating-panel {
            position: absolute;
            top: 10px;
            left: 25%;
            z-index: 5;
            background-color: #fff;
            padding: 5px;
            border: 1px solid #999;
            text-align: center;
            font-family: 'Roboto', 'sans-serif';
            line-height: 30px;
            padding-left: 10px;
        }
        
        #floating-panel {
            position: absolute;
            top: 5px;
            left: 50%;
            margin-left: -180px;
            width: 350px;
            z-index: 5;
            background-color: #fff;
            padding: 5px;
            border: 1px solid #999;
        }
        
        #latlng {
            width: 225px;
        }
        
        #floating-panel {
            margin-top: 50px;
        }
    </style>
</head>

<body>
    <div id="floating-panel">
        <input id="latlng" type="text" value="40.714224,-73.961452">
        <input id="submit" type="button" value="Reverse Geocode">
    </div>
    <div id="map"></div>
    <script>
        function initMap() {
            var map = new google.maps.Map(document.getElementById('map'), {
                zoom: 8,
                center: {
                    lat: 40.731,
                    lng: -73.997
                }
            });
            var geocoder = new google.maps.Geocoder;
            var infowindow = new google.maps.InfoWindow;

            document.getElementById('submit').addEventListener('click', function() {
                geocodeLatLng(geocoder, map, infowindow);
            });
        }

        function geocodeLatLng(geocoder, map, infowindow) {
            var input = document.getElementById('latlng').value;
            var latlngStr = input.split(',', 2);
            var latlng = {
                lat: parseFloat(latlngStr[0]),
                lng: parseFloat(latlngStr[1])
            };
            geocoder.geocode({
                'location': latlng
            }, function(results, status) {
                if (status === 'OK') {
                    if (results[0]) {
                        map.setZoom(11);
                        var marker = new google.maps.Marker({
                            position: latlng,
                            map: map
                        });
                        infowindow.setContent(results[0].formatted_address);
                        infowindow.open(map, marker);
                    } else {
                        window.alert('No results found');
                    }
                } else {
                    window.alert('Geocoder failed due to: ' + status);
                }
            });
        }
    </script>

    <script async defer src="https://maps.googleapis.com/maps/api/js?key=MY_GOOGLE_API_KEY&callback=initMap">
    </script>
</body>

</html>

Note:
In the end of code, you can find link,

<script async defer src="https://maps.googleapis.com/maps/api/js?key=MY_GOOGLE_API_KEY&callback=initMap">

You must replace MY_GOOGLE_MAP_API_KEY with your valid Google MAP API Key.

Output: The moment you click on "Reverse GeoCode" button, you will have an output as like below.


That's it. Happy APExing!!!...

Faced Issues: I would like to share all the issues which i faced when i was integrating Oracle APEX with Google Maps.

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