22 Mar
Many time we know only address don’t have coordinates or latitude and longitude. In such case we can use Google geo coder part . We have to pass only physical address and on basis of that Google can calculate geo coordinates. For example we have to map jaipur, India then we can pass it in Google map function as
initialize(‘jaipur,india’)
Basic JavaScript function look like this
<script type="text/javascript">
var geocoder;
var map;
//var address ="jaipur,india";
function initialize(address) {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 5,
center: latlng,
mapTypeControl: false,
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
navigationControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
if (geocoder) {
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (status != google.maps.GeocoderStatus.ZERO_RESULTS) {
map.setCenter(results[0].geometry.location);
var infowindow = new google.maps.InfoWindow(
{ content: '<b>'+address+'</b>',
size: new google.maps.Size(150,50)
});
var marker = new google.maps.Marker({
position: results[0].geometry.location,
map: map,
title:address
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
} else {
alert("No results found");
}
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
}
</script>
let’s put this in an html file to see output
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Rajeev Achra</title>
<style type="text/css">
#map_canvas {
width:450px;
height:150px;
border:1px solid #990000; }
</style>
<script type="text/javascript" src="https://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var geocoder;
var map;
//var address ="San Diego";
function initialize(address) {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 5,
center: latlng,
mapTypeControl: false,
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
navigationControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
if (geocoder) {
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (status != google.maps.GeocoderStatus.ZERO_RESULTS) {
map.setCenter(results[0].geometry.location);
var infowindow = new google.maps.InfoWindow(
{ content: '<b>'+address+'</b>',
size: new google.maps.Size(150,50)
});
var marker = new google.maps.Marker({
position: results[0].geometry.location,
map: map,
title:address
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
} else {
alert("No results found");
}
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
}
</script>
</head>
<body onload="initialize('jaipur,india')">
<div id="map_canvas" style="width:500px; height:350px;"></div>
</body>
</html>
simply run this html and you will got map with your location marker. You can modify function like can add custom marker,info window etc.
I am a software engineer who specializes in Internet applications. I have worked with a wide variety of technologies and programming languages to open source LAMP environments. I have more than 6 years of object-oriented programming experience and am highly proficient in ActionScript, PHP, MYSQL, JavaScript, Jquery and a multitude of other technologies used in modern web applications.
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