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How to use Google Maps to display coordinates received in SMS
Video tutorial
Introduction
This solution displays coordinates received in SMS messages using
the Google Maps service. To implement this solution, you need the following:
- An installed copy of Ozeki NG
SMS Gateway.
- A GSM modem attached to your
computer, that needs to be configured
in Ozeki NG for receiving.
- A MySQL database server installed and
configured in Ozeki NG.
- IIS webserver
- PHP
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Figure 1.) Example screen shot of solution
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How to create the solution
The first step is to setup Ozeki NG SMS
Gateway and configure it with MySQL. This step is explained in the
How to send/receive SMS using MySQL
guide. Once you have Ozeki NG SMS Gateway and MySQL configured, your
incoming SMS messages will be automatically inserted into
a database table called: ozekimessagein.
The next step is to install IIS and PHP. IIS is part of the Windows XP Pro
installation CD ROM and PHP can be downloaded from www.php.net.
The installation of IIS and PHP will create the wwwroot directory
on your system. By default it is the "C:\Inetpub\wwwroot" directory.
If you put PHP files (with .php) extension into this directory, they
will be executed by the PHP engine, when they are opened with a webbrowser.
After PHP and IIS has been installed, PHP can be used to read the
SMS from the MySQL database table. When an SMS has been read,
it's content can be processed to extract the longitude and the
latitude coordinates. These coordinates can be displayed in Google
maps.
To display the longitude and latitude coordinates in Google maps, you
need to create a PHP file (called googlemap.php) with the following content:
C:\Inetpub\wwwroot\googlemap.php
<?php
//Connect to MySQL
$con=mysql_connect("localhost","root","qwe123");
if (!$con) {
die('Cannot connect: '.mysql_error());
}
mysql_select_db("test");
$sql = "select msg from ozekimessagein order by senttime desc limit 1";
$res = mysql_query($sql);
$cn = mysql_num_rows($res);
if ($cn>0) {
list($data) = mysql_fetch_row($res);
# echo "Received SMS content: $data";
list($vehicleID,$long,$lat) = split(',',$data);
# echo "<br>Vehicle ID: $vehicleID<br>";
# echo "Long: $long<br>";
# echo "Lat: $lat<br>";
} else {
# echo "There is no data in the MySQL database";
}
mysql_close($con);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Maps JavaScript API Example</title>
<script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAA"
type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
function load() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
map.setCenter(new GLatLng(<?php echo"$long, $lat";?>), 13);
var marker=new GMarker(new GLatLng(<?php echo"$long, $lat";?>), {draggable: false});
map.addOverlay(marker);
}
}
//]]>
</script>
</head>
<body onload="load()" onunload="GUnload()">
<div id="map" style="width: 500px; height: 300px"></div>
</body>
</html>
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This file uses the Google Maps API. Please note that this PHP script
will not run by default. The reason for this is that you need to have
a unique ID assigned to the Google Maps API. This ID can be generated
on the Google Maps website:
http://code.google.com/apis/maps/.
During generation, you need to provide a website name, such as
www.anyhost.com.
If you don't have a website name assigned to your computer, you can
create one in the Windows hosts file, which is located in the following
location: C:\WINDOWS\system32\drivers\etc
Once the PHP file is created and the unique Google Maps ID is inserted
into the file, you are ready to view the PHP webpage in a webbrowser.
The webbrowser will display a map with the latest coordinate found
in the database.
Check out the video tutorials for more details.
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