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Revision as of 13:10, 11 July 2012 by Oskar Bukolt (Talk | contribs)

HERE Maps API - How to draw a circle

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This article explains how to draw a circle on Nokia Maps.

Article Metadata
Tested with
Devices(s): Internet Explorer, Firefox, Google Chrome, Safari
Compatibility
Platform(s): Web browser
Dependencies: Nokia Maps 2.2.0
Article
Created: Maveric (21 Jun 2011)
Updated: avnee.nathani (31 Dec 2011)
Last edited: Oskar Bukolt (11 Jul 2012)

Contents

Prerequisites

Nokia Maps API supported web browser (basically any modern web browser)

Important note about maps credentials

Nokia provides several services options within the Maps API offering. The service is free to use, but you must obtain and use authentication and authorization credentials to use the services. Please read the Location API Business Models and Usage Restrictions page to decide which business model best fits your needs. Authentication requires unique Maps API credentials, namely an AppId and a token. You can get these credentials free from the Nokia Developer API Registration page.

Implementation

The API definition:

new nokia.maps.map.Circle (center, radius, props)

In the example below, we will create new circles with an increasing radius and add them all one by one to the map display in a loop.

Example code

<!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>
<title>Circle</title>
<meta http-equiv="X-UA-Compatible" content="IE=7; IE=EmulateIE9"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<script type="text/javascript" charset="UTF-8"
src="http://api.maps.nokia.com/2.2.1/jsl.js?with=all">
</script>
</head>
<body>
 
<div id="mapContainer" style="z-index: -1; left:0px; top:0px; width: 100%; height: 80%; position: absolute;"></div>
<script type="text/javascript">
/*<![CDATA[*/
/////////////////////////////////////////////////////////////////////////////////////
// Don't forget to set your API credentials
//
// Replace with your appId and token which you can obtain when you
// register on http://api.developer.nokia.com/
//
nokia.Settings.set( "appId", "YOUR APP ID GOES HERE");
nokia.Settings.set( "authenticationToken", "YOUR AUTHENTICATION TOKEN GOES HERE");
 
//
/////////////////////////////////////////////////////////////////////////////////////
 
var mapContainer = document.getElementById("mapContainer");
 
var map = new nokia.maps.map.Display(mapContainer, {
 
center: [19.119, 72.8957],
zoomLevel: 4,
components:[new nokia.maps.map.component.Behavior()]
});
 
 
map.objects.add(new nokia.maps.map.Circle(
// The center or the circle will be on longitude 50.0361, latitude 8.5619
[19.15, 73.91],
// The radius of the circle in meters
450000,
{
 
pen: {
strokeColor: "#829f",
lineWidth: 2
},
brush: {
color: "#829f"
}
 
}
));
/*]]>*/
</script>
</body>
</html>

Screenshot

NokiaMapsCircle.png

For more on Nokia Maps API

Please check out the Nokia Maps API full documentation and API reference here:

You may also access the interactive Nokia Maps API playground,

Tested with

  • Google Chrome 11.0x
  • Mozilla Firefox 5.0
296 page views in the last 30 days.

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