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Revision as of 18:40, 31 December 2011 by rahulvala (Talk | contribs)

HERE Maps API - How to draw a polygon

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Article Metadata
Compatibility
Platform(s): Web browser
Article
Created: (31 Dec 2011)
Updated: avnee.nathani (31 Dec 2011)
Last edited: rahulvala (31 Dec 2011)

Contents

Introduction

In this article we will see how to draw a polygon on Nokia Maps.

Prerequisites

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

Important about Maps credentials

Nokia provides several services options within the Maps API offering. The service is free to use, but if you complete the free registration process and obtain authentication and authorization credentials, your application will have priority access to the service and will thus avoid a potential performance penalty. 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 from the Nokia Developer API Registration page.

Implementation

The API definition:

    new nokia.maps.map.Polygon (path, props) 
 
nokia.maps.geo.Strip | nokia.maps.geo.Coordinate[]} path The path as coordinate strip.
nokia.maps.map.Polygon.Properties} props The initial values of the specified properties.

To draw the Polygon we will create a new geo Strip with Coordinates and then a new Polygon will be instantiated using it. The Properties are defined the same way for drawing a Circle, Polyline or a Polygon.

Example code

<html>
<head>
<script type="text/javascript"
src="http://api.maps.nokia.com/2.0.0/jsl.js" charset="utf-8">
</script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div id="map" style="width:100%; height:80%;"></div>
</body>
<script type="text/javascript">
 
 
myGeoStrip = new nokia.maps.geo.Strip([52,13,100,48,2,100,48,16,100,52,13,100], "values lat lng alt");
 
var map = new nokia.maps.map.Display(document.getElementById("map"), // new instance of Ovi Maps
{
 
components: [ new nokia.maps.map.component.Behavior(),
new nokia.maps.map.component.ZoomBar(),
new nokia.maps.map.component.Overview(),
new nokia.maps.map.component.TypeSelector(),
new nokia.maps.map.component.ScaleBar()],
'zoomLevel': 4,
'center':[53.1, 13.1]
});
 
map.set("baseMapType", map.SATELLITE);
 
//new nokia.maps.map.Polygon (path, props)
/*
{nokia.maps.geo.Strip | nokia.maps.geo.Coordinate[]} path The path as coordinate strip.
{nokia.maps.map.Polygon.Properties} props The initial values of the specified properties.
*/

 
 
map.objects.add(
new nokia.maps.map.Polygon(myGeoStrip,
{
precision: 36,
simplify: 16,
fillColor: "FFFFCC",
color: "#829f",
width: 8
}));
 
</script>
</body>
</html>

Screenshot

NokiaMapsPolygon.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 5.0b
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