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Revision as of 11:03, 4 January 2013 by jasfox (Talk | contribs)

HERE Maps API - How to draw a polygon

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This article explains how to draw a polygon on Nokia Maps

Article Metadata
Tested with
Devices(s): Internet Explorer, Firefox, Google Chrome, Opera
Compatibility
Platform(s): Web browser
Dependencies: Nokia Maps 2.2.3
Article
Keywords: Nokia Maps, JavaScript, shapes, polygon
Created: Maveric (21 Jun 2011)
Updated: avnee.nathani (31 Dec 2011)
Last edited: jasfox (04 Jan 2013)

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 Terms and Conditions and check the Pricing Plans 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 for free following the instructions here

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 GeoCoordinates 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

<!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>Polygon</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script type="text/javascript"
src="http://api.maps.nokia.com/2.2.3/jsl.js" charset="utf-8">
</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">
/////////////////////////////////////////////////////////////////////////////////////
// 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");
 
 
//
/////////////////////////////////////////////////////////////////////////////////////
 
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("mapContainer"), // 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 the Nokia Maps API

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

You may also access the interactive API explorer

Tested with

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

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