HERE Maps API - How to create custom graphics marker
Oskar Bukolt
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[[File:NokiaMapsGraphicsMarker.png|600px]] | [[File:NokiaMapsGraphicsMarker.png|600px]] | ||
| − | ==For more on Nokia Maps API== | + | ==For more on the Nokia Maps API== |
Please check out the Nokia Maps API full documentation and API reference here: | Please check out the Nokia Maps API full documentation and API reference here: | ||
| − | * http:// | + | * [http://developer.here.net/javascript_api Nokia Maps API] |
| − | You may also access the interactive | + | You may also access the interactive API explorer |
| − | * http:// | + | * [http://developer.here.net/javascript_api_explorer API explorer] |
Revision as of 15:04, 3 January 2013
This article explains how to create a custom graphics marker on Nokia Maps using the GFX library. The example creates a transparent ellipse which the user can drag around the map.
Article Metadata
Tested with
Compatibility
Article
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
We will create a map with the set of basic user controls, and center the map with a zoom level. The testLayer refers to a new map Container we create. We then add the container to the map objects and graphicsContext variable will have an instance of the GFX library Graphics object.
Example code
Please note that the images are zoomed to be visible on the current zoom level. You would need to zoom in more towards the images to see the ones that maybe layered under the top images.
<!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>Custom Graphics Markers</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script type="text/javascript"
src="http://api.maps.nokia.com/2.2.1/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");
//
/////////////////////////////////////////////////////////////////////////////////////
var map = new nokia.maps.map.Display(document.getElementById("mapContainer"), // new instance of Nokia 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': 10,
'center':[19.119, 72.8957]
});
map.set("baseMapType", map.NORMAL);
// Create a test layer
var testLayer = new nokia.maps.map.Container();
map.objects.add(testLayer);
var graphicsContext = new nokia.maps.gfx.Graphics();
graphicsContext.beginImage(64,64);
// Compress a semi-transparent red color
var my_fill_color = nokia.maps.gfx.Color.compress(255, 0, 0, 127);
graphicsContext.set("fillColor", my_fill_color);
graphicsContext.set("strokeColor", "#000");
graphicsContext.set("lineWidth", 4);
graphicsContext.drawEllipse(1, 1, 48, 48);
graphicsContext.fill();
graphicsContext.stroke();
var myGfxMarker = new nokia.maps.map.Marker(
{latitude:19.119, longitude:72.8957},
{
icon: new nokia.maps.gfx.GraphicsImage(graphicsContext.getIDL()),
visibility: true,
anchor: new nokia.maps.util.Point(0,0),
draggable: true
}
);
testLayer.objects.add(myGfxMarker);
</script>
</body>
</html>
Screenshot
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
