Topographic Map

View live sample

Description

This sample shows how to add a topographic basemap layer to your application. The sample uses a cached map service from ArcGIS Online. You can browse the ArcGIS Online site for additional online basemap and reference map services or publish your own geographic data as a service using ArcGIS Server.

This sample sets the initial extent of the map to an area in San Francisco using following code:

   var initExtent = new esri.geometry.Extent({"xmin":-13635568.034589134,"ymin":4541606.359162286,"xmax":-13625430.573712826,"ymax":4547310.472398059,"spatialReference":{"wkid":102100}});
   map = new esri.Map("map",{extent:initExtent});

If you want the map to start with a different initial extent you can easily determine the extent values using your browser's debugging tools. Below are the steps for calculating a new extent using Firefox with Firebug installed.

Run the application.
Zoom to the new extent.
Enable Firebug and click the Console tab
Enter the following:
```
dojo.toJson(map.extent.toJson());
```
Copy the results and paste them into the JavaScript code replacing the existing initExtent.

Note: You can perform the same steps using Developer Tools in Internet Explorer or Chrome.

Code

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <title> Topographic Map</title>

    <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/1.6/js/dojo/dijit/themes/tundra/tundra.css">

    <style>

      html, body { height: 100%; width: 100%; margin: 0; padding: 0; }

    </style>

    <script type="text/javascript">var djConfig = {parseOnLoad: true};</script>

    <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.6"></script>

    <script type="text/javascript">

      dojo.require("dijit.layout.BorderContainer");

      dojo.require("dijit.layout.ContentPane");

      dojo.require("esri.map");

      var map;



      function init() {

        var initExtent = new esri.geometry.Extent({"xmin":-13635568,"ymin":4541606,"xmax":-13625430,"ymax":4547310,"spatialReference":{"wkid":102100}});

        map = new esri.Map("map",{extent:initExtent});

        //Add the topographic layer to the map. View the ArcGIS Online site for services http://arcgisonline/home/search.html?t=content&f=typekeywords:service    

        var basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer");

        map.addLayer(basemap);

        

        //resize the map when the browser resizes - view the 'Resizing and repositioning the map' section in 

        //the following help topic for more details http://helpdev.esri.com/EN/webapi/javascript/arcgis/help/jshelp_start.htm#jshelp/inside_guidelines.htm

        var resizeTimer;

        dojo.connect(map, 'onLoad', function(theMap) {

          dojo.connect(dijit.byId('map'), 'resize', function() {  //resize the map if the div is resized

            clearTimeout(resizeTimer);

            resizeTimer = setTimeout( function() {

              map.resize();

              map.reposition();

            }, 500);

          });

        });

      }



      dojo.addOnLoad(init);

    </script>

  </head>

  

  <body class="tundra">

    <div dojotype="dijit.layout.BorderContainer" design="headline" gutters="false"

    style="width: 100%; height: 100%; margin: 0;">

      <div id="map" dojotype="dijit.layout.ContentPane" region="center" style="overflow:hidden;">

      </div>

    </div>

  </body>



</html>