Map with initial extent and basemap not showing dynamic layer until after a map event

DirkVandervoort — Mon, 10 Dec 2012 18:21:25 GMT

Simple scenario:

I have a dynamic map service (operationalLayer) that I'd like to display on an ArcGIS basemap with the initial extent defined. The operationalLayer is secured and is on my server.

When I add the layers using the code below, the operationalLayer does not become visible until a map event - like a pan or zoom.

I've tried numerous permutations or this code bit still can not get the operationalLayer to be visible by default.

How can I get the operationalLayer to display?

    
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.2"></script>
<script type="text/javascript">
dojo.require("esri.map"); 

function init() {
    var initExtent = new esri.geometry.Extent({"xmin":-12939189,"ymin":4198361,"xmax":-12713834,"ymax":4302895,"spatialReference":{"wkid":3421}});
    var map = new esri.Map("map"); 
    //var map = new esri.Map("map",{extent:initExtent}); // DOES NOT WORK, extent is correct for base map
                                                         // but the operationalLayer is not in the correct geography
    //map.setExtent(initExtent);  // This works BUT the 
                                  // operationalLayer doesn't display until a map event 
                                  // (e.g., pan or zoom)


   var basemap = new ArcGISTiledMapServiceLayer("http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer");
    map.addLayer(basemap);  
    //map.setExtent(initExtent);  // This works BUT the 
                                  // operationalLayer doesn't display until a map event 
                                  // (e.g., pan or zoom)

   var operationalLayer = new ArcGISDynamicMapServiceLayer("http://MyServer/ArcGIS/rest/services/MyMapService/MapServer?token=someBigHugeGinormousRandomString");
   map.addLayer(operationalLayer);
   map.setExtent(initExtent);    // This works BUT the 
                                  // operationalLayer doesn't display until a map event 
                                  // (e.g., pan or zoom)
}

  dojo.addOnLoad(init);
</script>

What's really troublesome is that the code below (same scenario but without the secured map service) works.

    <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.2"></script>
    <script type="text/javascript">
      dojo.require("esri.map");

      function init() {
        //configure map zoom rectangle fill by setting style by calling esri.symbol.SimpleFillSymbol.toJson()
        var initExtent = new esri.geometry.Extent({"xmin":-13814922,"ymin":0,"xmax":6222585,"ymax":5351408,"spatialReference":{"wkid":102100}});
        var map = new esri.Map("map",{extent:initExtent});       
 
 var basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer");
        map.addLayer(basemap);
 
 var operationalLayer = new esri.layers.ArcGISDynamicMapServiceLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer");
 map.addLayer(operationalLayer);
      }

      dojo.addOnLoad(init);
    </script>

Re: Map with initial extent and basemap not showing dynamic layer until after a map e

derekswingley1 — Mon, 10 Dec 2012 20:57:19 GMT

Since you're using an arcgis.com basemap, specify your initial extent in web mercator, not Nevada State Plane (wkid 3421).

topic Map with initial extent and basemap not showing dynamic layer until after a map event in ArcGIS JavaScript Maps SDK Questions

Map with initial extent and basemap not showing dynamic layer until after a map event

Re: Map with initial extent and basemap not showing dynamic layer until after a map e