Getting IntialExtent of the ArcGISDynamicMapServiceLayer

tejasnadkarni

I am using arcgis javascript api in my application and working with a dynamic map service resource exposed by the ArcGIS Server REST API . Hence I am making using of the ArcGISDynamicMapServiceLayer to load.

But after adding the layer of ArcGISDynamicMapServiceLayer to the map, the map is not taking projection of this layer.

So i tried using GeometryService.project by passing the ProjectParameters() and i am trying to set the  ArcGISDynamicMapServiceLayer.initialExtent and project toward it.

But i am getting ArcGISDynamicMapServiceLayer.initialExtent as

{

spatialReference: { wkid: 4326}

type: "extent"

xmax: 180

xmin: -180

ymax: 90

ymin: -90

}

on the first load and then after that works fine.

So what is the best way if i just want to load a map and then project towards ArcGISDynamicMapServiceLayer layer on the map?

kenbuja

In your code, you're converting the the geographic extent to Web Mercator, but you're then trying to set the map's extent to the geographic extent. This is shown in Firebug's debugging console.

Use this code instead.

on(map, "layer-add-result", function () {
  var extent = webMercatorUtils.geographicToWebMercator(dynamicLayer.initialExtent);
  map.setExtent(extent, true);
});

Here's the updated Fiddle.