topic Basemap switch with change in map scale. in ArcGIS Viewer for Flex Questions

Basemap switch with change in map scale.

HenryMoore — Wed, 27 Jul 2011 20:19:21 GMT

Is it difficult to use scale dependancy to switch between Street_Map, Imagery, and topo's in the new Flex Viewer 2.3.1? I would like to leave StreetMap visible on initial extent w/option of switching to topo's but automatically go to aerial imagery when zoomed in beyond visible extent of StreetMap or topo. I know in previous versions of the viewer this was handled in the MapManager.mxml code using the following:

private function checkScale(evt:Event):void
{
var tl:ArcGISTiledMapServiceLayer;
//If ESRI Street maps <9000 Turn off ESRI Street map and switch to imagery.
if(map.scale < 9000)
{
tl = map.getLayer("Street Map") as ArcGISTiledMapServiceLayer;
tl.visible = false;
tl = map.getLayer("Satellite Map") as ArcGISTiledMapServiceLayer;
tl.visible = true;
}
if(map.scale > 9000)
{
tl = map.getLayer("Street Map") as ArcGISTiledMapServiceLayer;
tl.visible = true;
tl = map.getLayer("Satellite Map") as ArcGISTiledMapServiceLayer;
tl.visible = false;
}
}

Re: Basemap switch with change in map scale.

HenryMoore — Fri, 29 Jul 2011 14:37:14 GMT

Thanks Robert Scheitlin! I added the following to the "private function config(event:AppEvent):void"
and the code worked fine.

map.addEventListener(ZoomEvent.ZOOM_END, checkScale);

Re: Basemap switch with change in map scale.

BeckyCarr — Fri, 09 Mar 2012 15:06:41 GMT

How would this be accomplished in 2.5?

Re: Basemap switch with change in map scale.

RobertScheitlin__GISP — Fri, 09 Mar 2012 15:29:46 GMT

Becky,

This can all be done using the eMapSwitcher widget now. Just read the readme.txt for details.

http://www.arcgis.com/rc/item.html?id=7156b0acf6574f848ddfd3d7e155746b

Don't forget to click the top arrow (promote) as shown below:

Re: Basemap switch with change in map scale.

BeckyCarr — Fri, 09 Mar 2012 18:48:32 GMT

Works great! Thank you.