topic Re: How to show both tiled map services on the same map? in ArcGIS API for Flex Questions

How to show both tiled map services on the same map?

LeiZhou — Thu, 19 Jul 2012 15:09:58 GMT

I have several tiled map services (e.g., population, land use) that I need to let users to select so that they can show up on the map. But I also need to show the base map like street map as background, which is also a tiled map service. Since they are all tiled and I guess I have to use <esri:ArcGISTileMapServiceLayer>, my question is that how can I show both base map(street map) and my own map(population) on the same map? Thanks!

Re: How to show both tiled map services on the same map?

AustinDavis — Fri, 20 Jul 2012 11:50:59 GMT

I usually toggle my basemaps using a button bar.

Re: How to show both tiled map services on the same map?

ChristopherBlinn1 — Fri, 20 Jul 2012 12:13:00 GMT

As long as the two services are cached at the same levels they should draw on top of one another. I have tiled map services draw on top of each other. I use the Flex Viewer (version 2.5) for most of my websites.

For instance I have a basemap and flood zones that show together.

If you are using the viewer, just place your tiled service in the operational layers. For example:

<basemaps> <layer label="My Basemap"            type="tiled"           visible="true"          url="http://server/ArcGIS/rest/services/BASEMAP/MapServer"/> </basemaps> <operationallayers> <layer label="Flood Zones"            type="tiled"           visible="true"          url="http://server/ArcGIS/rest/services/FloodZones/MapServer"/> </operationallayers>

I'd attach the MapMananager.mxml from the viewer, but it is quite extensive.

In theory, as long as you place the services in the proper drawing order then you both should draw on top of one another.

Another thing is make sure your cache tiles are in a PNG format because JPEG's do not support transparency.

Hope this helps!

Best,
Chris B.

Re: How to show both tiled map services on the same map?

LeiZhou — Mon, 23 Jul 2012 20:27:54 GMT

I usually toggle my basemaps using a button bar.

Thanks a lot!