AGSRasterLayer not working. Debugging suggestions?

[AndriyFedin]

I'm trying to display an elevation map layer using AGSRasterLayer, but it doesn't appear on the map. 
I took the code from the AGSRasterLayer example, and it works perfectly fine with the URL from the example. But when I change the URL to the imageServer URL with the elevation map, the layer doesn't show up.

The elevation map URL works fine on the web with the ImageryTileLayer (JS). I asked how to implement it using iOS SDK in this post, and @MichaelBranscomb suggested using the AGSImageServiceRaster.

Is there any way to find out what's wrong? 

[Nicholas-Furness]

Hi @AndriyFedin 

There might be two problems.

1. Runtime only supports LERC tiles for elevation, and not visualization. You would need to publish a service that supports one of the formats listed here. Sorry we didn't spot that sooner when you replied in the original post!
   
2. Note that Runtime cannot reproject tiled images, so if you tried to display this service (WGS84) in a Web Mercator map, it would not display. That's something you can work around by suitably authoring/constructing the map. However, even if that's the case, the format can't be LERC.

Hope that helps!