Cached Image Service behaving dynamically in basemap gallery

BillDaigle

I am attempting to load a cached Image Service into a basemap gallery.  The image service does work, but it is behaving like a dynamic image service, not a cached one.  By that, I mean that it is running a export image request each time the map pans instead of fetching the pregenerated tiles.

Here is a link to the service: https://gisservicemt.gov/arcgis/rest/services/MSL/Reference100k_cached/ImageServer

Here is the link to a jsFiddle demonstrating a basemap gallery with one tiled map service and one tiled image service.

https://jsfiddle.net/bdaigle/22Lgp45f/

If you watch the network traffic, you will see that the two basemaps handle the request very differently -- the tiled map service fetches map tiles, whereas the tile image service runs an exportImage task.

The service does behave like a cached service if I explicitly define it as a ArcGISTiledMapServiceLayer and load it to the map manually (without the use of the Basemap Gallery), so I believe this is an issue with the BasemapGallery itself.

I have a couple of ideas for work arounds, but thought I would check with the community before going down that road.

Any ideas???

BillDaigle

Thanks for the link Robert.  I took a look at the AMD code for the BasemapGallery.  It looks like there is no hope for the service getting loaded to the basemap gallery as a tiled layer unless the service has a 'mapName' property.  Unfortunately, Image service don't have this property.  Instead, they have a 'name' property.

Here is a potential workaround that I have been "fiddling" with.  Essentially, it involves loading the Cached image service as a standard ArcGISTiledMapServiceLayer, then using the basemapGallery's selection-change event to add or remove it from the map.

https://jsfiddle.net/bdaigle/22Lgp45f/8/