topic Problem for Operational Layer loaded before Basemap Layer in ArcGIS JavaScript Maps SDK Questions

Problem for Operational Layer loaded before Basemap Layer

ShaningYu — Thu, 30 Jan 2014 10:21:37 GMT

This is a continuation of my thread at http://forums.arcgis.com/threads/101693-Zoom-level?p=362198&posted=1#post362198. In that thread, I reported the Zoom level in JS application. Using Jeff's approach, I added the operation layer, which is defined with deeper scale in ArcGIS Server, before I added another other layers. The problem remained is that once a basemap is loaded, that operational layer becomes invisible.
However, in my SL application, it is not a problem.
Is there any way to solve it? Thanks.

Re: Problem for Operational Layer loaded before Basemap Layer - Solved

ShaningYu — Thu, 30 Jan 2014 11:37:53 GMT

Using the procedure below, the problem is solved:
1) Change esri.layers.ArcGISTiledMapServiceLayer to esri.layers.ArcGISDynamicMapServiceLayer for the basemap.
2) Set the basemap opacity: 0.5.
3) Load the operation layer that can scale deeper as the 1st layer.

Re: Problem for Operational Layer loaded before Basemap Layer

JeffPace — Thu, 30 Jan 2014 11:41:56 GMT

This is correct, and will allow you to scale deeper than lowest level (19) by rendering everything dynamically.

However, performance is SEVERELY impacting rendering a basemap dynamically.

I would recommend against it.

Re: Problem for Operational Layer loaded before Basemap Layer

ShaningYu — Thu, 30 Jan 2014 12:35:49 GMT

Jeff: Actually, it can zoom deeper than L19, and can go as deeper as that in ArcMap. I added an opcity slider for the basemap: US Streets. It looks fine. But I can't use ESRI basemap gallery, as pointed out already. Thanks anyway.