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Why is the World Imagery basemap loading so slow?

Question asked by ibroad on Jul 5, 2017
Latest reply on Jul 5, 2017 by LDanzinger-esristaff

I don't initially load the World Imagery basemap inside the Map object because I want it off by default. Also, the map is in our local state plane coordinate system.


So, I have something like:

SpatialReference {
     id: sr
     wkid: 102726

Map {
     id: map
     spatialReference: sr

ArcGISMapImageLayer {
     id: basemapLayer
     url: ""

     visible: false
     opacity: 0.60


And then I have a button that when clicked turns the basemapLayer on/off.


I'm surprised how slow the imagery loads, even over a wifi connection. Is this due to the spatial reference of the map, and the imagery needing to reproject on the fly?


I've noticed when I zoom in pretty close to say a building, the imagery just never even loads.