I have a question concerning the Basemap Gallery Widget for WAB.
How can I get my own aerial basemaps (3) to show up along side Bing and the ESRI vector basemaps within the Basemap Gallery Widget?
I've gone through creating three separate web maps, one for each of my aerial years, saving them separately and sharing them to my new group. After obtain a Bing key, I did the same for Bing Aerial, Bing Hybrid and Bing Roads. I then went into Organization/Edit Settings/Map and changed the Basemap Gallery setting over to my new group and enabled "Share ESRI default basemaps to this group". The basemap gallery for creating a new web map has them all listed very nicely.
Unfortunately, this does not carry over to the Basemap Gallery Widget in WAB. First, my new basemap gallery group doesn't even show up as a selection and then if I choose ESRI default I get the following message "There are no basemaps available because all basemaps have different spatial reference or tiling scheme from the current map."
My three aerial basemaps are coming from a published image service and are not Web Mercator Auxiliary Sphere. Is this the issue?