I have a satellite base map that I have been working on in desktop. I have uploaded the digitized features as a hosted feature layer, but having trouble uploading a basemap to use in web map builder or a story map. T
If you are using ArcGIS Online (No ArcGIS Server), I would suggest you to create a tiled service of the imagery and upload to ArcGIS online using Publish a Tiled Service to ArcGIS Online w/o ArcGIS for Server or Utilizing Your Credits
Then use the following blog to add the above tiled layer to web map of ArcGIS online.
Using Custom Basemaps
After saving the webmap, you could create an application using WAB or a configurable app.
Retrieving data ...