The end goal is to build a web application where people can explore the historical maps I've georeferenced - among other things. ArcGIS online is the ideal venue for everything else I want, but for whatever reason it seems I can't easily upload raster files as in ArcMap. And I have approx. 12 rasters I want to upload (about the size of Bermuda).
There seems to be some confusing work arounds, but my concern is that a lot of credits will be used. Also, even more importantly, it seems I have to publish my rasters as layer files to ArcGIS online as a work around, but I feel this makes my work public to use by other users. I want only those in my organization to be able to access and use my georeferenced work in their maps. The work I've performed isn't mine to share, it belongs to my educational institution.
What's the best route for me to go? Is there a way to publish these layers to ArcGIS Online in a way that makes the layers accessible only to my organization?