Everyone, I think it will be great to see the Add Data widget (or similar ones) finally enhanced to allow user upload of raster data (maybe up to a certain size limit of course). Currently, this widget only allows upload of shapefile, csv, txt, and GPX. However, many of our users have been asking about the possibility to add their own raster data as well to the web application. Especially with Google Earth Engine becoming more and more popular allowing users to upload their own raster data, I think it is time for ESRI to enhance this aspect and add support for raster data added at runtime. Please vote up if you like this idea!