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Turning a .ecw file into a basemap in ArcOnline?

Question asked by ThomasDPW1 on Mar 22, 2019

I am a Water and Sewer Utility Director, and have created a water and sewer map in ArcMap 10.3.1.  I recently upgraded to ArcPro so I could upload my map to ArcOnline.  The problem I am finding out is that the basemap I used to create my initial map is an .ecw file, provided by my local GIS authority.  What do I need to do with that file in order to make it a basemap on ArcOnline, to be viewed in the Explorer for ArcGIS application on a tablet. 




Trevor Schultz 

Thomas Township Department of Public Works

Saginaw, MI