bgfield

How are the thumbnails automatically generated (and why do some maps not have them?)

Discussion created by bgfield on May 14, 2013
Latest reply on Jun 10, 2015 by pml
I have a number of maps created and saved on my ArcGIS Online account.  When I save the map - in most cases - the thumbnail is automatically generated based on the extent of the features; it shows the basemap and the layers added to the map.

For some of my maps, though, there is no thumbnail at all.  I also tried changing the basemap on one service, but I didn't see the change reflected in the thumbnail.  The only idea I've come up with so far is that all of the offending maps are using large layers (>2mb in size); but, not all of the maps with large layers are experiencing this problem, so I'm not sure if that's related.

I know I can add a thumbnail image myself, but taking a screen grab of the map and shrinking it to fit the thumbnail requirements is a cumbersome process that I'd like to avoid if possible.

Outcomes