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ArcGIS Server 10.3.1 MapServer/export  - single layer service = href & multilayer service = imageData (WHY???)

Question asked by BPATroy on Apr 1, 2016
Latest reply on May 20, 2016 by greenkarmic

ArcGIS Server 10.3.1 MapServer/export => Response for multilayer service returns base64 string in "imageData:blah blah blah". However, response for single layer service returns "href:path to virtual directory/filename.png".

 

What is going on here?

 

The documentation indicates that the property "useMapImage=true" which forces the exported image to be written to disk like ArcIMS was deprecated in version 2.0 of the JS API, but I am still seeing images materialize in the "arcgisoutput" directory on the server when calling a single layer MapServer/export.

 

Does anyone know why behavior is different between single layer and multilayer map service? 

 

Update - Sorry, I forgot to clarify that the GET/POST call is made to specifically return json using "f=json"...

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