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Why does the name of the ESRI coordinate system on my source features change within the FME workspace?
Basically,this is due to FME "cloning" the coordinate system to track the original ESRI WKT coordinate system.This was an intentional change to better preserve ESRI WKT from reader to writer.
For example,the_LL-WGS84_0system is exactly likeLL-WGS84but when converted back to ESRI WKT it will use the original WKT,which is different (even by one character) than what FME would normally write for LL-WGS84.More generally: If FME is asked to convert an ESRI WKT coordinate system into an FME one,and a subsequent conversion from this FME coordinate system back to ESRI WKT would not yield the identical string,we output a
_
system instead,and have it track this difference.
Background: =========== When we write a coordinate system to ESRI WKT we have to pick the WKT to represent that system.We do this through a combination of exceptions and algorithmic generation.There are a group of customers that would like to do ESRI -> ESRI translations and preserve (byte for byte) the WKT from the source,even if our choice would have been reasonable (which it isn't always).So we started attaching the source WKT to the FME coordinate system that we believed it matched,and always output that.However,some customers didn't like the source ESRI WKT,but we had no easy way of getting at the WKT that FME would have otherwise chosen.Now we create a clone of the coordinate system that the source WKT matches and attach the source WKT to that.If the customer wants the FME WKT they can switch to the non-clone coordinate system instead.
Coordinate Systems and Measurements with the Reprojector
How does FME interact with ESRI coordinate systems?
Resolving an unrecognized Esri Coordinate System Exception
Creating an FME ETL Tool in a New Toolbox in ArcGIS causes an error
Working with Geodatabase Metadata: Writing/Updating Metadata
Viewing and Inspecting Geodatabases
Converting to Geodatabase Format
Point in Polygon Calculations with the PointOnAreaOverlayer
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