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Does the .prj file require the AUTHORITY tag for a CRS not recognised by ESRI or EPSG?

Question asked by pauldowd on Nov 3, 2015
Latest reply on Nov 3, 2015 by pauldowd

I am writing shapefile sets for CRSs that are not always in the EPSG database. It seems that ArcGIS does not accept the AUTHORITY tag unless it references a valid code e.g. AUTHORITY["EPSG", "2000"]. Does the PE require this tag or can it be omitted under these circumstances? If not then which strings should it contain?

Thank you

Paul

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