Different EPSG values

Discussion created by sarajase on Apr 23, 2014
Latest reply on Apr 23, 2014 by sarajase
Hello All,

I got a geo-TIFF with

Projection: UTM
Datum:      WGS84
Zone:       18
The EPSG Code is 32617

I Re-projected the same image to NAD83

Projection: UTM
Datum:      NAD83
Zone:       18
The EPSG Code is 26918 (correct)

Does any one know why this discrepancy occurs?
I heard that ESRI not current with EPSG processing or something like that.