topic Map projection difference in Data Management Questions https://community.esri.com/t5/data-management-questions/map-projection-difference/m-p/300816#M17229 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I have two adjacent DEMs with different projections (see attached)</SPAN><BR /><SPAN>I suspect the difference will be minimal but has anyone have an idea to the scale of the difference?</SPAN><BR /><SPAN>i.e. Should I be concerned?</SPAN></BODY></HTML> Wed, 25 Jun 2014 23:41:02 GMT BobMCkay 2014-06-25T23:41:02Z Map projection difference https://community.esri.com/t5/data-management-questions/map-projection-difference/m-p/300816#M17229 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I have two adjacent DEMs with different projections (see attached)</SPAN><BR /><SPAN>I suspect the difference will be minimal but has anyone have an idea to the scale of the difference?</SPAN><BR /><SPAN>i.e. Should I be concerned?</SPAN></BODY></HTML> Wed, 25 Jun 2014 23:41:02 GMT https://community.esri.com/t5/data-management-questions/map-projection-difference/m-p/300816#M17229 BobMCkay 2014-06-25T23:41:02Z Re: Map projection difference https://community.esri.com/t5/data-management-questions/map-projection-difference/m-p/300817#M17230 <HTML><HEAD></HEAD><BODY><SPAN>They're the same. My guess is that the GDA_1994_Transverse_Mercator DEM is a GRID or originally came from a GRID/TIN. That file format used the ArcInfo Workstation coordinate system format. It doesn't support as much as the ArcGIS format does.</SPAN><BR /><BR /><SPAN>Melita</SPAN></BODY></HTML> Thu, 26 Jun 2014 15:14:37 GMT https://community.esri.com/t5/data-management-questions/map-projection-difference/m-p/300817#M17230 MelitaKennedy 2014-06-26T15:14:37Z