topic z coordinate off significantly in ArcPad Questions https://community.esri.com/t5/arcpad-questions/z-coordinate-off-significantly/m-p/488479#M3553 <HTML><HEAD></HEAD><BODY><SPAN>I installed get xyz extension on my handheld GPS unit. When I take points out in the field and load them into ArcMap it will bring up the x,y, and z information in the attributes but the z information is off anywhere from 50-80ft in elevation. Is there a reason for this? Can this be fixed? If so, how?</SPAN></BODY></HTML> Tue, 12 Nov 2013 11:09:38 GMT GISADMIN5 2013-11-12T11:09:38Z z coordinate off significantly https://community.esri.com/t5/arcpad-questions/z-coordinate-off-significantly/m-p/488479#M3553 <HTML><HEAD></HEAD><BODY><SPAN>I installed get xyz extension on my handheld GPS unit. When I take points out in the field and load them into ArcMap it will bring up the x,y, and z information in the attributes but the z information is off anywhere from 50-80ft in elevation. Is there a reason for this? Can this be fixed? If so, how?</SPAN></BODY></HTML> Tue, 12 Nov 2013 11:09:38 GMT https://community.esri.com/t5/arcpad-questions/z-coordinate-off-significantly/m-p/488479#M3553 GISADMIN5 2013-11-12T11:09:38Z Re: z coordinate off significantly https://community.esri.com/t5/arcpad-questions/z-coordinate-off-significantly/m-p/488480#M3554 <HTML><HEAD></HEAD><BODY><SPAN>Your GNSS unit is likely storing the ellipsoid height, not the orthometric height, which would give the difference in heights you describe. </SPAN><BR /><BR /><SPAN>ArcPad does not utilize a geoid model, just the ability to enter a constant geoid separation value in the GPS Preferences. What GNSS hardware are you utilizing. If a survey unit exporting NMEA data you could possibly enter the geoid model for orthometric values.</SPAN></BODY></HTML> Tue, 12 Nov 2013 21:20:38 GMT https://community.esri.com/t5/arcpad-questions/z-coordinate-off-significantly/m-p/488480#M3554 BrettBlack 2013-11-12T21:20:38Z