topic Re: SArea does not match F_Area? in 3D Questions https://community.esri.com/t5/3d-questions/sarea-does-not-match-f-area/m-p/406158#M2401 <HTML><HEAD></HEAD><BODY><SPAN>Is it because 3D analyst is measuring the 3D surface area (i.e. taking into account undulations/slope etc) whereas the spatial statistics tool is just measuring 2D/planar area?</SPAN><BR /><BR /><SPAN>Alternatively, if you have been editing shapefile polygons in between calculating the values, then the area calculations will need to be re-run to incorporate the edits.</SPAN></BODY></HTML> Sun, 28 Jul 2013 19:24:39 GMT TimBarnes 2013-07-28T19:24:39Z SArea does not match F_Area? https://community.esri.com/t5/3d-questions/sarea-does-not-match-f-area/m-p/406157#M2400 <HTML><HEAD></HEAD><BODY><SPAN>Greetings, </SPAN><BR /><BR /><SPAN>I am using 3D analyst to calculate the volume of a reservoir using the Polygon Volume tool. </SPAN><BR /><BR /><SPAN>As part of the process the polygon volume tool calculates a surface area for the polygon. I am confused as to why the surface area calculated by 3D Analyst is different from the surface area calculated by the spatial statistics tool. I would like to have a fairly high degree of confidence in the volume calculation and the different surface volume calculations have got me wondering...</SPAN><BR /><BR /><SPAN>See attached.</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><BR /><SPAN>b</SPAN></BODY></HTML> Mon, 22 Jul 2013 13:34:04 GMT https://community.esri.com/t5/3d-questions/sarea-does-not-match-f-area/m-p/406157#M2400 BobChristensen 2013-07-22T13:34:04Z Re: SArea does not match F_Area? https://community.esri.com/t5/3d-questions/sarea-does-not-match-f-area/m-p/406158#M2401 <HTML><HEAD></HEAD><BODY><SPAN>Is it because 3D analyst is measuring the 3D surface area (i.e. taking into account undulations/slope etc) whereas the spatial statistics tool is just measuring 2D/planar area?</SPAN><BR /><BR /><SPAN>Alternatively, if you have been editing shapefile polygons in between calculating the values, then the area calculations will need to be re-run to incorporate the edits.</SPAN></BODY></HTML> Sun, 28 Jul 2013 19:24:39 GMT https://community.esri.com/t5/3d-questions/sarea-does-not-match-f-area/m-p/406158#M2401 TimBarnes 2013-07-28T19:24:39Z