topic Re: DEM base heights in 3D Questions https://community.esri.com/t5/3d-questions/dem-base-heights/m-p/282634#M1665 <HTML><HEAD></HEAD><BODY><SPAN>Kenny,</SPAN><BR /><BR /><SPAN>Your data is most likely in a geographic coordinate system with units of DD.&nbsp; ArcScene interprets the z unit the same as the x,y unit.&nbsp; You should project the data to a projected coordinate system that uses feet or meters.&nbsp; The spatial reference you choose should have units for x,y that are the same as your z unit.&nbsp; In other words, if the elevation data is in meters you should choose a projection that also uses meters.&nbsp; Its best to have x,y, and z be the same unit so you don't have to set any unit conversion factors.</SPAN><BR /><BR /><SPAN>If you want to quickly examine what the data will look like before projecting it, you can set the base heights in ArcScene like normal, then go to the View &gt; Scene Properties page and set a vertical exaggeration (calculate from extent).&nbsp; Set the number to something very small, like 0.0003.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Eric</SPAN></BODY></HTML> Fri, 05 Nov 2010 21:04:35 GMT EricRice 2010-11-05T21:04:35Z DEM base heights https://community.esri.com/t5/3d-questions/dem-base-heights/m-p/282633#M1664 <HTML><HEAD></HEAD><BODY><SPAN>I downloaded a DEM from the USGS seemless server. I added it to ArcScene. I want to show the&nbsp; elevation in the DEM. </SPAN><BR /><BR /><SPAN>Here's what I've done: Went to properties - base heights - clicked on "obtains heights for layer from surface". I'm selecting the DEM. </SPAN><BR /><BR /><SPAN>When I run this process the DEM disappears. What steps I'm I missing? Any suggestions?</SPAN><BR /><BR /><SPAN>I'm a student, please excuse the lack of knowledge. Thanks in advance.</SPAN></BODY></HTML> Sat, 23 Oct 2010 16:50:34 GMT https://community.esri.com/t5/3d-questions/dem-base-heights/m-p/282633#M1664 KennyMorris 2010-10-23T16:50:34Z Re: DEM base heights https://community.esri.com/t5/3d-questions/dem-base-heights/m-p/282634#M1665 <HTML><HEAD></HEAD><BODY><SPAN>Kenny,</SPAN><BR /><BR /><SPAN>Your data is most likely in a geographic coordinate system with units of DD.&nbsp; ArcScene interprets the z unit the same as the x,y unit.&nbsp; You should project the data to a projected coordinate system that uses feet or meters.&nbsp; The spatial reference you choose should have units for x,y that are the same as your z unit.&nbsp; In other words, if the elevation data is in meters you should choose a projection that also uses meters.&nbsp; Its best to have x,y, and z be the same unit so you don't have to set any unit conversion factors.</SPAN><BR /><BR /><SPAN>If you want to quickly examine what the data will look like before projecting it, you can set the base heights in ArcScene like normal, then go to the View &gt; Scene Properties page and set a vertical exaggeration (calculate from extent).&nbsp; Set the number to something very small, like 0.0003.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Eric</SPAN></BODY></HTML> Fri, 05 Nov 2010 21:04:35 GMT https://community.esri.com/t5/3d-questions/dem-base-heights/m-p/282634#M1665 EricRice 2010-11-05T21:04:35Z