topic Vertical resolution of a DEM in Data Management Questions https://community.esri.com/t5/data-management-questions/vertical-resolution-of-a-dem/m-p/463734#M26524 <HTML><HEAD></HEAD><BODY><SPAN>I have a DEM, and I know that in Layer Properties &gt; Source it gives the cell resolution (in my case, 5m x 5m), but I also need to know the vertical resolution (sometimes called the vertical accuracy). Any idea how I find this?</SPAN></BODY></HTML> Thu, 13 Jun 2013 10:10:12 GMT SteveL 2013-06-13T10:10:12Z Vertical resolution of a DEM https://community.esri.com/t5/data-management-questions/vertical-resolution-of-a-dem/m-p/463734#M26524 <HTML><HEAD></HEAD><BODY><SPAN>I have a DEM, and I know that in Layer Properties &gt; Source it gives the cell resolution (in my case, 5m x 5m), but I also need to know the vertical resolution (sometimes called the vertical accuracy). Any idea how I find this?</SPAN></BODY></HTML> Thu, 13 Jun 2013 10:10:12 GMT https://community.esri.com/t5/data-management-questions/vertical-resolution-of-a-dem/m-p/463734#M26524 SteveL 2013-06-13T10:10:12Z Re: Vertical resolution of a DEM https://community.esri.com/t5/data-management-questions/vertical-resolution-of-a-dem/m-p/463735#M26525 <HTML><HEAD></HEAD><BODY><SPAN>The metadata should provide this information. I do not know the source of your data, but the USGS states:</SPAN><BR /><BR /><SPAN>Q: What is the vertical accuracy of NED data?</SPAN><BR /><BR /><SPAN>A: The accuracy of the National Elevation Dataset (NED) varies spatially because of the variable quality of the source digital elevation models (DEMs). As such, the NED inherits the accuracy of the source DEMs. The most recently published figure of overall absolute vertical accuracy expressed as the root mean square error (RMSE) is 2.44 meters. Details of this analysis are explained in the Vertical Accuracy of the National Elevation Dataset paper, and are published in the Digital Elevation Model Technologies and Applications: The DEM Users Manual 2nd Edition.</SPAN></BODY></HTML> Thu, 13 Jun 2013 12:09:11 GMT https://community.esri.com/t5/data-management-questions/vertical-resolution-of-a-dem/m-p/463735#M26525 JimCousins 2013-06-13T12:09:11Z