topic How do you remove the forest canopy from a Phodar DEM to get bare earth? in Forestry Questions https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93355#M114 <HTML><HEAD></HEAD><BODY><P>I'm trying to create a bare earth DEM from Phodar data to create a detailed contour layer. Is there a way to smooth or remove the high points of the canopy?</P></BODY></HTML> Wed, 14 Jun 2017 21:20:44 GMT Anonymous User 2017-06-14T21:20:44Z How do you remove the forest canopy from a Phodar DEM to get bare earth? https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93355#M114 <HTML><HEAD></HEAD><BODY><P>I'm trying to create a bare earth DEM from Phodar data to create a detailed contour layer. Is there a way to smooth or remove the high points of the canopy?</P></BODY></HTML> Wed, 14 Jun 2017 21:20:44 GMT https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93355#M114 Anonymous User 2017-06-14T21:20:44Z Re: How do you remove the forest canopy from a Phodar DEM to get bare earth? https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93356#M115 <HTML><HEAD></HEAD><BODY><P>Are the points classified at all?</P></BODY></HTML> Thu, 15 Jun 2017 14:14:13 GMT https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93356#M115 IanMurray 2017-06-15T14:14:13Z Re: How do you remove the forest canopy from a Phodar DEM to get bare earth? https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93357#M116 <HTML><HEAD></HEAD><BODY><P>I saw a nice presentation on&nbsp;Improved Vegetation Management with <STRONG>PhoDAR</STRONG> by Dave Twichell, <A href="https://community.esri.com/people/BBaldwin-esristaff">BBaldwin-esristaff</A>&nbsp;&nbsp;and David Shear which you can find here:&nbsp;<A class="link-titled" href="http://www.esri.com/events/transmission-summit/~/media/A36CC282BBCA42ABB06F527A648DF5E6" title="http://www.esri.com/events/transmission-summit/~/media/A36CC282BBCA42ABB06F527A648DF5E6">http://www.esri.com/events/transmission-summit/~/media/A36CC282BBCA42ABB06F527A648DF5E6</A>&nbsp;</P><P></P><P>In this presentation there is a comparison between PhoDAR and LiDAR:</P><P><IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/357136_pastedImage_1.png" style="width: 620px; height: 155px;" /></P><P></P><P>Since PhoDAR does not penetrate canopy you will not have any&nbsp;information on the bare earth elevation for areas with dense vegetation. Although in the same presentation the vegetation was classified and one could extract those areas that have no vegetation from your DSM, but you will have to fill up those wholes that are left. In case of large vegetation areas, it will be very difficult to derive a good DEM/DTM from your PhoDAR data.</P></BODY></HTML> Thu, 15 Jun 2017 15:22:37 GMT https://community.esri.com/t5/forestry-questions/how-do-you-remove-the-forest-canopy-from-a-phodar/m-p/93357#M116 XanderBakker 2017-06-15T15:22:37Z