topic Re: Creating/Calculating 3D Subsurface Geology Volumes in 3D Questions https://community.esri.com/t5/3d-questions/creating-calculating-3d-subsurface-geology-volumes/m-p/334217#M2042 <HTML><HEAD></HEAD><BODY><P>Do you have your ridge data as a tin?</P><P>You could create another tin by digitising a few points around the upper and lower sides, and with a bit of math, make it have a ~5deg slope.</P><P>Then use&nbsp;<A class="link-titled" href="http://desktop.arcgis.com/en/arcmap/latest/tools/3d-analyst-toolbox/surface-difference.htm" title="http://desktop.arcgis.com/en/arcmap/latest/tools/3d-analyst-toolbox/surface-difference.htm">Surface Difference—Help | ArcGIS Desktop</A>&nbsp;</P><P>to get the volume.</P></BODY></HTML> Fri, 21 Apr 2017 08:01:00 GMT NeilAyres 2017-04-21T08:01:00Z Creating/Calculating 3D Subsurface Geology Volumes https://community.esri.com/t5/3d-questions/creating-calculating-3d-subsurface-geology-volumes/m-p/334216#M2041 <HTML><HEAD></HEAD><BODY><P>Hey All,</P><P></P><P>I have a question in regards to calculating subsurface geology volumes. Im working on trying to create 3D model of some beach ridges. For those that don’t know.. a beach ridge is a wave-swept or wave-deposited ridge running parallel to a shoreline. These packages of sediment have subsurface geometries that wedge-out at a ~5° dip lake-ward (please see photo links below).</P><P></P><P>I know how to calculate the surface volumes of the ridges, but am having trouble figuring out a way to create and calculate the volume of the wedges that pinch out below the surface. I don’t have any info on the extent or depth of the wedges (no borehole data), just trying to model the data off that ~5° dip lake-ward.</P><P></P><P>Is this a possibility in ArcMap/ArcScene or do I need the assistance of third party software like (<A href="http://www.aquaveo.com/software/ahgw-subsurface-analyst">http://www.aquaveo.com/software/ahgw-subsurface-analyst</A>) or (<A href="http://www.leapfrog3d.com">http://www.leapfrog3d.com</A>). I attempted to import a DEM into Sketchup but was having issues converting my DEM in ArcMap to the .dem / .ddf files that Sketchup allows. I also just tried to model things in Sketchup w/o the DEM and still had tremendous difficulty with the complex shapes involved.</P><P></P><P>Any feedback/insight would be greatly appreciated! Thanks</P><P></P><P>Orthophoto of study area: <A href="http://imgur.com/a/sHUha">http://imgur.com/a/sHUha</A><BR />ArcScene 3D photo w/ vertical exaggeration: <A href="http://imgur.com/a/kisGA">http://imgur.com/a/kisGA</A><BR />ArcMap polygon outlines: <A href="http://imgur.com/a/jARa6">http://imgur.com/a/jARa6</A><BR />Rough cross-section sketch of beach ridges: <A href="http://imgur.com/a/d7NcI">http://imgur.com/a/d7NcI</A></P></BODY></HTML> Fri, 21 Apr 2017 00:45:47 GMT https://community.esri.com/t5/3d-questions/creating-calculating-3d-subsurface-geology-volumes/m-p/334216#M2041 JamesAmato1 2017-04-21T00:45:47Z Re: Creating/Calculating 3D Subsurface Geology Volumes https://community.esri.com/t5/3d-questions/creating-calculating-3d-subsurface-geology-volumes/m-p/334217#M2042 <HTML><HEAD></HEAD><BODY><P>Do you have your ridge data as a tin?</P><P>You could create another tin by digitising a few points around the upper and lower sides, and with a bit of math, make it have a ~5deg slope.</P><P>Then use&nbsp;<A class="link-titled" href="http://desktop.arcgis.com/en/arcmap/latest/tools/3d-analyst-toolbox/surface-difference.htm" title="http://desktop.arcgis.com/en/arcmap/latest/tools/3d-analyst-toolbox/surface-difference.htm">Surface Difference—Help | ArcGIS Desktop</A>&nbsp;</P><P>to get the volume.</P></BODY></HTML> Fri, 21 Apr 2017 08:01:00 GMT https://community.esri.com/t5/3d-questions/creating-calculating-3d-subsurface-geology-volumes/m-p/334217#M2042 NeilAyres 2017-04-21T08:01:00Z