topic Re: Vertical Reference in Drone 2 Map in ArcGIS Drone2Map Questions https://community.esri.com/t5/arcgis-drone2map-questions/vertical-reference-in-drone-2-map/m-p/67472#M189 <HTML><HEAD></HEAD><BODY><P>Ryan</P><P></P><P>You're correct that the world elevation is orthometric (geoid based), not elllipsoidal.&nbsp; If you used control referenced to WGS 84 (ellipsoidal height), that will align your 3D products with the vertical height of the ellipsoid.&nbsp; See help here <A class="link-titled" href="https://doc.arcgis.com/en/drone2map/help/control.htm" title="https://doc.arcgis.com/en/drone2map/help/control.htm">Manage control—Drone2Map for ArcGIS Help | Documentation</A>&nbsp;and also&nbsp;<A class="link-titled" href="https://doc.arcgis.com/en/drone2map/help/vertical-reference.htm" title="https://doc.arcgis.com/en/drone2map/help/vertical-reference.htm">Vertical reference—Drone2Map for ArcGIS Help | Documentation</A>&nbsp;</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<EM>I updated this post - had previously send a link to doc on an older version</EM></P><P></P><P>Yes you can change this - there are many approaches depending on your end goals.</P><P>1)&nbsp;if you're publishing 3D products in ArcGIS Online or Enterprise and then viewing 3D web scenes, you can apply a vertical offset in the web viewer.&nbsp; (You'd have to determine the right value to use - apparently something near 120 feet).</P><P>2) if you are using the 3D Products in ArcGIS Pro, you can set the ground height to reference ellipsoidal height</P><P>3) if you want your 3D products to be referenced to orthometric height (to automatically align with the ArcGIS world terrain), you'd need to re-run the 3D processing - we don't currently have a method to edit the Z values in 3D point clouds and meshes.&nbsp; To do this, you'd need to adjust the Z values in your GCPs to reference orthometric height before processing.&nbsp;&nbsp;</P><P></P><P>If that doesn't help, let us know where (what software) you're using the 3D products&nbsp;</P><P>Cody</P><P></P><P>It sounds like you already understand orthometric vs. ellipsoidal heights, but this reference may be helpful&nbsp;</P><P><A class="link-titled" href="https://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/wkflw-converting-from-orthometric-to-ellipsoidal-heights.htm" title="https://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/wkflw-converting-from-orthometric-to-ellipsoidal-heights.htm">Converting from orthometric to ellipsoidal heights—Help | Documentation</A>&nbsp;</P></BODY></HTML> Tue, 12 May 2020 16:32:24 GMT CodyBenkelman 2020-05-12T16:32:24Z Vertical Reference in Drone 2 Map https://community.esri.com/t5/arcgis-drone2map-questions/vertical-reference-in-drone-2-map/m-p/67471#M188 <HTML><HEAD></HEAD><BODY><P>I am currently using Drone 2 Map to produce 3D Maps using a DJI Drone that records in WGS84, my GCP's are collected in WGS84 as well.&nbsp; When I process the mission and apply it with the World Elevation background the elevations are almost 120 ft difference.&nbsp; It appears that the World Elevation is applying the local geoid elevation and not WGS84.&nbsp; Is there any way to correct this?</P><P></P><P><IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/491863_pastedImage_1.png" /></P></BODY></HTML> Tue, 12 May 2020 13:29:48 GMT https://community.esri.com/t5/arcgis-drone2map-questions/vertical-reference-in-drone-2-map/m-p/67471#M188 RyanRoot 2020-05-12T13:29:48Z Re: Vertical Reference in Drone 2 Map https://community.esri.com/t5/arcgis-drone2map-questions/vertical-reference-in-drone-2-map/m-p/67472#M189 <HTML><HEAD></HEAD><BODY><P>Ryan</P><P></P><P>You're correct that the world elevation is orthometric (geoid based), not elllipsoidal.&nbsp; If you used control referenced to WGS 84 (ellipsoidal height), that will align your 3D products with the vertical height of the ellipsoid.&nbsp; See help here <A class="link-titled" href="https://doc.arcgis.com/en/drone2map/help/control.htm" title="https://doc.arcgis.com/en/drone2map/help/control.htm">Manage control—Drone2Map for ArcGIS Help | Documentation</A>&nbsp;and also&nbsp;<A class="link-titled" href="https://doc.arcgis.com/en/drone2map/help/vertical-reference.htm" title="https://doc.arcgis.com/en/drone2map/help/vertical-reference.htm">Vertical reference—Drone2Map for ArcGIS Help | Documentation</A>&nbsp;</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<EM>I updated this post - had previously send a link to doc on an older version</EM></P><P></P><P>Yes you can change this - there are many approaches depending on your end goals.</P><P>1)&nbsp;if you're publishing 3D products in ArcGIS Online or Enterprise and then viewing 3D web scenes, you can apply a vertical offset in the web viewer.&nbsp; (You'd have to determine the right value to use - apparently something near 120 feet).</P><P>2) if you are using the 3D Products in ArcGIS Pro, you can set the ground height to reference ellipsoidal height</P><P>3) if you want your 3D products to be referenced to orthometric height (to automatically align with the ArcGIS world terrain), you'd need to re-run the 3D processing - we don't currently have a method to edit the Z values in 3D point clouds and meshes.&nbsp; To do this, you'd need to adjust the Z values in your GCPs to reference orthometric height before processing.&nbsp;&nbsp;</P><P></P><P>If that doesn't help, let us know where (what software) you're using the 3D products&nbsp;</P><P>Cody</P><P></P><P>It sounds like you already understand orthometric vs. ellipsoidal heights, but this reference may be helpful&nbsp;</P><P><A class="link-titled" href="https://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/wkflw-converting-from-orthometric-to-ellipsoidal-heights.htm" title="https://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/wkflw-converting-from-orthometric-to-ellipsoidal-heights.htm">Converting from orthometric to ellipsoidal heights—Help | Documentation</A>&nbsp;</P></BODY></HTML> Tue, 12 May 2020 16:32:24 GMT https://community.esri.com/t5/arcgis-drone2map-questions/vertical-reference-in-drone-2-map/m-p/67472#M189 CodyBenkelman 2020-05-12T16:32:24Z