topic Re: What units does the LAS Dataset 3D Viewer use? in LIDAR Resources Questions https://community.esri.com/t5/lidar-resources-questions/what-units-does-the-las-dataset-3d-viewer-use/m-p/750369#M4 <HTML><HEAD></HEAD><BODY><P>The distance and delta z are 3D and require z units to be defined in addition to XY. If z units differ from XY they will be converted to XY for the sake of reporting units.</P><P></P><P>We may consider assuming z units are the same as xy if z is undefined but for now we make no assumptions.</P></BODY></HTML> Thu, 15 Oct 2015 16:46:32 GMT ClaytonCrawford 2015-10-15T16:46:32Z What units does the LAS Dataset 3D Viewer use? https://community.esri.com/t5/lidar-resources-questions/what-units-does-the-las-dataset-3d-viewer-use/m-p/750368#M3 <HTML><HEAD></HEAD><BODY><P>I'm using arc map 10.2.1 and using the LAS Dataset 3D View tool to measure the distance between LiDAR points.&nbsp; The measure tool always indicates "Unknown unit". </P><P><IMG alt="las_dataset_3d_view_units.jpg" class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/131205_las_dataset_3d_view_units.jpg" style="height: auto;" /></P><P>I've tried setting a projection on the LAS Dataset, but I still get "Unknown unit". </P><P><IMG alt="las_dataset_projection.jpg" class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/131208_las_dataset_projection.jpg" /></P><P>How do I get the 3D View to indicate to the user that the measure tool is measuring in US Feet?</P></BODY></HTML> Wed, 14 Oct 2015 16:55:37 GMT https://community.esri.com/t5/lidar-resources-questions/what-units-does-the-las-dataset-3d-viewer-use/m-p/750368#M3 TheodoreRakel 2015-10-14T16:55:37Z Re: What units does the LAS Dataset 3D Viewer use? https://community.esri.com/t5/lidar-resources-questions/what-units-does-the-las-dataset-3d-viewer-use/m-p/750369#M4 <HTML><HEAD></HEAD><BODY><P>The distance and delta z are 3D and require z units to be defined in addition to XY. If z units differ from XY they will be converted to XY for the sake of reporting units.</P><P></P><P>We may consider assuming z units are the same as xy if z is undefined but for now we make no assumptions.</P></BODY></HTML> Thu, 15 Oct 2015 16:46:32 GMT https://community.esri.com/t5/lidar-resources-questions/what-units-does-the-las-dataset-3d-viewer-use/m-p/750369#M4 ClaytonCrawford 2015-10-15T16:46:32Z