What units does the LAS Dataset 3D Viewer use?

[TheodoreRakel]

I'm using arc map 10.2.1 and using the LAS Dataset 3D View tool to measure the distance between LiDAR points.  The measure tool always indicates "Unknown unit".

I've tried setting a projection on the LAS Dataset, but I still get "Unknown unit".

How do I get the 3D View to indicate to the user that the measure tool is measuring in US Feet?

[ClaytonCrawford · Accepted solution]

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.

We may consider assuming z units are the same as xy if z is undefined but for now we make no assumptions.