Add colored box extruded up to specified elevation
msmitherdc opened this issue · 6 comments
Essentially this is adding a base elevation for displaying something like water surface (blue) or ground (brown) with a slider to adjust the height. Very useful in showing inundation scenarios (example http://rsgisias.crrel.usace.army.mil/pi/lst/sandbox/inundation-viewer/index5.html)
Cool :), we actually did have something similar, only that I was using it for point picking, I will re-enable it as Inundation.
Does the Inundation amount mean anything? I mean, is it in reference to anything, or is it just how far it is from the lowest point in the point cloud?
The inundation amount (depth) would be referenced to bare earth elevation, not necessarily the lowest point in the cloud.
Got it, so in most LAS/LAZ files can I assume that Z value of a point is its bare earth elevation? I would need to this establish some coordinate system for the elevation I think.
Not necessarily. Some point clouds are classified and have a specific ASPRS LAS code for bare earth but certainly not all. The coordinate system of the Z elevation should be part of the projection info (primarily meters or feet, occasionally survey feet).
Frankly, probably just having a slider that can adjust the value to +/- 100 units to the min/max Z should be good enough.
Sounds good, thanks for all the information, will implement.