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Riverscapes / riverscapes-tools

Open-source Python 3.0 tools for the Riverscapes organization
https://tools.riverscapes.net/
GNU General Public License v3.0
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LiDAR channel delineation using TauDEM #447

Open KellyMWhitehead opened 3 years ago

KellyMWhitehead commented 3 years ago

One of the inputs for generating the HAND raster using taudem is the delineated channel network/area that is used as the detrending elevation. For standard 10m dems, the NHD flowline and flow areas work fine. For higher resolution dems (i.e. lidar) this line network is too coarse to be useful in generating HAND (see #299 ). Other options include hand digitizing the line network (or channel area polygons) for the area of interest, however 1) this is time consuming and 2) the results, though more accurate than NHD, might still not be accurate enough to utilize the full benefits of the high-resolution topography.

Taudem has tools that could potentially be used to delineate a stream network useful for generating HAND in LiDAR.

KellyMWhitehead commented 3 years ago

Here are the initial results for Ferry Canyon: lidarsrc.zip image image image

@joewheaton might be interested taking a look at this...

KellyMWhitehead commented 3 years ago

@philipbaileynar @joewheaton @nick4rivers

Went a step further and ran it through taudem to see what would happen: project link

looking good so far...

nick4rivers commented 3 years ago

@KellyMWhitehead - rasterized channel is looking good? Went through the TauDEM project, but doesn't seem like you did run the LiDAR DEM? I could be missing something, but if not what do we need to get the detrended LiDAR DEM?

Thanks @KellyMWhitehead

joewheaton commented 2 years ago

@KellyMWhitehead what is the status of this?

philipbaileynar commented 9 months ago

@nick4rivers is this still relevant? Is the project still active?