Roughness Height Raster
The Derive Associated and Error Surfaces tool generates surfaces used for analyzing Geomorphic Change Detection.
- Make sure you have the Channel Unit CSV file generated by the CHaMP Broker.
- Under the
Topo Processingmenu, select the
Derive Associated and Error Surfacestool.
- Make sure the correct Survey Geodatabase is open.
Make sure that the correct
Channel Unit CSVfiles are specified.
This tool may take several minutes to run, especially for very large surveys.
Click OK to Run the tool
There are no outputs that need to be reviewed. When you have generated the Associated and Error Surfaces, you may proceed to Generate a Thalweg.
Issue with Small Side Channels
In a small side channel, since occular estimates of substrate are not collected (per protocol), missing data in the csv is causing the tool to fail.
- Make a copy of the
ChannelUnits.csvfile in your topo folder
- Remove any lines that refer to the small side channels or are missing Occular Estimate Value.
- Save the file and then use this copy when running the tool.