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This workflow is incorrect. Any smoothing of the DEM must be done before the Fill operation, and Flow Direction should be run directly after Fill.
I have attached an updated workflow.
I new use an aggregate immediately after the filter. Should I use the focal mean instead?
I did fix the problem with the parsed lines. Strangely enough, when I do the steams to features in the workflow, I get the parsed lines. However, when I run the function separately in the toolbox, it delivers correct results. Why is that?
The algorithm still seems to be missing some streams when I compare it to my hillshades. Any ideas why?
I have attached am image where my streams are blue and the previously issues streams are in red. The red streams are correct in this case as this is a river. Some of my blue streams do not connect as well. Why does this occur?
Finally, I am creating the streams from my LIDAR DEM GRID which was originally in State Plane PA North 1983 in feet. I reprojected them to UTM Zone 17 1983 in meters. As far as the elevation values, I converted those from feet to meters manually and they are correct. Could the reprojection of the cells be causing problems with ArcGIS recognizing stream features? I noticed a blocky look when zoomed into the UTM projected GRID. Just a thought.
Thanks for your previous help!
Another option would be the tools from the Center for Research in Water Resources. I have used their Optimized Pit Removal to quickly process bad data to then get streams for large areas. This tool is good for getting streams in areas where you have lidar.
Link: tools.crwr
Contains ArcGIS (version 10.1) geoprocessing script tools for removing pits (or sinks) from Digital Elevation Models using a combination of cut and fill. This alternative to the standard Fill tool provides more realistic flow paths with less required manual adjustment. Ideal for high-resolution datasets such as LiDAR.
Has anyone used this tool with ArcGIS 10.2?
This workflow is incorrect. Any smoothing of the DEM must be done before the Fill operation, and Flow Direction should be run directly after Fill.