No tutorial, but I would create a b/w mask and, in Wilbur, do Selection -> Load Selection. Then perform erosion steps as normal. I actually have started using Genbrush (
https://mavichist.itch.io/genbrush) for targeted erosion and that works pretty well. Be aware, though, that I have to manually convert the raw data to tif to get my results out, since the current application only supports exporting 8-bit.
I've tried using the Arcgis Pro workflow for deriving rivers and lakes, but it ends up being difficult because of the necessity to perform a fill step. If there are too many basins that need to be filled you end up with a lot of straight rivers that pass through the filled basins which looks bad. Currently, I use World Machine to derive rivers and lakes, which for whatever reason their "find water" algorithms are more forgiving and gives better results. I take the raster output rivers from World Machine, then use the Raster -> Polyline in Arcgis Pro (Raster -> Polygon for lakes). Then I work on cleaning up errors and combining polylines to form "full" rivers. I export that into a vector program like Affinity, and create the tapered effect using variable stroke, adjusting all the rivers manually. I expand the stroke out and import back into ArcGIS Pro as polygons. It's a frustratingly manual process but it's better than hand-drawing rivers. The only thing this method lacks is any way to get river deltas.
Originally Posted by morne
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