I am trying to find a tool that is similar to "Adaptive Smoothing" (found on ArcGIS) on QGIS. What I am trying to do is eliminate narrow drainages (narrow corridors less than 6 m wide). This is part of my predictive wetland model.
I have tried getting the negative buffer of the polygons (i.e. 6 m) and then I got the positive buffer (6 m). I found that this eliminated the narrow drainages but when I created the polygons, the buffered result didn't maintain the shape of the original polygon.
Is there a way to maintain the shape of a buffered polygon?
This is the before result (note narrow fingers):
Here is the result of de-buffering and buffering. This is almost what I want but I want the buffered result to maintain the shape of the original polygons (minus the narrow fingers):
Is there a way to achieve what I have done but somehow maintain the polygon boundary which was found in the original polygons?