Dear Jake,
you can use the topological editing. In Settings/Snap options dialog
enable topological editing, check Avoid Intersections for the editing
layer and optionally set a tolerance for snapping.
After it you have to draw only the missing part of the a new polygons.
Regards,
Zoltan
On Tue, 9 Jul 2013, Jake Maier wrote:
I want to create a new polygon and in one area it should follow the segments
of another polygon .
(I have a forest and want to delineate the stands.) Which plug-in can I use
to tell the program that from here to there it should just follow an
existing polygon either in the same shapefile (stands) or possibly in
another shapefile (boundaries)
Thank you for your help
Jake
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