Hi,
your problem is the topology of the polygon. Your data are known as
spaghetti-data, i.e. each area needs a complete polygon, "shared"
boundaries are two linestrings.
Best way would be to get into grass. After importing your data into the
GRASS database, you will have benefit of full topology.
Make your edits within GRASS and later export the data back into e.g.
shapefile.
Lot's of documentation on handling vectordata within GRASS is available
in different web-ressources. Just search for GRASS vector import edit
Best
Kai
Am 27.06.2011 16:32, schrieb Laura Guillot:
I'm trying to reshape polygons of a lancover map, in order to make them
to be more
coincident with an overlaid raster image (orthophoto 1:5M).
If I just move the nodes to the correct position, I create a correct
line but leave a hole behind: the other
polygon keeps its line where it was. See a pict here:
https://sites.google.com/site/lguillotdummy/home/boundaryproblem.jpeg
Is there any way I could just move the lines as boundaries?
I've tried by converting poygons to lines first, but the problem is very
much the same: it seems like
there is always a double line, one for each adjacent polygon.
A possible solution would be having the lines automatically cut into
segments, each going from one vertex to another.
And having just one segment for each boundary. Is that possible? Is
there a process to cut into segments after running polygons to lines?
Or perhaps there is a cmpletely different way to accomplish the same
goal: modifying the boundaries between polygons.
Thanks!
L
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-user
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-user
