my problem: I have a polygon-file in shape-format, which I need to generalize. How can "split" the polygons into lines, generalize and than "rebuild" the polygons, so that I can ensure, that there are no topological errors like "slivers". Please give a rookie some adive howto do this in quantumgis.
Thank you very much
I already tried:
Vector -> Geometry Tools -> polygones to lines
Vector -> Geometry Tools -> simplfy geometries
here I can already see on the screen, that I am producing overlaps and gaps nevertheless now I try
Vector -> Geometry Tools -> lines to polgones
and here the program show an error and crahes