Hello !
I'm trying to generate polygons from gdal contour output. Most of the
linestrings generated where closed, so it's not a too bad start. The
problem is to define interior and exterior of the polygon : it seems
that interior and exterior has no consistent meaning from the
linestrings (it makes sense though - a line has no interior nor than
exterior).
So what i need would be a method to recreate the meaning of the polygon
: the inside is where i have ground. To make it work, i just would have
to transform the polygon to an interior ring of a wider (whole area)
polygon when appropriate (when it does not contain a polygon with a
higher altitude).
What do you think about this ? is there a better/known way to achieve that ?
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