Ben,
I am finally replying to your most helpful post about shapefile generation.
Indeed, we found that turning off multipolygon path simplification just before
the call to_polygons() did the trick:
we find that multipolygons now preserve all of the vertices that define them --
in some cases in excess of 10K points.
Thanks so much for pointing us in the right direction.
Mark
On 09/13/11, Benjamin Root <ben.r...@ou.edu> wrote:
>
>
> On Tue, Sep 13, 2011 at 1:02 PM, Leidner, Mark <mleid...@aer.com> wrote:
>
>
> >
> > Ben,
> >
> >
> > Good to hear from you.
> >
> >
> > We are using matplotlib v1.0.1_5 on an install from Macports.
> >
> >
> > Hearing that there is simplification logic is very intriguing.
> >
> >
> >
> > Mark
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> Try this and tell me if the results are better. Right before the line where
> you call to_polygons(), add this line:
>
> multipolygon.should_simplify = False
>
> The simplification logic gets triggered automatically if the
> rcParam['path.simplify'] is True and if there are more them 128 vertices and
> those vertices are all simple LINETO segments. I think in your situation,
> this is true. So, we can force a non-simplification directly like above, or
> set your rcParams file with path.simplify to False (but this may make graph
> rendering significantly slower and more resource intensive overall).
>
> The path simplification logic is designed so that one does not see any visual
> differences, however, there might need to be some additional logic for those
> who are accessing the path directly.
>
> I hope this helps!
> Ben Root
>
>
>
>
>
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