Agreed. A default tolerance must not be tolerated ;) On Nov 10, 2009, at 7:02 PM, Helge Jensen wrote:
> With regards to the choice between mirroring the GEOS api or a more > "pythonic" approach, please take my input with a grain of salt as I > have only just started using shapely :) > > However you already have pythonic wrapping of the geometries and > have simplify(*) as member-functions, not free functions, so my > personal feeling about it is that you are already quite a long way > down the road of a pythonic library and not a mirror of the geos API. > > Shapely doesn't "feel" like GEOS, nor is it limited to GEOS, and > frankly, it is nice with a pythonic python-gis library for a change > (as opposed to, the GDAL bindings for example). > > I don't think there are any strong candidates for a default tolerance. > > One could argue (very weakly, in my eyes) for either 0.0, float- > epsilon or 1.0 as the default tolerance, but I think those are all > rather sought. I would personally prefer that there was no default. > > On Tue, Nov 10, 2009 at 1:36 PM, Aron Bierbaum > <[email protected]> wrote: > I had considered adding something like that, but I didn't know if > Shapley was meant to mirror the GEOS API more closely. I completely > agree that it makes more sense as a single method. It appears that > people agree that by default we should preserve topology too. > > I also tried to find a default value for the tolerance. Any ideas > opinions on a default for this? As far as I could tell there was no > default in GEOS? > > -Aron > > Aron Bierbaum > Software Engineer > Priority 5 > > On Nov 10, 2009, at 4:40 AM, Helge Jensen <[email protected]> wrote: > > > By the principle of "least-surprise" preserve_topology should > > probably default to True. > > > > Powerusers will probably know that preserve_topology=True is more > > costly. Perhaps documentation could reflect this? > > > > There is some documentation in the GEOS headers > > (DouglasPeuckerSimplifier.h and TopologyPreservingSimplifier.h) that > > could be repeated for the simplify function. > > > > > > -- > > Helge Jensen > > Partner & Senior Software Developer > > > > > > _______________________________________________ > > Community mailing list > > [email protected] > > http://lists.gispython.org/mailman/listinfo/community > _______________________________________________ > Community mailing list > [email protected] > http://lists.gispython.org/mailman/listinfo/community > > > > -- > Helge Jensen > Partner & Senior Software Developer > > > _______________________________________________ > Community mailing list > [email protected] > http://lists.gispython.org/mailman/listinfo/community -- Sean Gillies Programmer Institute for the Study of the Ancient World New York University -- Sean _______________________________________________ Community mailing list [email protected] http://lists.gispython.org/mailman/listinfo/community
