On Mar 26, 2010, at 1:48 PM, Kurt Schwehr wrote:

> Since I'm parsing the original data, is seams a shame to have to leave python 
> to do a convex hull.  
> 
> Either way, it looks to me like there is a bug with boundary:
> 
> In [10]: line.wkt
> Out[10]: 'LINESTRING (-0.5000000000000000 0.5000000000000000, 
> -1.5000000000000000 1.2000000000000000, -1.0000000000000000 
> 1.0000000000000000, -0.5000000000000000 0.5000000000000000)'
> 
> In [13]: line.boundary.is_empty
> Out[13]: True
> 
> From the manual, it looks like boundary of a line shouldn't be empty.

This line has coincident points (-0.5 0.5) , maybe that's the problem.  

Given my attempts at doing so, I think my assertion about doing multi-million 
point hulls in Python or GEOS still stands :)

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