[postgis-users] Amoeba Hulls

[Paul Ramsey]

William,

It doesn't look like this is a standard algorithm, but more likely a 
particular empirical technique provided by the particular software you 
were using.  So substituting some other technique might yield a 
different shape entirely... do any of the techniques mentioned here 
<http://www.geospatial-online.com/geospatialsolutions/article/articleDetail.jsp?id=1348> 
sound like what was done to your data?

Paul

William Andersen wrote:
> 
> I'm fairly new to postgis, and working to automate a number of
> processes.
> 
> We are trying to compute market area polygons that look like the
> attached image. These were created by some older software.
> 
> 
> They are referred to as Amoeba Hulls, and they contain 80% of a
> store's customers. However I can't find any solid documentation that
> would allow me to reproduce them.
> 
> Does anyone have any ideas how these shapes are created or an
> alternate name that I might be able to google? Additionally, we may
> be in a position to finance the development of this feature.
>