[GRASSLIST:5795] Re: Geometry/topology/Mapserver

[pradeep anakkathil]

Thanks Radim for the very clear reply! I am writing out a blank cheque for
Frank :-)

Pradeep

> On Monday 17 March 2003 12:22 pm, pradeep anakkathil wrote:
> > Hi All,
> >
> > A mixed bag of questions!
> >
> > (2) Why cant MapServer see PostGRASS/PostGIS polygons, but can only see
> > lines, boundaries and points?
> 
> Note: PostGIS is supported by 5.1.
> 
> PostGIS is not topological, GRASS is topological. GRASS stores
> boundaries of areas in PostGIS and topology (areas) are
> built and stored in GRASS. MapServer accesses PostGIS directly 
> and doesn't know about topology stored in GRASS.
> If you want to use GRASS areas in MapServer you can:
> 1) Export areas to polygon layer in PostGIS or shapefile (v.out.ogr)
> 2) Ask and pay Frank to add vector support for GRASS 5.1 to OGR
> 3) Write topology extension for PostGIS.
> 
> Radim
> 

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beginning...' - Richard Bach 
 
A.P.Pradeep Kumar 
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