[geos-devel] createEmptyGeometry() creates instance ofGeometryCollection

[Martin Davis]

Good addition.... This standardizes on what is used to represent a "null" geometry.  I'll add this to JTS.

Martin Davis, Senior Technical Architect
Vivid Solutions Inc.      www.vividsolutions.com
Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5
Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046


> -----Original Message-----
> From: geos-devel-bounces at geos.refractions.net 
> [mailto:geos-devel-bounces at geos.refractions.net] On Behalf Of 
> strk at refractions.net
> Sent: March 30, 2006 10:12 AM
> To: GEOS Development List
> Subject: Re: [geos-devel] createEmptyGeometry() creates 
> instance ofGeometryCollection
> 
> 
> ::createEmptyGeometry() has been my own addition.
> It's not in JTS.
> I thought it was clearer then createGeometryCollection()
> An EMPTY geometry *is* a GeometryCollection with 0 elements.
> 
> --strk;
> 
> On Thu, Mar 30, 2006 at 12:50:43PM +0200, Mateusz Å?oskot wrote:
> > Hi,
> > 
> > Simple question, is this intentional to return empty 
> > GeometryCollection instance from createEmptyGeometry() function? 
> > Currently, this function does the same as 
> createGeometryCollection().
> > 
> > GeometryCollection*
> > GeometryFactory::createGeometryCollection() const
> > {
> >    return new GeometryCollection(NULL,this);
> > }
> > 
> > Geometry*
> > GeometryFactory::createEmptyGeometry() const
> > {
> >    return new GeometryCollection(NULL,this);
> > }
> > 
> > Cheers
> > --
> > Mateusz Łoskot
> > http://mateusz.loskot.net
> > 
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> > http://geos.refractions.net/mailman/listinfo/geos-devel
> 
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