[postgis-users] PointM, PolyLineM, PolygonM

[strk]

pramsey wrote:
> What do people think about supporting measures in general? There are two 
> possibilities:
> 
> (a) keep the geometries as they are and have and "measure dependant" 
> functions assume that the coordinates are (X,Y,M)
> (b) expand to 4-d standard geometries, (X,Y,Z,M)
> 
> I lean towards option (a), since most people aren't even using xyz 
> geometries now, let alone xyzm. A little flag on the geometry could 
> indicate whether the geometry is xym or xyz.
> 
> Any then of course we'd need to figure out what useful "measure-smart" 
> functions would be useful for a LRS implementation in postgis.

I do not know what are measured geometries used for, what about, in the
meanwhile, putting the measure out of the geometry ? I really can't imagine
when would you need a measure since you have associated attributes with
values and SQL !

--strk;


> P.
> 
> strk wrote:
> > Hello Jeff,
> > are you planning to include any kind of support for
> > shapefile "measured geometries" types in shp2pgsql ?
> > 
> 
> 
> -- 
>        __
>       /
>       | Paul Ramsey
>       | Refractions Research
>       | Email: pramsey at refractions.net
>       | Phone: (250) 885-0632
>       \_
> 
> 
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