[postgis-users] Question to postgis and topology

[Andy Anderson]

Hi, Nigel,

What aspect of topology do you want? There are many functions  
describing topological characteristics listed here:

	http://postgis.refractions.net/docs/ch06.html#id2595672

For example:

ST_Dimension(geometry)
ST_IsSimple(geometry)
ST_IsClosed(geometry)
ST_NumInteriorRings(geometry)

-- Andy


On Jun 4, 2008, at 5:26 AM, Nigel de_barrio wrote:

> Dear list,
>
> at the homepage of postgis I have read that postgis has basic  
> topology support.
>
> Can anyone give me an example for that please?
>
> Becaue, what I don`t understand:
>
> I wan`t to see the coordinates of a multipolygon.
> Of cource I get them with SELECT astext(the_geom) from table,
> I see then all the coordinates.
>
> But that does not say anything about topology , does it?
>
> Can anybody help please, thank you, Nigel
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