[mapserver-users] multilinestring and linestring

[Steve Grey]

Suman,

Also try ST_LineMerge for merging the indivudal linestring elements of a
single multilinestring into a single linestring (where the lines connect).
ST_Union is expensive, although I believe work has been done on aggregated
geometry functions in the later/latest postgis releases.

Steve


2009/9/16 Suman Chatterjee <schatterjee at addisontx.gov>

> Hi Pavel!
> Thanks a lot for your help. St_union is really helpful. Now I am able to do
> it
> Suman
>
> -----Original Message-----
> From: Pavel Iacovlev [mailto:iacovlev.pavel at gmail.com]
> Sent: Wednesday, September 16, 2009 8:44 AM
> To: Suman Chatterjee
> Cc: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] multilinestring and linestring
>
> 1) You can convert multiple multilinestrings into 1 multilinestring
> with st_union
> 2) st_multi()
>
> On Wed, Sep 16, 2009 at 4:30 PM, Suman Chatterjee
> <schatterjee at addisontx.gov> wrote:
> > Hi all,
> >
> > I want to know :
> >
> >
> >
> > 1)       Is there any way to convert many Multilinestring geometry into
> one
> > linestring geometry?
> >
> >
> >
> > I need to enter linestring geometry into a table with check constraint
> > "enforce_geotype_the_geom" meant for Multilinestring . So I need to
> convert
> > the linestring to a multilinestring
> >
> >
> >
> > 2)       How can I convert a linestring to a multilinestring?
> >
> >
> >
> > Thanks
> >
> > Suman
> >
> >
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