[postgis-users] GEOS union() error

[Obe, Regina]

Lee,

Did you try the collect buffer?

I'm not sure why we have that explicit in the documentation - could be
left over from another time? Should we remove that from the
documentation.

I've done it and it works fine except when I had some invalid geometries
I think it created some strange results but never errored out.

Hope that helps,
Regina
 

-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Lee
Keel
Sent: Wednesday, November 07, 2007 9:14 AM
To: PostGIS Users Discussion
Subject: RE: [postgis-users] GEOS union() error

> -----Original Message-----
> From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-
> bounces at postgis.refractions.net] On Behalf Of Paul Ramsey
> Sent: Tuesday, November 06, 2007 4:55 PM
> To: PostGIS Users Discussion
> Subject: Re: [postgis-users] GEOS union() error
> 
> Lee, what are you going to do with this beast once you have created
it?
> P
> 
> On 6-Nov-07, at 10:41 AM, Lee Keel wrote:
> 


Paul,

My client needs this information to generate a shape file for "call
before
you dig" information.  They are a gas company and they have to output
this
information all the time, the problem for them is that it is becoming a
full
time job to take a shape file, open it in Arcmap, do the buffering,
reproject the data and then save.  I told them that this could all be
done
in one query in the spatial database that we were using.  But obviously,
I
have run into some snags.

Also, to combine chains...  I did not use collect on the geometries
column
and pass that to buffer because it is very explicit in the online help
not
to pass GeometryCollection as argument to buffer.

Thanks for the responses.  I look forward to any more helpful ideas.
Lee
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