AW: Re: [postgis-users] dynamic segmentation

[Düster Horst]

Perhaps I'm wrong, but take a look at the PostGIS Documentation
http://postgis.refractions.net/docs/ch06.html#id2529854

All the things you are looking for are described here.

Cheers,
Horst

-----Ursprüngliche Nachricht-----
Von: Brent Wood [mailto:pcreso at pcreso.com]
Gesendet am: Freitag, 17. November 2006 03:36
An: PostGIS Users Discussion
Betreff: Re: [postgis-users] dynamic segmentation


P Kishor wrote:
> Someone asked me recently about open source dynamic segmentation
> solutions. I thought, let's ask the PostGIS community. Is this
> possible with PostGIS? If not, does anyone know of other open source
> solutions for ds?

It sort of depende what you do with dynamic segmentation, some is easily
doable
with PostGIS, other stuff is harder.

For example, having a single line feature, representing say, a pipeline.

DS can allow various segments of this to have some different attributes,
like
identifying steel & concrete, or above ground & underground sections.
You can't
do this quite the same way in PostGIS, but having separate features with
a
common attribute, such as 5 separate line segments with a common
pipeline_id,
as well as a multiline/geometrycollection representing the composite
feature
means you can achieve comparable functionality using appropriate SQL &
data
structures.

So does PostGIS "do" dynamic segmentation? Strictly speaking, not
really.

Can functionality equivalent to dynamic segmentation be implemented
using
PostGIS? Quite often yes.


Cheers,
  
  Brent Wood


 
________________________________________________________________________
____________
Sponsored Link

Mortgage rates near 39yr lows. 
$510k for $1,698/mo. Calculate new payment! 
www.LowerMyBills.com/lre
_______________________________________________
postgis-users mailing list
postgis-users at postgis.refractions.net
http://postgis.refractions.net/mailman/listinfo/postgis-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.refractions.net/pipermail/postgis-users/attachments/20061117/815e3ec1/attachment.html