[postgis-users] Can postGIS database views work like .ARP project files?

[kreshna_iceheart at yahoo.com]

Hi Dane,

I actually have two goals:

1) I have several adjacent .SHP files that belong to
the same logical layer (they are pieces of street
network in a city). Naturally, I want to put them all
on the same table to make a big layer of street lines.
However, achieving this goal is quite easy since
SHP2PGSQL utility allows you to add SHP files to
existing tables (as opposed to creating new tables).

2) But yes, my second goal is like you described: to
create a postgreSQL database VIEW (instead of table)
that contain polygon, line, and point data.

And yes, this database view is supposed to act like
project file. Thus, user just need to open the
database views to see the project, instead opening
project file(s) on her/his local hard drive.

See, the goal is to eliminate the need of project
files, and replace them with database views instead.
Database views are more organized because they are
stored in the database server, as oppossed to project
files that are scattered through each user's local
hard drive.

So how to achieve the goal? Can the geomunion function
help me create such view that contains polygon, lines,
and points?

Thanks,
-Kresh 

--- Dane Springmeyer <blake at hailmail.net> wrote:

> Hi Kreshna,
> 
> Do you mean to visualize your data? To actually view
> it in a map  
> interface?
> 
> Postgis is just a backend for storage, analysis, and
> data  
> manipulation. You can have tables within postgis
> that contain both  
> polygon, line and point data in one table if you
> want to. But I don't  
> think that is what you are asking.
> 
> If you want to view an overlay of different data
> then you need to load  
> your shapefiles in the data viewer like QGis or
> uDig, then save  
> "projects" that view all the data layers together.
> 
> Let me know if I can help anymore,
> 
> dane
> 
> 
> On Feb 25, 2008, at 8:47 PM,
> kreshna_iceheart at yahoo.com wrote:
> 
> > I wonder about a thing:
> >
> > Does postGIS have spatial-related database views
> that
> > work like ArcView .ARP project files?
> >
> > See, with project files, it is possible to combine
> > several SHP files of various types (polygons,
> lines,
> > etc) , in a single view.
> >
> > Now, is it possible to to such thing with postGIS
> > database? Are there views to combine various types
> of
> > spatial tables? (polygons, lines, etc)
> >
> > Many thanks,
> > -Kresh
> >
> >
>
__________________________________________________________________
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> to hell with love,  
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> > computer games, and all the shit life keeps
> pumping at me. I'll walk  
> > alone, but with freedom and a healed pride.
> >
> >
> >       
> >
>
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__________________________________________________________________
So be it. If saying "NO" means being alone, then to hell with love, with women, with marriage, with God, religions, bars, nightclubs, computer games, and all the shit life keeps pumping at me. I'll walk alone, but with freedom and a healed pride.


      ____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page. 
http://www.yahoo.com/r/hs