[mapserver-users] combine objects (was Rosa and CGI)

[Lowell.Filak]

Could a feature join be done in mapscript? Theoretically I believe yes,
because the nature of a shape is more like a region than it is a polygon. However
I have not tried combining two "in" shapeObjects into a single "out"
shapeObj. A step back may be required at this point to see if joinning the
shapes will cause more of a problem then it is worth. For example: if you
have two parcel polygons that both share a common parcel identifier but do
NOT share a common acreage you can not combine the individual polygons
into a single "shape" without loosing one of the distinct acreages or
combining the two acreages together before assigning the new acreage
value. If the CGI version does require a single record you may want to
look at using mapscript to handle the many-to-one or many-to-many
relationships.
My $0.02.
Lowell F.

On Tue, 14 May 2002, Richard Greenwood wrote:

> At 09:05 AM 5/14/2002 +0200, you wrote:
> >yes, it has two row in the database.
> >
> >how can I do the join?
> >(I have never used the join functionality and I don't know how to use it)
>
> I do not know how to do it with mapserver/mapscript, although there are
> some wizards on this list who might be able to. I'd suggest using MapInfo
> or ArcView. Do you have access to anything like  that? If you don't, and it
> is a small dataset, you can email it to me and I'll process it for you.
>
> Rich
>
>
> >Very Thanks.
> >
> >Stefano B.
> >
> >----- Original Message -----
> >From: "Richard Greenwood" <rich at GreenwoodMap.com>
> >To: "Stefano Bonnin" <shpr at libero.it>
> >Cc: <mapserver-users at lists.gis.umn.edu>
> >Sent: Monday, May 13, 2002 3:09 PM
> >Subject: Re: [mapserver-users] Rosa and CGI
> >
> >
> > >
> > > >The city of Milano has only one polygon, Torino instead has two polygon.
> > > >I believe that the Applet doesn't work when a city is composed by more
> >that
> > > >one polygon.
> > > >
> > > >.... but why?
> > >
> > >
> > > Is Torino one object or two objects? Bu "one object", I mean does it have
> > > just one row in the database? If it has two rows, that might be your
> > > problem, you need to join the two polygons into a single object. I do not
> > > think this is a problem related to Rosa, I think it is fundamental to
> > > mapserver.
> > >
> > > Rich
> > >
> > >
> > > Richard W. Greenwood, PLS
> > > Greenwood Mapping, Inc.
> > > Rich at GreenwoodMap.com
> > > (307) 733-0203
> > > http://www.GreenwoodMap.com
> >
> >
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