dealing with mixed geometry datasets

[Emil Zegers]

Hello Frank,

Last year I already filed an enhancement request for this specific
issue in Bugzilla under number 1129.

Best regards,

Emil


----- Oorspronkelijk bericht -----
Van: Frank Warmerdam <fwarmerdam at GMAIL.COM>
Datum: maandag, mei 9, 2005 3:57 pm
Onderwerp: Re: [UMN_MAPSERVER-USERS] dealing with mixed geometry
datasets

> On 5/9/05, Bart van den Eijnden <BEN at syncera-itsolutions.nl> wrote:
> > Hi list,
> >
> > does anybody have some best practices for dealing with mixed
> geometry datasets within Mapserver?
>
> Bart,
>
> The best practice is to pre-split them into separate files!
>
> > For instance Mapinfo files which contain both points and polygons.
> >
> > Is it possible to do an OGR query based on geometry type and use
> 2 layers in the MAP file?
>
> There is no mechanism currently for querying based on geometry
> type in MapServer or OGR.   I briefly looked into adding some sort
> of capability to do this in OGR but it seems pretty involved.  It
> couldbe hacked into the OGR connector for MapServer pretty easiliy
> though.  Something along the lines of a PROCESSING directive
> that only works for connection type OGR.
>
> You might want to file an enhancement request to this effect.
> Keep in mind that it wouldn't be terrible efficient since it would
> need to scan the source layer once for each map layer, just
> discarding features with the wrong geometry type once they have
> been read.
>
> Best regards,
> --
> ---------------------------------------+---------------------------
> -----------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.comlight and sound - activate the windows |
> http://pobox.com/~warmerdamand watch the world go round - Rush
> | Geospatial Programmer for Rent
>