FW: Re: [Gdal-dev] Save a map from a OGRDataSource

[Josepo Urrutia]

My idea is to use S-57 format to save a map that I've in a
OGRDataSource class.


>From: Frank Warmerdam <warmerdam at pobox.com>
>Reply-To: Frank Warmerdam <warmerdam at pobox.com>
>To: Josepo Urrutia <find_all at hotmail.com>
>CC: gdal-dev at lists.maptools.org
>Subject: Re: [Gdal-dev] Save a map from a OGRDataSource
>Date: Tue, 27 Sep 2005 11:53:51 -0400
>
>On 9/27/05, Josepo Urrutia <find_all at hotmail.com> wrote:
> >
> > I want to program a topographical map editor using the GDAL/ORG library, 
>I
> > create a OGRDataSource with the ORGLayers and OGRFeatures that represent 
>the
> > map.
> >
> > The problem is that I haven't been able to found a way to save this
> > OGRDataSource into a topographical map on disk.
> >
> > Which is the proper way to save a map with GDAL/OGR ?
>
>Josepo,
>
>I'm afraid you will need to tell my a bit about what you mean by saving
>into "a topological map on disk".   At first I thought you meant a raster
>rendering of the data but that wouldn't be very topological.
>
>I would note that:
>  o OGR (and GDAL) does not including rendering vector to raster
>     capability.  In general you would need to use something built on top
>     of OGR for this.  Something like Mapserver for instance.
>
>  o OGR does not "understand" topology.  In some case topology
>     relationships are preserved in attributes (such as for the Arc/info
>     Binary Coverage driver) but that doesn't mean that OGR understands
>     or can take particular advantage of it.
>
>Best regards,
>--
>---------------------------------------+--------------------------------------
>I set the clouds in motion - turn up   | Frank Warmerdam, 
>warmerdam at pobox.com
>light and sound - activate the windows | http://pobox.com/~warmerdam
>and watch the world go round - Rush    | Geospatial Programmer for Rent