[Gdal-dev] RFC 12: Improved File Management

[Ivan Lucena]

Ari,

Shouldn't that be the case only for shapefile just because the dbfs are been
recognized first by OGR? 

That could be the case because in dbf you can have a folder representing a
database where the contained dbf files are tables of that database, even
though that is not what the users think of their shapefile attribute table.

So the ODBC driver recognized the folder as a data source just because it
has dbf files on it.

Nice feature anyway,

Regards,

Ivan

-----Original Message-----
From: gdal-dev-bounces at lists.maptools.org
[mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of Frank Warmerdam
Sent: Monday, May 07, 2007 1:48 PM
To: Ari Jolma
Cc: gdal-dev
Subject: Re: [Gdal-dev] RFC 12: Improved File Management

Ari Jolma wrote:
> Frank Warmerdam kirjoitti:
>>
>> I normally think of OGRLayer's as being analygous to bands
> 
> Hmm, I've been using OGROpen with a directory name instead of filename. 
> Then I've been able to loop through all vector data layers (for example 
> shapefiles) in that directory. I've sometimes wondered what happens if 
> there are for example shapefiles _and_ mapinfo files in the same
directory.

Ari,

I see what you mean.  This is a convenience offered by some OGR drivers.

If a directory contains a mixture of shapefiles and mapinfo files any
attempt to open the directory will give you a shapefile datasource and
the mapinfo files will be ignored.

It's important to keep in mind that this "open a directory" support
is a feature of a driver, not OGR in general.  Only a couple drivers
support this and it isn't always done in an equivelent approach.

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    | President OSGeo, http://osgeo.org

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