[gdal-dev] unable to open DGN

[Even Rouault]

Le lundi 23 novembre 2015 16:48:48, Andre Vautour a écrit :
> Right, thanks, I wasn't thinking of that when I wrote my reply.
> 
> Guess it makes sense for a closed format such as DWG. Might not make as
> much sense to use it for DGN which is more open

DGN v8: open ? If you have pointers to a spec, I think that would be much 
appreciated by a lot of people...

> and does not need to be
> reverse engineered.
> André
> 
> On 2015-11-23 11:41, Ivan Lucena wrote:
> > Just a comment on that: In order to build the DWG driver, you or your
> > company, need to be part of some kind of alliance to be able to download
> > a full version of the Teigha SDK. AFAIK
> > 
> > ________________________________________
> > From: gdal-dev <gdal-dev-bounces at lists.osgeo.org> on behalf of Andre
> > Vautour <andre.vautour at caris.com> Sent: Monday, November 23, 2015 9:58
> > AM
> > To: Brad Hards
> > Cc: gdal-dev at lists.osgeo.org
> > Subject: Re: [gdal-dev] unable to open DGN
> > 
> > On 2015-11-20 17:40, Brad Hards wrote:
> >> On Fri, 20 Nov 2015 02:20:55 PM Martin Landa wrote:
> >>> I am trying to open sample DGN file, but it fails. I guess that the
> >>> reason is unsupported version (man pages says: Microstation DGN files
> >>> from Microstation versions predating version 8.0 are supported for
> >>> reading.)
> >> 
> >> As I understand it, version 8 is completely different.
> >> 
> >>> Is there any possibility how to read this file using GDAL library?
> >> 
> >> AFAICT, not unless you figure out version 8 format and implement it, or
> >> pay someone to do that work for you.
> > 
> > I just want to add that Teigha, which can currently be used to open DWG
> > in GDAL, does support DGN version 8. So, if someone wants to add that
> > support, I'd suggest looking at the DWG driver.
> > 
> > The DWG driver has:
> > class OGRDWGServices : public ExSystemServices, public ExHostAppServices
> > 
> > You'd need to have something like:
> > class OGRDGNServices : public OdRxSystemServices, public
> > OdDgHostAppServices
> > 
> > I would not be surprised if considerable chunks of the DWG driver could
> > be generalized to work for both DWG and DGN,
> > André
> > 
> >>    Is it possibly to get the originator to
> >> 
> >> provide it in some other format (e.g. DXF, noting that will lose the
> >> georeferencing)?
> >> 
> >> Brad
> >> _______________________________________________
> >> gdal-dev mailing list
> >> gdal-dev at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> > 
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> 
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