On 2015-11-23 12:00, Even Rouault wrote:
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...
I apologize, clearly I am not thinking straight today. What I meant to
say is that Ivan made me realize why the DGN driver was probably not
implemented by using DGNDirect or Teigha: there was some sort of spec
available: http://dgnlib.maptools.org/dgn.html.
So, I agree that if using an Open Design library to support such a
format can be avoided, it would make sense to do so, given their
licensing. Like I said, I wasn't thinking of that when I first replied.
Kind regards,
André
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-boun...@lists.osgeo.org> on behalf of Andre
Vautour <andre.vaut...@caris.com> Sent: Monday, November 23, 2015 9:58
AM
To: Brad Hards
Cc: gdal-dev@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
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