geotagging: digikam refuses to add coordinates to raw files

[Markus Spring]

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Hi list,

enthusiastically geotagging my pictures with the interactive editor (Santa
forgot to bring that cute Sony GPS) I had to learn that digikam does not write
the coordinates to my Minolta .mrw files. But why?

Could somebody shed light on this?

Thanks - Markus

P.S. see my geotagged pictures on http://spring2life.blogspot.com or
http://flickr.com/photos/springm
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[Hubert Figuiere-3]

Markus Spring wrote:
> Hi list,
>
> enthusiastically geotagging my pictures with the interactive editor (Santa
> forgot to bring that cute Sony GPS) I had to learn that digikam does not write
> the coordinates to my Minolta .mrw files. But why?
>
> Could somebody shed light on this?

RAW files a prorietary and undocumented, therefor digikam does not
support re-writing them (hopefuly).

the solution is to beg for the support of sidecar XMP files.


Hub
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[Gilles Caulier-2]

On Wednesday 10 January 2007 19:41, Markus Spring wrote:
> Hi list,
>
> enthusiastically geotagging my pictures with the interactive editor (Santa
> forgot to bring that cute Sony GPS) I had to learn that digikam does not
> write the coordinates to my Minolta .mrw files. But why?
>
> Could somebody shed light on this?
>

Writing a metadata in a picture file is dedicaced by Exiv2 library. Actually
only JPEG file can be written. all other can be only read.

I'm working on PNG writting codec, and Andreas, on the TIFF writting codec.
This will be availble on next Exiv2 release.

Also, in the future, GPS info (and also others stuff) will be stored in
digiKam database. This will solve your problem about geotagging.

Gilles
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[Markus Spring]

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Hubert Figuiere schrieb:
> RAW files a prorietary and undocumented, therefor digikam does not
> support re-writing them (hopefuly).

Image::Exiftool does, so I do not see a principal difficulty therein

> the solution is to beg for the support of sidecar XMP files.

Well - I have ufraw sidecar files as well as bibble ones - and you have to be
careful to rename them all along if you do so with the image file. It's going to
make things even more complicated...

But I would take them if that could make up for a central place where all
meta-information is stored.

To stay with the current digikam solutions: Why not store this information in
the database if you don't want to mess around with proprietary file formats?

Regards - Markus
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[Gilles Caulier-2]

Le jeudi 11 janvier 2007 10:36, Markus Spring a écrit :
> Hubert Figuiere schrieb:
> > RAW files a prorietary and undocumented, therefor digikam does not
> > support re-writing them (hopefuly).
>
> Image::Exiftool does, so I do not see a principal difficulty therein

Yes, I think so it's possible with TIFF like RAW format like NEF or CR2.

>
> > the solution is to beg for the support of sidecar XMP files.
>
> Well - I have ufraw sidecar files as well as bibble ones - and you have to
> be careful to rename them all along if you do so with the image file. It's
> going to make things even more complicated...
>
> But I would take them if that could make up for a central place where all
> meta-information is stored.
>
> To stay with the current digikam solutions: Why not store this information
> in the database if you don't want to mess around with proprietary file
> formats?

Marcus, it's planed to the future to improve database format. We will ad new
table to store more informations.

Gilles
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