[Geowanking] GPS tagged JPGs?

[Pall Thayer]

Just bouncing around the web, I happened upon this: 
http://nwalsh.com/java/jpegrdf/jpegrdf.html Looks like something that 
could be used to insert RDF formatted geodata into jpeg metadata and 
read it as well. Have yet to take a proper look at it though. Could be 
cool if it works.

Palli

Douwe Osinga wrote:

> Hi,
> 
> At world66.com we have a rather large collection of CC licensed images,
> uploaded to specific locations of which we have the coordinates. As we
> generate resamples of those images on the fly, it would be possible to
> automatically geotag those images, which would be neat.
> 
> I've been back reading this thread as to what would be the best solution,
> but it either doesn't seem to come to a real conclusion, or I missed it.
> 
> Dirk-Willem van Gulik writes:
> 
>>I've found libexif and the usual RLE/netpb/jhead to work fine. I.e. to set
>>the 0x8825 gps field. Given the richness of EXIF I would expect that
>>a lot of what you want to do (including describing parts of the image)
>>can actually be natively encoded in exif.
> 
> This sounds like a plan, but maybe you could eloborate a bit, as the 'usual'
> isn't very usual for me. I played around a bit with jhead, but it mostly
> seems to extract EXIF headers, apart from setting time and rototation. I
> probably missed something here.
> 
> Alon J Salant writes:
> 
>>There seem to be some real benefits to using RDF in JPGs over EXIF -
>>it's a metadata standard that is interoperable with other systems, it's
>>easier to read and write with standard XML tools, and is extensible by
>>design.
> 
> I think the suggestion was to embed the RDF in a EXIF comment field.
> Currently I'm using ImageMagick convert to resample the images, so would
> using the -comment flag there be the way to go? Or what other tools should
> I use for this?
> 
> Thanks for any feedback,
> 
> Douwe Osinga
> 
> 
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Pall Thayer
artist/teacher
http://www.this.is/pallit
http://130.208.220.190/
http://130.208.220.190/nuharm/
http://130.208.220.190/panse/
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