Comments on Frederic Crozat blog: Geotag photography with n810

I don't see the point in uploading random (ie obta...

2008-04-01T12:03:00.953+02:00

I don't see the point in uploading random (ie obtained in a photo shoot session) "by foot" tracks to OpenStreetMap, since they can't be useful to anybody to create maps.

Interesting thoughts. I hope to geo-tag photos fro...

2008-04-01T11:45:23.251+02:00

Interesting thoughts. I hope to geo-tag photos from my next trips too.

Oh, and I think this should be cross-referenced at planet.maemo.org as well!

You could also upload your tracks to OpenStreetMap...

2008-04-01T11:31:09.428+02:00

You could also upload your tracks to OpenStreetMap even if you don't do any mapping yourself.

I know it's rare, but sometimes I process several ...

2008-04-01T11:03:33.431+02:00

I know it's rare, but sometimes I process several versions of a same raw: a black and white version for instance, and a color version. Also, I can't consider myself as a good photograph, neither a advanced user of raw softwares. So I know that in a couple of months or years, I will probably reprocessed some raws. So it's quite annoying for me to include a geotagging in a JPG. I wouldn't mind to put the geotagging in a side file, but it's suboptimal to me. But it's just my point of view of course.

About Geotag, the website states that it can write to CR2. But it probably requires to install the needed dependencies?

Thanks for the info, but I'm still think it is bes...

2008-04-01T00:25:53.091+02:00

Thanks for the info, but I'm still think it is best to let raw files untouched and store those changes elsewhere. I don't understand why you need to repeat your changes on each jpeg versions : once you did the change on the first version, it will be available on derived versions.

I didn't test Geotag before. I've checked it quickly and it is quite nice, with integration with Google Maps. BTW, it didn't seem to handle CR2 files.

with Exiftool, you can modify your RAW file. I don...

2008-04-01T00:03:54.365+02:00

with Exiftool, you can modify your RAW file. I don't know if it's very reliable, but I had to adjust the date and time of dozens of RAW photos because my cam was set to the wrong date. I did it directly on the .cr2 with this tool, and it's working quite well. So maybe it's possible to use it to modify the geotags also. Geotag seems to be able to do it:

http://geotag.sourceforge.net/?q=node/14

I really hate to have to repeat the same thing for each different jpg version I process, that's why i'm trying to find a way to geotag my RAWs once for all. So maybe there is hope for a reliable geotagging of Raw files? At least CR2, that's all I would ask for...

No, François, there is no utility providing write ...

2008-03-31T23:44:18.016+02:00

No, François, there is no utility providing write support on RAW file. Some tools (like Digikam) can save additional metadata in an supplementary file in XMP format (if your file is named img_0101.cr2 for Canon, additional metadata will be saved in img_0101.xmp). This allows to easily export metadata which are often only available in photo software database.

And remember you can't do anything with RAW files "directly", you will need to develop them either to JPG, PNG or TIFF.

Thanks Frederic. It's clearer to me now. I can jus...

2008-03-31T23:38:19.333+02:00

Thanks Frederic. It's clearer to me now. I can just see that we cannot do it for bad reasons (proprietary format...). It's still possible to change some meta data in a RAW file (like the dates and times), it is possible thanks to some reverse engineering of the RAW format? And is it too optimistic to hope for the same possility for geotagging?

Thanks philn, I've also tested gps_saver but I kin...

2008-03-31T23:33:40.367+02:00

Thanks philn, I've also tested gps_saver but I kind of prefer Maemo-Mapper : more functionalites and you have the same power consumption.

François :
by definition, RAW files are read-only, because their are in proprietary format (I'm not talking about DNG format, since there is still no way to convert a RAW file to DNG without any information loss), so you can't attach any kind of geotag to them.

With gps_correlate, you can give a entire session of photos (ie after your developed them from RAW to JPEG) and geotag them in one action.

I have a very stupid question: why are you geotagg...

2008-03-31T23:12:42.259+02:00

I have a very stupid question: why are you geotagging your JPG and not the RAW files? Apparently it's not possible to do it on RAW, i tried with Digikam. I find this a pity, as you need to geotag the same photo several times if you process several jpg. It just doesn't make sense. It should be in the RAW, as it's an information related to the original shot, and not about any processed jpg version. It should also follow in the tags of the JPGs. Can someone explain me this choice?

Some interesting stuff at http://maemo.org/communi...

2008-03-31T23:01:42.707+02:00

Some interesting stuff at http://maemo.org/community/wiki/HowToUseGPSFrameworkInOS2007

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