[OSM-talk] geotagged images in josm

Luka Frelih luka at ljudmila.org
Sun Jul 29 19:21:08 BST 2007

wow, yes, it really works very well.
i have set the time on the camera to utc some days ago (on intuition) so 
i didn't even have to set the timezone.
thanks a lot for the instructions.

naturally, now i have more questions (enhancement requests?):
- is there some way yet to get the geotags out of the josm session
 a) into the exif tags of images?
 b) into an .osm format file or data layer?

and some "nitpicks" (as these issues can be worked around fairly easily)
- the images have to be exif tagged, their file creation date or 
filename is not considered in getting the time information (filename 
sounds weird, i know, but it is more stable than ctime/mtime when 
copying around)
- image files with extensions other than jpg (jpeg, for example) cannot 
be selected for import
- images already online have to be downloaded first (in connection with 
question b above)


Andy Robinson wrote:
> Frederik Ramm wrote:
>> Sent: 29 July 2007 8:19 AM
>> To: Franc Carter
>> Cc: OSM-Talk Openstreetmap
>> Subject: Re: [OSM-talk] geotagged images in josm
>> Hi,
>>> It's a standard feature, after you load a gpx trace in, there will be an
>>> option
>>> in the layers menu to 'import images'.
>> To clarify: The whole thing is about automatically matching images to
>> GPS positions by comparing image timestamps and GPX times. It does not
>> depend on tags at all (in fact, it works even without any OSM data loaded).
> And to clarify one step further it's important to ensure the timestamps on
> the photos are synchronised with the gpx time. The easiest way do this by
> taking a photo of your gps receiver displaying the time. Then once you have
> loaded your images into JOSM you right click the image layer and then hit
> sync from the menu. This allows you to load the particular image you took
> displaying the time and manually adjust the time to what is shown. I find it
> a lot easier to have the camera set for UTC since that's what my GARMIN is
> spewing out in the gpx trace. I find that my camera time goes off by about 1
> second a day so I have to generally make this sync correction each day I
> edit.
> Note that none of your photos might appear in JOSM if there is no match with
> the GPX timings (ie the layer shows up but none of the little picture icons
> show with your gpx trace). They will all align correctly once the sync
> process is made properly.
> Note also that some cameras do not record the time precisely enough (ie no
> seconds) which generally makes it pretty much useless for this process.
> Once you get it working it is really worthwhile. I take around one
> photograph a minute when urban mapping and I'd really be stuck without this
> excellent facility in JOSM.
> Cheers
> Andy
> Andy Robinson
> Andy_J_Robinson at blueyonder.co.uk
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