I heard from a 'reliable source' that they didn't grab geotagged photos for this run because of privacy concerns.
I just geocoded some 2800 photos with some hacked together scripts which I could share with you, but they are so ugly they might make you go blind :-) Calculating offsets can be a bit of a pain if you don't have a sync point, but the key is to iterate: geocode some photos with known locations, then see what the code says. The Daylight savings time thing isn't that big a problem (at least, it wasn't for me) because my GPS tracklogs all downloaded in UTC. Cheers, Rich On 8/29/06, Dan Brickley <[EMAIL PROTECTED]> wrote:
Lars Aronsson wrote: > So, after one year with a GPS receiver, my disk is full with 6500 > digital photos and 100 GPX files. In theory I should be able to > geocode them all with just some simple script. But in reality I > don't know if my camera's clock was accurate within a few minutes, > and I know I forgot to change it to daylight savings time for a > few months. So the timestamps could be out of sync by a few > minutes or a whole hour. But in that case, exactly the same time > shift is likely to apply to the previous and next 100 images or > so. However, if there are no GPS samples within, say, 20 minutes, > the photo should perhaps not be geocoded at all. > > What software should I use for geocoding these photos? I cannot > spend two minutes per picture, since that would take 217 work > hours or five full weeks. I could spend 10 hours, which would > average 5 seconds per photo. I need to be highly productive. > > I guess if I only use the simple script, I'll get within an hour > or roughly 100 km. Perhaps that's an OK start. Does anybody have > a useful program for Linux laying around? > > Glad you mentioned it. I found such a thing a couple years ago, geoloc_media.pl ... not sure even whose it was. I did a bit of rewriting, see notes at http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl ...basically switched the EXIF library so it can write as well as read (and i think moved to pure perl; was Image::ExifTool instead of Image::EXIF). It uses some handy CPAN modules too, in particular Rich Gibson's Geo::Track::Log, see http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm ("Represent track logs and find a location based on a track log and a date."). Googling, I find the original at http://locative.us/photomap/geoloc_media.pl tho dunno if it's evolved since my little fork. Have fun, Dan ps. Flickr have launched their mapping thingumy. http://blog.flickr.com/flickrblog/2006/08/great_shot_wher.html It noticed a couple of already geo-tagged pics when I ran their Map-enabled Organizer. I don't know if it spotted the lat/long tags, ...or the embedded Exif which I added via this script. Presumably the former, thinking in terms of server-load...? _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
-- Rich Gibson Chief Scientist, Locative Technologies http://mappinghacks.com http://geocoder.us http://testingrange.com AIM period3equals _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
