For those trying to re-read metadata as a result of using an external GeoTagging application, and willing to get a bit dirty:
( from another post on this blog.. copied here for your convenience )

I was able to select all photos without GPS locations in two steps.
1) MySQL query directly on database to tag gps photos.
2) In Digikam, search for not having the hasGPS tag.

Step 1)
a)In Digikam, create a tag named hasGPS.
b)In Digikam, go to ‘Configure’ and look in ‘Collections’ to see the “Database File Path”.

c)Close DigiKam.

d) locate and make a backup copy of your digikam database.

e) Now, in SQLite Database Browser ( or anything that lets you run an sql query ) load the database and run the following query:

REPLACE INTO ImageTags (imageid,tagid)
SELECT imageid, (SELECT id from Tags WHERE name=’hasGPS’)
FROM ImagePositions WHERE imageid>0

Now go back to digiKam.

Step 2)
In DigiKam, go to Advanced Search.
a) click on the little ‘options’ lettering and choose ‘None of these conditions are met’
b) under ‘File, Album, Tags’ select your ‘hasGPS’ tag.
c) click ‘OK’ !

This post was mentioned on Twitter by dmpop: Fresh Scribbles: Finding Geotagged Photos in digiKam http://wp.me/pEQNe-3R…

Thanks for explaning it – I didn’t try the CTRL and shift-key.

Btw. in the current version digikam can display the photos on openstreetmap maps.

See my blog post: http://neuntoeter.wordpress.com/2009/11/03/digikam-1-0-0-beta5-verwendet-openstreetmap-karten/