"Anthony" <wikitech(a)inbox.org> wrote in
message news:71cd4dd90706040629s193d5845q277b8233044f3ad4@mail.gmail.com
...
Right, take that photo in the example and pretend we don't know the
position
of the photographer. Also assume we don't
know the focal length, or
type
of
camera, or even whether or not the image has been
cropped. There's no
easy
way to extract the location of the photographer
from just that
photograph.
You can, however, tag the image with the location
of one of the two
buildings, or even both of the two buildings. If you do know the
location
of the photographer, you could even tag all three
points, hopefully with
some metadata saying that one of the three points was the photographer's
location.
So it appears that my suggestion that the possibilty of adding multiple
named tags (rather than just a single co-ordinate pair) would actually be
useful on commons after all...
IMO, yes. [[Image:Nationalmuseum.jpg]] for instance is tagged with two
locations, that of the photographer, and that of the subject.
I also noticed something - [[Image:Nationalmuseum.jpg]] gives a "Subject
distance" of 65.535 metres, which is significantly closer than the museum,
at 270 meters. So using that figure probably doesn't make a lot of sense,
as a photographer is often going to focus in front of the actual subject of
a picture (see [[hyperfocal distance]], for instance).