[Tagging] Photo links in OSM

[Zecke]

Am 11.06.2013 23:19, schrieb Martin Koppenhoefer:
>
>     Here is image=File:Dresden Theaterplatz 138.JPG
>
>
>
> wouldn't it be better to have all values tagged according to the same 
> rules, i.e. use a fully qualified url for the image tag?
> http://commons.wikimedia.org/wiki/File:Dresden_Theaterplatz_138.JPG
>
I fully agree. There's actually no need for distinction of image origin 
in the tagging scheme. Any distinction (as is done with the historical 
map) could by done by easily filtering the URL parts. (With the 
historical map, only some origins like wikimedia and flickr are used to 
create thumbnails - for copyright reasons).

Something I still miss in the image discussion (especially int the 
context of the historical map) is a possibility to distinguish between 
an actual image (present time) and an image of former times. Of course, 
a lifecycle relation would solve this problem but we all know it is not 
yet widely adopted, alas.

So I suggest something like:

image=<url>                            image with no timestamp
image:present=<url>             recent image (ok, that's also rather 
fuzzy but should be sufficient as it will be used only when another 
older image be given, too)
image:ancient=<url>              ancient image of the object
image:<date>=<url>              dated image, where date format undergoes 
the rules described e.g. here: 
http://wiki.openstreetmap.org/wiki/Key:start_date
                                                   (only such date 
formats without blanks should be used - maybe we need a rework of the 
date format rules)

Regards,
Zecke
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