The DBPedia dataset "Images" has mappings from wikipedia ids to the
actual URL where the image can be downloaded.

Example:
<http://dbpedia.org/resource/%22Buzz%21%21%22_The_Movie>
<http://xmlns.com/foaf/0.1/depiction>
<http://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/z_BTM.jpg/200px-z_BTM.jpg>
.


However, many of the images have moved around and no longer exist.
What is the proper way if I want to download (and locally) cache all
(or at least a large number of) images from Wikipedia?

I have downloaded the full Wikipedia dump
"enwiki-20080103-pages-articles.xml.bz2" which do contain all image
names (for example, [[Image:Anarchy-symbol.svg|....]]").
But that piece does not give me the actual URL to the image?
What is the proper way to download all images? I could always call
"http://en.wikipedia.org/wiki/Image:Anarchy-symbol.svg"; for each image
and from there get the actual URL (which in this case happens to be
"http://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Anarchy-symbol.svg/256px-Anarchy-symbol.svg.png";)
and download that image from the URL.

This would require two calls to Wikipedia for each image I want to
download (one to get the URL, and another to get the image). Is there
anyway I can do this without putting such stress to their servers?
It would be good if at least there was a way to get all URLs
automatically so I do not have to do two calls but only one call per
image.

I have by the way downloaded the "enwiki-20080103-image.sql.gz"
dataset, but it only contains meta data about the images, not the URLs
so I can fetch them.
Since DBPedias "Image" dataset contains all URLs I assume there is
someway to obtain all the URLs in a batch. Or has the DBPedia team
also fetched the URLs by doing one call per image to
"http://en.wikipedia.org/wiki/Image:XXXXXX";?


Thanks
/Omid

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