If you were to upload an image to FB then you'd be breaching the CC license as the T&C of FB arent compatable.

But if you are posting a link to the image on Commons then the FB T&C on the image arent applicable, but when posting the link the Author and copyright details need to added to comply with the CC licensing the same as would be expected if an image was used in a blog or another web page.

On 22 March 2012 07:28, Andrew Gray <andrew.gray@dunelm.org.uk> wrote:
On 21 March 2012 23:07, Alhen <alhen.wiki@gmail.com> wrote:
> Will it be terribly bad to post Commons pictures on Facebook? User
> jduranboger had the idea to promote Wikimedia Bolivia by posting a
> different picture about Bolivia every week. Take a look at it here[1].
>
> So, my question is if by doing this we fulfill the terms of cc-by-sa
> 3.0 or is there a way to post facebook pages providing another way to
> mention the author and the terms of the licence.

Neat idea!

I am no expert, but the current system you use of listing the author
and license in the "image description" field, with links to Commons,
should be fine. Readers do have to click through to see the
author/license - on the other hand, they have to do this on Wikimedia
projects as well, so we can't really complain!

The only catch might be Facebook itself, which has in the TOS that:

"For content that is covered by intellectual property rights, like
photos and videos (IP content), you specifically give us the following
permission, subject to your privacy and application settings: you
grant us a non-exclusive, transferable, sub-licensable, royalty-free,
worldwide license to use any IP content that you post on or in
connection with Facebook (IP License)."

I am not sure if *that* is CC-compatible...

--
- Andrew Gray
  andrew.gray@dunelm.org.uk

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