1. I agree with Peter. There should be a reasonable limit for uploads; If there is not, each participant will be free to take dozens of photos of the same monument and upload them all to see if any of them is lucky!
The limit must be put with caution, however, as we won't like to lose valuable photos.
Here, in Colombia, we are considering to put a limit of 10 (maybe even 5) photos per monument per participant. That way, each participant still can send "unlimited" photos, but they would have to be of different monuments.

2. However, I think that even 4000 is a reasonable number for a jury IF some kind of supporting system (like the ones mentioned before) is used.

3. Be careful when involving "the community" for selecting, as we don't want to transform this into a popularity contest. Extreme case: people giving 10 to their friends photos, and 1 to everything else.

4. Comment: check Worth 1000's voting karma system: http://all.worth1000.com/faq#voting. Something like that could be implemented when designing open-voting systems.

Racso

2012/6/21 Peter Ekman <pdekman@gmail.com>
It seems to me that you can't possibly give a jury a 1,000 photos and expect them to come up with anything reasonable.  That type of system would also drive away quality jurors - the best jurors simply wouldn't have time for all that.  And if we're talking about 10,000 photos, it just gets worse.  There has to be some sort of pre-screening, whether we like it or not.

A couple of suggestions for pre-screening:
1.  Let the photographer decide which of his photos is best - say 1 for the entire contest or 1 for each day he/she uploads.
2. Have a contest each day, with a each photographer who uploaded that day nominating a single photo, and letting the community vote (I'd say +1 for each photo you like) then after a few days a selected screener from the community selects 2 or 3 photos from the group that has the highest score.  After 30 days, you'd have 60-90 photos that the jury can deal with, each photog would have had the chance to nominate his best photos (multiple times), the community would have their say, and the screeners would not have to deal with 1,000s of photos.

Pete Ekman
User:Smallbones