The man gets little mention
look at his epic jump
http://www.youtube.com/watch?v=W3Zh5Jvojdo
now, it was into a wind
edwards wr was with a wind
my guestimate is that if you convert jumps with/into winds with 50m calc on
http://myweb.lmu.edu/jmureika/track/wind/index.html
use 50m function for run up ( it's about that long for jumps ) with say 6.0s, to get wind/altitude benefit/detriment there & then multiply again as wind still acts thru 3 jump phase
3 best reckoned jumps in history
18.43 +2.4 Jonathan Edwards GBR 10.05.66 1 Villeneuve d'Ascq 25.06.1995
18.29 +1.3 Jonathan Edwards GBR 10.05.66 1 Göteborg 07.08.1995
18.09 -0.4 Kenny Harrison USA 13.02.65 1 Atlanta 27.07.1996
give us some "basic" figures ( ignoring cm behind the board - unless someone knows them ! )