When is a rose not a rose.....!

When it's a Wind Rose. I walk past this sculpture near the ocean at least twice a week and for the first time yesterday I actually 'looked' at it and wondered a) what it was called and b) who created it! The words read: 'THIS WIND ROSE REPRESENTS AVERAGE WIND VELOCITY RECORDED DAILY AT 3PM' and around the base are the compass points N, NE, E, SE, S, SW, N, NW.   I'm guessing that the positioning and the curve and size of the centre opening of the sculpture is vitally important, but even reading the working description in the above link it's as clear as 'mud' to me (come on, it's nothing at all to do with being blonde haha!). I was wondering if anyone has seen a Wind Rose (not necessarily in  this particular design) and can perhaps in 'non technical' terms make it all a little clearer! I hope you have a less puzzling day than mine was trying to figure this out.....!