Originally Posted by Meeker
How accurate are the Class, classifications on riverbrain? Under Class it will say III, then under rapids it will list IV's.
As accurate as the person who wrote it. Most well known runs usually have an established consensus that people are probably picking. If you see an obvious mistake you should just go in and modify it or at least put a note somewhere in the run description.
I always find run classes difficult to categorize without more granularity. On Riverbrain the class for the run gets entered 3x as the rating at minimum flow, average flow, and high flow. The range for the run displayed is min flow class rating - max flow class rating. I don't know that that's really the best thing to display. Seems to me like the overall class of the run reflects how most people run it.
The other quirk is that sometimes a run is mostly class III or IV with a couple hard Vs that are usually portaged. Hence the III(V) sort of rating. Some people always rate a run by the hardest drop, some would rather rate it by how it's typically run.
It would kind of be cool to have some discussion page on the runs where people could vote what the various categories should be. Kind of like rating a new climbing route at a gym where they tally up the ratings and pick the consensus. For now though, I think the concern is just getting as much data as possible entered and improving the accuracy later.