Here is the Rosaryville '08, M21 map, and here are my routes.
Brand new map, good courses. This was a LIDAR map,
I'm not so sure about the contours, but what do I
know? Everything just seemed way bigger than mapped;
hills, slopes, and other contour features. That was
my problem on #9, it is supposedly only a line up
but was way up there. A couple of other times I
would see this huge, deep slope, and it was just
a line of the map. Contours seemed lazier on the
map than in the field, in general. Perhaps some
contour corrections or form lines are needed, I
Perhaps LIDAR is perfect and by hand base
creation isn't. I don't say that facetiously, when
I first started and was told maps were 5m contours,
I felt that absurd, they seemed way closer than that.
Whatever, it seemed different, perhaps it was because
I had in my mind the big deal being made of it.
Another thing that was a problem was confusing
gullies with contour lines. Three times I got
trapped in a gully that I did not see. Others
reported the same thing. Its odd that I wonder
why that has never happened before; a long gully
looks just like an index contour, especially close
to other lines in the bottom of a deep, narrow
drainage, it just seemed natural. I guess the only
thing that can be done is to use parallel earth
bank features, if they fit. Or maybe I should just
In any case, it is nice to enjoy orienteering again.
It really was a very fine event all around, my
comments about the map more speculative than having
any bearing on my enjoyment of it.