Discussion: sprint tunnel mapping

Is this the approved way to map a tunnel, http://news.worldofo.com/wp-content/uploads/2014/0...
with a gap in the uncrossable wall? I thought the wall, in general, was supposed to remain solid with a crossing point symbol used.

Or if they only want to map the "main running level", maybe make the tunnel walls solid black.

I understand what the mapper is doing, and sitting down looking at the map it makes a lot of sense... but...

I can see an Option D in there that is potentially shorter than all three routes shown. Does that make me a good orienteer?

Only if Option D works on the ground as well as in theory - which it probably doesn't.
It makes you good at Catching Features...

This is where I've started using the bridge symbol to show entrances to tunnels. It shows that you can cross under it like a bridge but also shows that you can't cross from the upper level to the outside.

I know it's not strictly ISSOM but it seems to me to be a sensible extension of the symbol.

You're right. I had another look at Option D and I think it fails due to the aforementioned mapping of the runnable level.

You're an awesome orienteer, tRicky. ♥

ISSOM
518.1 Underpass or tunnel
If underpasses or tunnels etc. are to be used in a competition, they shall be
emphasized with the symbol crossing point(708) or crossing section (708.1)

The fact that ^that is ignored so often makes me feel like course planners are trying to make sprint an eyesight competition rather than an orienteering one.

I think tRicky just demonstrated why this is not a good way of mapping the tunnel.

They ran the other way through the tunnel earlier in he course, so they knew what to expect. I think the only fair way to map it for this routechoice is as an underpass (grey = main running level) with the level above (not used on any sane route choice) out of bounds.

I 'think' the men ran it twice and the women only once.

It looks as though the tunnel should be mapped as underpass and the rest as building if it isn't possible to go over it.