Occassional thoughts about orienteering

Monday, December 11, 2006

Another sprint route choice


Here is another sprint O' route choice test I ran a few weeks ago. Same questions as yesterday:

Which route is fastest?

How much slower are the other routes?

When I looked at these three options, I picked b as the fastest, followed by a and c. When I timed the routes, I ran all three within 2 seconds. I was fastest, by just 2 seconds, on a. My times for b and c were equal. For such a rough test a difference of 2 seconds isn't enough to conclude that a was best. I figure that all three routes are equal. A good case can be made that a is risky, because the little gap just about at the "a" might have turned out to be impassible.

Back to okansas.blogspot.com.

Labels: ,

posted by Michael | 6:51 PM


Looking at the maps on the weekend, I had D chosen as my route - NW out of the control past the building to the trail, then towards A.
This one surprises me. I ran C, but that was before I realized that the flag was on the west side of the library entrance. I figured A would have been faster by a lot more. I also like mrpither's D choice, too.
Its confusing to pick the fastest way.
I am quite sure (D) is faster than (A) at least. So if the other three are equivalent, (D) must be the fastest. I would have thought (A), (B) and (C) to be about 5-10 seconds slower.
I would have run D.
D for sure
I didn't test D when I tested routes. I planned to, but I was running a few minutes late and had to meet Mary and the start/finish.

Consider the gap near the "a".

I don't consider this risky if you are running from S->N. You take a quick look on the approach, and if it seems iffy you run the extra 20 meters to the stairs without breaking stride. Cost is 4-5 seconds.

It's a lot riskier if you are going N->S. Now you commit to the gap earlier. If it doesn't work, you lose a couple seconds trying to find the gap. Then you have to run an extra 40 meters around the wall with 2 direction reversals that cost speed. Could cost up to 15 seconds.

My evaluation. I don't even consider the gap if I'm going N->S, but going S->N I keep my eye open for an opportunity to shave seconds.
My first choice is a small variation of MrPither´s D route. I think I would have gone straight down to the road/bike-path and then to 'a'. Possibly using the stairs - with the same thoughts as blegg - if the 'gap' looked risky.
This is really a 'micro route choice' leg that may not differ more than a few seconds but a sprint course offers a lot of those. One of the most important things in sprint is consistent orienteering through fast (and correct) decisions and I tend to try to simplify a lot even if that means that I sometimes run a bit longer. I´m not very succesful, so that may be the wrong tactics...
Post a Comment
March 2002April 2002May 2002June 2002July 2002August 2002September 2002October 2002November 2002December 2002January 2003February 2003March 2003April 2003May 2003June 2003July 2003August 2003September 2003October 2003November 2003December 2003January 2004February 2004March 2004April 2004May 2004June 2004July 2004August 2004September 2004October 2004November 2004December 2004January 2005February 2005March 2005April 2005May 2005June 2005July 2005August 2005September 2005October 2005November 2005December 2005January 2006February 2006March 2006April 2006May 2006June 2006July 2006August 2006September 2006October 2006November 2006December 2006January 2007February 2007March 2007April 2007May 2007June 2007July 2007August 2007September 2007October 2007November 2007December 2007January 2008February 2008March 2008April 2008May 2008June 2008July 2008August 2008September 2008October 2008November 2008December 2008January 2009February 2009March 2009April 2009May 2009June 2009July 2009August 2009September 2009October 2009November 2009December 2009January 2010February 2010March 2010April 2010May 2010June 2010July 2010August 2010September 2010October 2010November 2010December 2010January 2011February 2011March 2011April 2011May 2011June 2011July 2011August 2011September 2011October 2011November 2011December 2011January 2012February 2012March 2012April 2012May 2012June 2012July 2012August 2012September 2012October 2012November 2012December 2012January 2013March 2013April 2013May 2013July 2013September 2013