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Board » Technical Support » Sailplanner makes me confused

Posted by
Sambal


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2008-06-05 22:57:47
2009-03-18 20:20:08 - Sailplanner makes me confused
When I choose different resolution in Sailplanner, I got very different routes! Why is that?
I give you 5 screendumps, one for each resolution. They don´t make sense for me.

Time: 2009-03-18 19.30 UTC
Pos: Lat S37"24.00' Lon W047"54.00'
Direction: Rio de Janeiro
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Posted by
jakob


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2007-09-04 10:05:30
2009-03-18 22:10:37 - Re: Sailplanner makes me confused
Imagine that the wind is totally constant and that your target is somewhere downwind. What is the best route? The answer is that there are infinitely many best routes! So from your screenshot it is quite hard to tell what is causing the behavior without scrolling the time-slider but you should most likely start off a little to the east, don´t you think?!

/Jakob
...one of the guys behind the game...
Posted by
Sambal


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2008-06-05 22:57:47
2009-03-19 21:11:09 - Re: Sailplanner makes me confused
Jakob, theese screendumps are made within 2 minutes. Start and end of route is exactely the same.

If the Low resolution route suggests 15 changes of my course, why is the Medium high resolution route suggesting only 2 changes? And with a very different route?

Wouldn´t it be the other way? The higher resolution - the more changes of the course in the route? And more like each other than in this example?

I have recognized this several times. I think something must be wrong?
Posted by
jakob


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2007-09-04 10:05:30
2009-03-19 21:59:30 - Re: Sailplanner makes me confused
There is nothing restraining the router from making very many course changes, course changes are simply not "punished" in the calculations. So far I see nothing strange in your plots.
...one of the guys behind the game...

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