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Re: equivalent distance or height into miles....

Probably basic Pythagoras & Trigonometry.

Or, it may be Naismith's Rule to claculate the time.
Then, if that time was on the flat what would the mileage be.

Re: equivalent distance or height into miles....

HP, I don't believe that the mapping software does do that, which is why I really don't think it worth the cost - what are computers for if they don't do the nasty sums?

If the pen and paper has to come out i might as well buy teh paper!

Re: equivalent distance or height into miles....

on my Anquet mapping it shows the distance from pen y fan cairn to crybin cairn as just under a mile,,,,i can tell you its a damn sight further on the ground,,,,actual distance walked can be a lot further than you think,,and could cause problems of exhaustion at the end of a long day,,,,or running out of light,,,pays to study your map!!

Re: equivalent distance or height into miles....

Mapping Software uses the traditional tried & tested method of Naismiths rule to calculate journey time.
e.g. The "flat" mileage distance for given miles per hour hour, then just add an extra time per 100m of height gain.

You could, as I said, then work back and use the final time to find out how far you would have travelled in a straight line on the flat in the same time.

Mapping software does not provide a true distance.

That can be got by knowing horizontal map distance, height gained, and then apply basic right angle triangle Pythagoras to find the length travelled up a slope.
Or... height gain, angle of elevation, and apply basic Trigonometry.
(A mirror sighting compass, or a Theodolite, can do this... you still need to do the maths though!) .

Re: equivalent distance or height into miles....

hey BF,we'd all be going round like the two blokes in the film"the man who went up a hill,but came down a mountain"!!!!