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→GPS File for Trekking
The "X" at the end means that this is an optional side trip. In this example its the optional climb to the summit of the volcano Descabezado Grande.
===Distances, Ascent, Descent and Walking Time===
This trail description contains plenty of numbers for distances, altitudes, ascents, descents and even walking times. All these numbers are based on the "cleaned" GPS track without our occasional seek and search detours and altitudes provided by the digital map.
These numbers are therefore also free of accumulated "GPS noise" and "barometric altimeter noise" that increase the measured distances, ascents and descents when recording the track by GPS while hiking. So, don't be surprised if your GPS will always indicate longer distances, more ascents and decents even if you strictly follow the trail. A deviation of 10% is typical.
The walking times provided here are estimated moving times without any breaks and rests. When evalutating our GPS records I was surprised that we did not move nearly one third of the time between leaving the camp in the morning and stopping again in the evening. It did not appear to us that we make such long breaks but the GPS record does not lie. So a walking time of 6 hours means more or less a 9 hour hiking day adding normal breaks to to eat, take pictures and verify navigation.
The estimated walking time is calculated based on distances, ascents and descents. I opted to use such a calculation because it removes the unnecessary seek and search detours, and the factor of having a good day or a bad day. I developed and verified this calculation method based on all our GPS records and was surprised myself that such a simplified calculation provides quite reliable estimates. The calculated times correspond closely with our actual walking time. If applied to your actual records the average deviation per day is 15 minutes and never more than 50 minutes.
The used calculation factors are (they provided the smallest average deviation to our actual walking time):
* 12:23 minutes per km (corresponds with 4.8 km/h on a level trail)
* 11:26 minutes per 100 m ascent
* 3:44 minutes per 100 m descent
These factor resulted in the minimal overall error.
==Verifications, Additional Options and Extensions==
