- Over 2000 miles of roads!!!
- Easy to get lost (not all roads have a sign on it)
- Roads of very different quality, from highways to very bad roads
Plan your survey in the Plumas National Forest
How to work in Plumas and not get lost
Derek Corcoran
Post Doctoral Researcher
Plumas National Forest and it's roads
- Plumas is a Mountainous National Forest, walking on a straigh line is probably not a good idea
- It is a lot faster and easier to use the path of the least slope
How do we plan the best route? Using velocity of movement to calculate permeability
Driving speed
- On Highways we calculate a speed of 22.352 mts/seg
- On local roads we calculate a speed of 17.8816 mts/seg
- On collector roads we calculate a speed of
Walking speed
\[ Speed = exp(-3.5 * slope + 0.05))\]
Tobler W. 1993. Three Presentations on Geographical Analysis and Modeling.
With the speed layer we make a transition layer raster
This will be used by the gdistance package to calculate least cost trayectory
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