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
Plumas National Forest and it's roads
- 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
##Once you get to a place, walking there is not easy either
- 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
###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
## Error: cannot allocate vector of size 266.9 Mb
