Download - Modeling ROS
Modeling ROS
A new look at an old problem
primitive
Semi-primtiveNon-motorized
Semi-primitive, motorized
Roaded Natural
Rural
Urban
ROS Settings
Basic ROS Distances
The fine print
Steep Terrain is harder to cross
3 miles
PR
½ mileSPNM
½ mile
RNRN
SPM
SPM
SPM
SPM
SPM
SPM(cut off bySteep Slopes)
Very Steep Slopes(narrows zones)
Flat ground(widen zones)
SPNM(access by trails)
PR
RN
RN
SPM
RN
RN
R
R
R
CongestedAreas
Modeling using Terrain
Clean up slivers
Add Attribute Fields
Assign ROS class based on size and zone
Final Clean Up
Putting it into Perspective
Summary
• Use Travel Management work to determine 2 road classes and trails.
• Using slope as impedance, calculate costdistance for good roads and all roads
• Reclassify costdistance into zones- intersection of two maps determines SPM
• Use focal function to determine road density.• Reclass density to determine R and U classes
Uses of ROS
• Compare effects of alternatives on Recreation setting
• Provide input to forest plans and revision