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ROS

ROS. Step by Step. Getting Started. ROS determination is based on the transportation system and topography (specifically, slope). Step 1. Classify routes as improved, primitive or non-motorized. Better than Primitive Routes. Primitive Motorized Routes. Non-motorized Routes. Step 1.

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ROS

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  1. ROS Step by Step

  2. Getting Started • ROS determination is based on the transportation system and topography (specifically, slope)

  3. Step 1 • Classify routes as improved, primitive or non-motorized. Better than Primitive Routes Primitive Motorized Routes Non-motorized Routes

  4. Step 1 • To reduce computational time, clip routes to those within 3 miles of project area.

  5. Step 2 • Prepare a slope raster (percent) and 2 route rasters- improved roads and, all motorized routes.

  6. Step 2 (continued) • Prepare a cost raster for travel from primitive motorized routes • (slope / 3).

  7. Step 2 (continued) • Prepare a second cost raster for travel from improved routes. • (slope / 3)

  8. Step 3 • Compute costdistance raster for improved roads.

  9. Step 3 (cont) • Compute a second costdistance raster for all motorized routes.

  10. Step 4 • Reclassify the costdistance raster for improved roads into preliminary zones.

  11. Step 4 (cont) • Reclassify the costdistance raster for all motorized routes into preliminary zones.

  12. Step 4 (cont) • Combine the reclassified maps. • Areas of difference define SPM and compromised SPNM.

  13. Step 5 • Using all motorized routes, determine route density using focal function.

  14. Step 5 (cont) rural • Reclassify the route density into Rural, Urban and Other classes. urban

  15. Step 6 • Combine the density classes with the cost mapping. • Assign draft ROS classes.

  16. Step 7 • Develop combined PR / SPNM polygons. • PR and SPNM can be undersized when there are adjoining areas.

  17. Step 7 (cont) • Develop combined SPM / SPNM polygons. • SPM can be undersized when there are adjoining SPNM areas.

  18. Step 7 (cont) • Add the expanded area values to the draft ROS zones.

  19. Step 8 • Make final designations based on sizes and adjacent areas.

  20. Classify RN. • Classify U & R. • Classify SPM > 2500 • Classify SPM < 2500 • Reclassify SPM < 400 as RN

  21. Classify SPNM > 2500 • Classify SPNM < 2500 • Reclassify SPNM < 2500 to SPM • Reclassify SPNM < 2500 to RN • Reclassify SPNM < 400 to RN

  22. Classify PR > 5000 • Classify PR < 5000 adjacent to SPNM • Reclassify PR < 1000 adjacent to SPNM to SPNM • Reclassify PR < 1000 not adjacent to SPNM to RN

  23. Step 9 • Dissolve on ROS value • Clip to Boundary • Review Results

  24. Step-by-Step

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