Template:Directional Roughness

Directional Roughness

The Landuse Raster to Directional Roughness tool converts a landuse raster (NLCD, C-CAP, etc.) to a coastal directional roughness dataset. The tool has the following options:

• Input landuse raster – Select which landuse raster in the project will be the input.
• Method – Select which method will be used for computation of the conversion.
  • "Linear" – Computations will convert in a linear fashion.
  • "Sector" – Computations will convert through the use of sectors.
• Total distance – Sets the total distance of the directional roughness, measured in the units that the project is set in.
• Weighted distance – Sets the weighted distance of the directional roughness, measured in the units that the project is set in.
• Target grid – Select which grid will be the target.
• Landuse raster type – Select which type the landuse raster is.
  • "NLCD" – Sets the landuse raster type to National Land Cover Dataset (NLCD). A mapping table file for NLCD can be found here and down below.
  • "C-CAP" – Sets the landuse raster type to Coastal Change Analysis Program (C-CAP). A mapping table file for C-CAP can be found here and down below.
  • "Other" – Sets the landuse raster type to be set by the user. This selection adds an option to the dialog.
    • Landuse to directional roughness mapping table – The Select File... button allows a table file to be selected. Its full file name will appear on the box to its right.
• Default wind reduction value – Set the default level of wind reduction for the new dataset.
• Output wind reduction dataset – Enter the name for the new wind reduction dataset

Directional Roughness NLCD Mapping Table

Directional Roughness NLCD Values

Code	Description	Roughness
0	Background	0
1	Unclassified	0
11	Open Water	0.001
12	Perennial Ice/Snow	0.012
21	Developed Open Space	0.1
22	Developed Low Intensity	0.3
23	Developed Medium Intensity	0.4
24	Developed High Intensity	0.55
31	Barren Land (Rock/Sand/Clay)	0.04
41	Deciduous Forest	0.65
42	Evergreen Forest	0.72
43	Mixed Forest	0.71
51	Dwarf Scrub	0.1
52	Shrub/Scrub	0.12
71	Grassland/Herbaceous	0.04
72	Sedge/Herbaceous	0.03
73	Lichens	0.025
74	Moss	0.02
81	Pasture/Hay	0.06
82	Cultivated Crops	0.06
90	Woody Wetlands	0.55
95	Emergent Herbaceous Wetlands	0.11
91	Palustrine Forested Wetland	0.55
92	Palustrine Scrub/Shrub Wetland	0.12
93	Estuarine Forested Wetland	0.55
94	Estuarine Scrub/Shrub Wetland	0.12
96	Palustrine Emergent Wetland (Persistent)	0.11
97	Estuarine Emergent Wetland	0.11
98	Palustrine Aquatic Bed	0.03
99	Estuarine Aquatic Bed	0.03

Directional Roughness CCAP Mapping Table

Directional Roughness CCAP Values

Code	Description	Roughness
0	Background	0
1	Unclassified	0
2	Developed High Intensity	0.55
3	Developed Medium Intensity	0.4
4	Developed Low Intensity	0.3
5	Developed Open Space	0.1
6	Cultivated Crops	0.06
7	Pasture/Hay	0.06
8	Grassland/Herbaceous	0.04
9	Deciduous Forest	0.65
10	Evergreen Forest	0.72
11	Mixed Forest	0.71
12	Scrub/Shrub	0.12
13	Palustrine Forested Wetland	0.55
14	Palustrine Scrub/Shrub Wetland	0.12
15	Palustrine Emergent Wetland (Persistent)	0.11
16	Estuarine Forested Wetland	0.55
17	Estuarine Scrub/Shrub Wetland	0.12
18	Estuarine Emergent Wetland	0.11
19	Unconsolidated Shore	0.03
20	Barren Land	0.04
21	Open Water	0.001
22	Palustrine Aquatic Bed	0.03
23	Estuarine Aquatic Bed	0.03
24	Perennial Ice/Snow	0.012
25	Tundra	0.03