Benthic Habitat Mapping
DATA BY LOCATION
Zipped data files contain 1) Arc ASCII file, 2) layer (.lyr) file for symbology, 3) high-res JPG/PDF of image, and 4) explanatory metadata text file (identical to linked file listed below).
Substrate(Multibeam): Preliminary hard and soft bottom seafloor substrate map derived from an unsupervised classification of gridded backscatter and bathymetry derivatives of Ni’ihau Island, Hawaii, USA.
Substrate(World View-2): Preliminary hard and soft bottom seafloor substrate map derived from an supervised classification of bathymetry derived from multispectral World View-2 satellite imagery of Ni’ihau Island, Territory of Main Hawaiian Islands, USA
Slope: Cell values reflect the maximum rate of change (in degrees) in elevation between neighboring cells. Slope was derived with the ArcGIS Spatial Analyst extension.
Rugosity: Cell values reflect the surface area / planimetric area ratio for the area contained within that cell’s boundaries. They provide indices of topographic roughness and convolutedness. (Jenness 2003)
BPI Structures: Derived from two scales (30 & 200) of BPI; Slope; and depth. Three ranges of Slope defined flats, Slopes and near vertical: x < 5; 5 < x < 70.
|A visual description of BPI Structure classes (Click image for larger view.)|
BPI Zones: Derived from a broad scale (200) BPI grid and Slope. Two ranges of Slope defined flats and Slopes: x < 5 and 5 < x < 70.