Farallon de Medinilla: Geomorphology

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]
Slope, Rugosity, BPI Structures, BPI Zones

Click here for a Discussion of Geomorphological Layers

Slope – 5 meter grid

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.

Image map of Guam slope.

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Slope data files
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Rugosity – 5 meter grid

Rugosity: Cell values reflect the surface area and (surface area) / (planimetric area) ratio for the area contained within that cell’s boundaries. They provide indices of topographic roughness and convolutedness. (Jenness 2003)

Image map of Guam rugosity.

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Rugosity data files
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BPI Structures – 5 meter grid

BPI Structures: Derived from two scales (25 & 200) of BPI; slope; and depth. Three ranges of slope defined flats, slopes and near vertical: x < 5; 5 < x < 70. Depth alone, in this case, is added only to separate flat structures into shelf (<30 m) and broad flat (>30 m) environments (depths based on SCUBA limits).

Figure giving visual description of BPI Structure classes.
A visual description of BPI Structure classes (Click image for larger view.)

Image map of guam BPI Structures.

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BPI Structures data files
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BPI Zones – 5 meter grid

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.

Image map of guam BPI Zones.

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BPI Zones data files
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