- PIBHMC Home
- Organization
- Benthic Habitat Mapping
- DATA BY LOCATION
- Main Hawaiian Islands
- Northwest Hawaiian Islands
- American Samoa
- Pacific Remote Island Area
- Cruise Catalog
- Documentation
- Contact Us
View All Maps
Benthic Habitat Data
Bathymetry
Zipped data files contain 1) grid data file (GMT or ASCII), 2) high-res JPG of image, and 3) explanatory metadata text file (identical to linked file listed below).
20m grid data
- NetCDF/GMT:
Metadata text • Zipped data - Arc ASCII:
Metadata text • Zipped data
5m grid data
- NetCDF/GMT:
Metadata text • Zipped data - Arc ASCII:
Metadata text • Zipped data
Merged Multibeam Bathymetry, IKONOS Derived Depths
- View Metadata:
- Zipped Data:Arc ASCII
Backscatter Imagery
Optical Validation
Geomorphology
Zipped data files contain 1) Arc ASCII file, 2) layer (.lyr) file for symbology, 3) high-res JPG of image, and 4) explanatory metadata text file (identical to linked file listed below).
20m grid data files
- Slope Arc ASCII:
Metadata text • Zipped data - Rugosity Arc ASCII:
Metadata text • Zipped data - BPI Structures Arc ASCII:
Metadata text • Zipped data - BPI Zones Arc ASCII:
Metadata text • Zipped data
Home > DATA SETS: Pacific Remote Island Area (PRIA) > Johnston Island> Geomorphology
PRIA: Johnston Atoll
[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]
Gridded Geomorphology
Download 20 meter grid::
Slope, Rugosity, BPI Structures, BPI Zones
Click here for a Discussion of Geomorphological Layers
Zipped data files contain 1) Arc ASCII file, 2) layer (.lyr) file for symbology, 3) high-res JPG of image, and 4) explanatory metadata text file (identical to linked file listed below).
Slope - 20 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.
Download this image as a high-res JPG or PDF
Slope data files
- Arc ASCII: Metadata text • Zipped data
Top of the page
Rugosity - 20 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)
Download this image as a high-res JPG or PDF
Rugosity data files
- Arc ASCII: Metadata text • Zipped data
Top of the page
BPI Structures - 20 meter grid
BPI Structures: Derived from two scales (20 & 250) 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).
|
A visual description of BPI Structure classes (Click image for larger view.) |
Download this image as a high-res JPG or PDF
BPI Structures data files
- Arc ASCII: Metadata text • Zipped data
Top of the page
BPI Zones - 20 meter grid
BPI Zones: Derived from a broad scale (250) BPI grid and slope. Two ranges of slope defined flats and slopes: x < 5 and 5 < x < 70.
Download this image as a high-res JPG or PDF
BPI Zones data files
- Arc ASCII: Metadata text • Zipped data
Top of the page
SOEST Home | Search | Directory | News | Academic Departments | Research at the School | Education | Resources |
Public Outreach | The School | Site Map | Contact SOEST| Comments or questions about this page go to pibhmc@soest.hawaii.edu. Last update Monday Nov. 14th, 2011.