Rugosity was calculated using the Rugosity Builder tool within the Benthic Terrain Modeler (<http://www.csc.noaa.gov/digitalcoast/tools/btm/>). References: Jenness, J. 2003. Grid surface areas: Surface area and ratios from elevation grids [Electronic manual]. Jenness Enterprises: ArcView Extensions. <http://www.jennessent.com/arcview/arcview_extensions.htm>
Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information gal_5m_rug Raster_Object_Type Grid Cell Row_Count 1869 Column_Count 1623 Vertical_Count 1 Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information sgal_5m_rug Raster_Object_Type Grid Cell Row_Count 905 Column_Count 1293 Vertical_Count 1 Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information ele_5m_rug Raster_Object_Type Grid Cell Row_Count 357 Column_Count 307 Vertical_Count 1
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), 20121130, Rugosity grid derived from gridded bathymetry of of Galvez Bank, South Galvez Bank, and 11-Mile Reef, Territory of Guam, USA..
Planar coordinates are encoded using Row and Column
Abscissae (x-coordinates) are specified to the nearest 5
Ordinates (y-coordinates) are specified to the nearest 5
Planar coordinates are specified in meters
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
NOAA PIFS, CRED, PIBHMC, JIMAR, and SOEST
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The data were derived in support of NOAA Coral Reef Conservation Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems. This data set specifically addresses Objective 1 and 4: to develop high-resolution benthic maps and to characterize priority deep water reefs and associated habitats. This derivative of bathymetry provides a GIS layer that may be used for benthic and essential fish habitat characterization, and for the study of geologic features. By combining the dataset with bathymetry, backscatter, other derivatives, and in situ data, they collectively compose benthic habitat maps which are designed to be used to understand and predict moderate depth (~20m – 150m) benthic habitats for different organisms that inhabit coral reef ecosystems.
Data are collected for resource management and research purposes and are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data.
Horizontal positioning system: GPS C/A Horizontal position accuracy: 25 meters
Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth
These data are believed to be logically consistent though no tests were performed
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- These data are not to be used for navigation purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center (PIFSC) Coral Reef Ecosystem Division (CRED) and the Pacific Islands Benthic Habitat Mapping Center, and the Joint Institute for Marine and Atmospheric Research (JIMAR) and School of Ocean and Earth Science and Technology (SOEST), University of Hawaii as the sources of this information.
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These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
|Data format:||Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster). in format Arc ASCII|
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