Data were also collected aboard the R/V AHI (Acoustic Habitat Investigator), a 25' survey launch owned and operated by the NOAA Pacific Islands Fisheries Science Center in Honolulu, HI. The R/V AHI's survey sensors include a 240 kHz RESON 8101-ER sonar providing bathymetry and imagery data, a TSS/Applanix POS/MV Model 320 which measures position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. Sensor configuration for the AHI for cruise AHI-06-01 is documented in the cruise/multibeam metadata file AHI0601_MB_Metadata.txt.
Miller, Joyce E. , and Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Scien, 200609, CRED Gridded 40m Bathymetry of Howland Island, Pacific Remote Island Areas, 2006.Online Links:
This is a Raster data set. It contains the following raster data types:
Planar coordinates are encoded using Row and Column
Abscissae (x-coordinates) are specified to the nearest 40
Ordinates (y-coordinates) are specified to the nearest 40
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.
Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and Pacific Islands Benthic Habitat Mapping Center, School of Ocean and Earth Science and Technology, University of Hawaii
808-956-5239 (voice)
joyce.miller@noaa.gov
The data were collected in support of Coral Reef Conservation Program goals to map all shallow (0-30 m) coral reefs in US Pacific waters and priority moderate (greater than 30 m) depth areas by 2009. The data are being used to provide bathymetric and backscatter data for previously unmapped areas; in support of ecosystem management requirements for benthic habitat mapping and location of Essential Fish Habitat; and to study the geologic features of the area.
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: Variable Raw sounding resolution: Variable Vertical accuracy of gridded product: Approximately 1 percent of water depth
Complete
Unspecified
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- These data are not to be used for navigation purposes. Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center and the Pacific Islands Benthic Habitat Mapping Center, School of Ocean and Earth Science and Technology, University of Hawaii as the sources of this information.
808-956-5239 (voice)
joyce.miller@noaa.gov
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. in format Arc ASCII |
|---|---|
| Network links: |
<http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_howland_bathy.htm#40meter> |
| Data format: | Binary netCDF Grid: This file is formatted as a 2-D binary netCDF grid file. This is the default grid file format used by GMT (Generic Mapping Tools), which created this file. More information can be located at <http://gmt.soest.hawaii.edu> and <http://unidata.ucar.edu/packages/netcdf/index.html> and in <http://www.ldeo.columbia.edu/res/pi/MB-System/formatdoc/gsf_spec.pdf> in format netCDF |
|---|---|
| Network links: |
<http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_howland_bathy.htm#40meter> |
808-956-5239 (voice)
joyce.miller@noaa.gov