Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC), 20050801, Benthic Habitat Mapping - Dry Tortugas RoxAnn Acoustic Sensor Data Points: NOAA's Ocean Service, Coastal Services Center (CSC), Charleston, SC.This is part of the following larger work.Online Links:
- <http://www.csc.noaa.gov/digitalcoast/data/benthicsba>
- <ftp://ftp.csc.noaa.gov/pub/benthic/Single_Beam_Acoustic_Data/FL_DryTortugas_rox.zip>
- <http://www.csc.noaa.gov/digitalcoast/data/benthicsba/download>
- <http://www.csc.noaa.gov/>
Laboratory, NOAA Beaufort , 20040401, Biogeographic Analysis of the Tortugas Ecological Reserve Examining the Refuge Effect Following Reserve Establishment: Marine Sanctuaries Division, Silver Spring, MD.
This is a Point data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using Row and Column
Abscissae (x-coordinates) are specified to the nearest 1
Ordinates (y-coordinates) are specified to the nearest 1
Planar coordinates are specified in unknown. Abscissa/Ordinate Resolution values were unreported and populated with one to satisfy validation requirements
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is GRS 80.
The semi-major axis of the ellipsoid used is 6378137.0000000.
The flattening of the ellipsoid used is 1/298.26.
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 30 |
| Range of values | |
|---|---|
| Minimum: | 24.52 |
| Maximum: | 24.7381 |
| Range of values | |
|---|---|
| Minimum: | -82.9984 |
| Maximum: | -82.7639 |
| Range of values | |
|---|---|
| Minimum: | -35.55 |
| Maximum: | -5.59 |
| Range of values | |
|---|---|
| Minimum: | 0.029 |
| Maximum: | 2.64 |
| Range of values | |
|---|---|
| Minimum: | 0.02 |
| Maximum: | 1.289 |
Eastern Daylight Time
Date
| Range of values | |
|---|---|
| Minimum: | 3 |
| Maximum: | 342 |
SCHEME Modifier
Habitat Description
(843) 740-1264 (voice)
(843) 740-1289 (FAX)
The single-beam surveys were part of a larger biogeographic characterization effort intended to characterize benthic habitats, ocean circulation patterns, in the newly established Tortugas Ecological Reserve. The goal of the project was to establish a baseline of environmental conditions and processes that could be compared to future surveys. This would support evaluations of various reserve managment strategies.
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC), 20050801, Dry Tortugas RoxAnn Points: NOAA's Ocean Service, Coastal Services Center (CSC), Charleston, SC.This is part of the following larger work.Online Links:
Laboratory, NOAA Beaufort , 20040401, Biogeographic Analysis of the Tortugas Ecological Reserve Examining the Refuge Effect Following Reserve Establishment: NOAA Marine Sanctuaries Division, Silver Spring, MD.
Person who carried out this activity:
(843) 740-1264 (voice)
(843) 740-1289 (FAX)
clearinghouse@noaa.gov
Person who carried out this activity:
(843) 740-1264 (voice)
(843) 740-1289 (FAX)
clearinghouse@noaa.gov
This data is accurate to field conditions in April 2001. The depth readings have not been corrected for tide stage or wind variables. A towed video system (mini-bat) was deployed behind the vessel where the acoustic transducer was deployed. This provided real-time ground-truth to the acoustic signals. As habitat boundaries were crossed, the RoxAnn acoustic signature box was updated and checked. In addition dive observations were made along the transects to verify the habitat classes.
The horizontal positional accuracy is based on the accuracy of the GPS used to generate the coordinate pair for each acoustic record. The GPS unit was a military grade receiver enabled to receive encrypted Y-code from the GPS satellites. his typically produces a spatial accuracy of 10 meters or less.
Depth value is in meters below transducer. No correction has been applied for wind or tide effects. No validation was performed on this data and no accuracy is implied.
The data is complete.
These data are believed to be logically consistent, though no tests have been performed. Point geometry is topologically clean.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Bathymetric data have not been corrected for tide and wind variables. Not for use in navigation.
(843) 740-1264 (voice)
(843 740-1289 (FAX)
clearinghouse@noaa.gov
Downloadable Data
Single-beam acoustic data points collected in the Dry Tortugas area of Florida. While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, NOAA will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
(843) 740-1210 (voice)
clearinghouse@noaa.gov