1999 RoxAnn Data Points from Apalachicola Bay, Florida

The Apalachicola Bay National Estuarine Research Reserve and the NOAA Office for Coastal Management worked together to map benthic habitats within Apalachicola Bay, Florida. The bay and the lower portions of four distributaries were surveyed on 11-22 October 1999 using three benthic sampling techniques. This data set represents the information gathered from a RoxAnn acoustic sensor. The instrument was used to characterize bottom type by extracting data on bottom roughness and bottom hardness from the primary and secondary sounder echoes. The data is classified on-the-fly, using the Sediment Profile Images and grab samples collected for field validation, and subject to a post-processing classification. The RoxAnn data points were exported into a geographic information system (GIS) and post-processed to remove unreliable data points and re-classified. This data set is comprised of the cleaned, attributed point data. The attributes include location, date, time, depth, field derived classification, and the classification derived from post-processing the data.

Original contact information:

Contact Org: NOAA Office for Coastal Management

Phone: 843-740-1202

Email: coastal.info@noaa.gov

This data set was collected to supplement the SPI and grab sample data by providing information on the bottom between the SPI and grab stations.

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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.

Single beam acoustic data points (RoxAnn) collected in Apalachicola Bay, Florida on October 11 to 22, 1999.For information about obtaining these data, please visit the project home page at http://www.coast.noaa.gov/benthic/data/gulf/apa.htm;

None

It is the responsibility of the user to determine the appropriate use of the data product. The depth data has not been corrected and should not be used for navigation.

ArcView version 3.3 shapefile format

This data is accurate to field conditions in October 1999. The depth points have not been corrected for tide and wind variables.

Stations were located in the field using a differential Global Positioning System (GPS). Not verified.

Not applicable

Data is complete.

The data were collected with the RoxAnn acoustic sensor in a geographic projection. The field database was exported from RoxMap software as a text file. Unreliable data points (i.e. data with impossible bathymetry) were deleted. Using ArcInfo, the point data were converted to both a shapefile and coverage, and reprojected to UTM Zone 17 WGS 84 Meters.