NOAA Office for Coastal Management RoxAnn Acoustic Sensor Benthic Habitat Data, Rehoboth Bay, Delaware, 2000 (NODC Accession 0089461)

During the spring of 1999, the Delaware Coastal Programs (DCP) identified the spatial extent of macroalgae in the shallow portions of Rehoboth Bay utilizing traditional photogrammetric methods. The DCP used true color aerial photographs, image processing software, a geographical information system (GIS), and a limited field survey to identify 1.88 square kilometers of macroalgae in all but the deepest parts of the bay. Turbid conditions prevented identification of the full extent of the vegetation. Although the 1999 effort was highly successful, it was clear that aerial photography could not penetrate to the deeper parts of the bay or where conditions were turbid.

For the 2000 effort, the DCP partnered with the National Oceanic and Atmospheric Administration (NOAA) Office for Coastal Management (formerly the Coastal Services Center). The Benthic Habitat Mapping project utilized a RoxAnn acoustic sensor to identify benthic cover in turbid areas of the bay June 12-16, 2000. The instrument was used to identify 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 a towed video camera for field validation, and subject to a post-processing classification. The unit collected data throughout the bay in areas greater than 1.4 meters in depth and serves as a powerful complement to the aerial photography. 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. This system is fully described in Development of a System for Classification of Habitats in Estuarine and Marine Environments (SCHEME) for Florida, Report to U.S. EPA - Gulf of Mexico Program, Florida Fish and Wildlife Conservation Commission, Florida Marine Research Institute. Review Draft 12/04/02.

Data and Resources

Additional Info

Field Value
Last Updated September 19, 2017, 02:37
Created June 3, 2017, 02:00
access_constraints ["Cite as: Ball, A. O. and US DOC; NOAA; NOS; Coastal Services Center (2012). NOAA Office for Coastal Management RoxAnn Acoustic Sensor Benthic Habitat Data, Rehoboth Bay, Delaware, 2000 (NODC Accession 0089461). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]", "NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose."]
bbox-east-long -75.0756
bbox-north-lat 38.6938
bbox-south-lat 38.6332
bbox-west-long -75.137
contact-email NCEI.Info@noaa.gov
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guid gov.noaa.nodc:0089461
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metadata-date 2016-11-29T17:28:10
metadata-language eng
progress completed
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temporal-extent-begin 2000-06-12
temporal-extent-end 2000-06-16