Cape Cod National Seashore Side-scan Sonar Data, 2015

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This dataset contains acoustic sonar data completed within and adjacent to the boundaries of Cape Cod National Seashore (CaCo) from Race Point to Long Point in Provincetown, Massachusetts, June 19 to August 7, 2015 using an Edgetech 6205 Phase-Measuring Sidescan Sonar collected with Edgetech Discover Baythymetric version 1.01 and Hypack 2015. In total, 446 .jsf and 457 .hsx were created covering 577 hectares were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines.

Sub-bottom seismic reflection raw data, 2014-2015, Cape Cod National Seashore

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This dataset contains sub-bottom seismic reflection data collected during acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CACO) from 2014-2015.

Cape Cod National Seashore 1m Depth Contours, 2015

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This dataset shows contours created from acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CaCo) from Race Point to Long Point in Provincetown, Massachusetts, June 19 to August 7, 2015. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidescan Sonar. In total, 568 hectares were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines.

Ground-truthing images, 2014-2015, Cape Cod National Seashore

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Still images taken in conjunction with biological and sediment grab samples in order to describe the benthic invertebrate community and sediment characteristics of the Pleasant Bay, Nauset Marsh, Wellfleet harbor and Herring Cove Coastal Systems. These data are a part of the Submerged Marine Habitat Mapping Studies project. One cast to the seafloor was conducted at each station to collect conductivity, temperature and depth (CTD) data after the boat had been anchored at the station, but before collecting the grab samples.

Mapping Extent for Sidescan Sonar Data, 2014-2015, Cape Cod National Seashore

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This dataset shows the extent of sidescan sonar data collected during acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CACO) from 2014-2015. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidescan Sonar. In total, 668 hectares were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines.

Bathymetry Data, 2014-2015, Cape Cod National Seashore

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This dataset shows the bathymetry data collected during acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CACO) from 2014-2015. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidescan Sonar. In total, 668 hectares were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines.

Ground-truth Data, Submerged Marine Habitat Mapping, Cape Cod National Seashore

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These files contain ground-truth data collected in support of Submerged Marine Habitat Mapping at Cape Cod National Seashore. Files include data concerning CTD profiles, sampling locations, sediment grain size, invertebrate samples, indexes of still phots and videos, and field notes.

Mapping Extent for Bathymetry Data, 2014-2015, Cape Cod National Seashore

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This dataset shows the extent of bathymetry data collected during acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CACO) from 2014-2015. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidescan Sonar. In total, 668 hectares were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines.

Coastal/Marine Ecological Classification Standard (CMECS) Benthic Habitat Classifications, 2014-2015, Cape Cod National Seashore

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Benthic habitat maps were developed for the CACO study areas following the top-down mapping approach, for which habitat map units are geologically defined based on the presumption that geologic environments or features contain distinct biological assemblages. The resulting habitats are classified according to the CMECS framework and are referred to as “biotopes.” The term “biotope” is specific in that it integrates biotic-abiotic characteristics to offer more ecologically meaningful information. In this study, biotopes reflect the relationship between macrofaunal communities and geological features of their associated environments within the defined map units. The resulting biotopes are considered preliminary because the relationships identified have not been repeatedly demonstrated over time.

Side-scan Sonar Data, 2014-2015, Gateway National Recreation Area

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The side scan sonar survey was done simultaneously with the bathymetry swath survey and used an EdgeTech Model 4125 Towfish bow-mounted from Lookdown at 400 and 900 kHz. The 4125 Towfish utilizes EdgeTech’s Full Spectrum CHIRP technology to produce higher resolution images than a non-CHIRP system. EdgeTech Discovery Software was used to acquire the side scan sonar data using the JSF format at a resolution of about 2.3 cm. All JSF files collected using EdgeTech’s Discover Software were processed using John Gann’s Chesapeake Technology SonarWiz5. Dimensions of contacts should be considered accurate to +/- 30% of the measured dimensions. This system also records the direct arrival intensity data.