|Rocks||Rocky areas characterized by high-backscatter targets with low-backscatter shadows|
|Sandwaves||Sand wave fields characterized by areas of tiger-striped backscatter|
|Scarp||Areas of wave-cut scarps and benches characterized by discontinuous, curvilinear, sharply contrasting high- and low-backscatter patterns|
|Trawlmks||Areas of trawl marks characterized by either low or high backscatter lines|
|Lowbkstr||Low backscatter areas|
|Highbkstr||High backscatter areas|
|Modbkstr||Moderate backscatter areas, without other features|
|Outliers||Areas of erosional outliers|
|Spoils||Areas of dredge spoils|
This data layer is a component of the H11322 Survey, Rhode Island Sound, GIS database and represents an interpretation of the sidescan-sonar mosaic and bathymetry imagery for the study area. The interpretation can be used as an overlay for the mosaic image and shows areas of sand waves, rocky areas, benches, low backscatter, high backscatter, moderate backscatter, erosional outliers, scarp, dredge spoils and trawl marks.
Are there legal restrictions on access or use of the data?
Use_Constraints:Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of this dataset.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
|Data format:||The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information. The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the dataset <data set name>.shp.xml. Three other forms of the metadata are also available: FGDC html, FAQ html, and ASCII text. In addition, a browse graphic showing the data layer coverage and extent is included. in format SHP (version ArcView 3.3) ESRI polygon shapefile Size: 0.157|
|Media you can order:||DVD-ROM (Density 4.75 Gbytes) (format UDF)|
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.