Online Links:
Online Links:
Cell size = 2.0 Number of rows = 8905 Number of columns = 8900 Data type = unsigned integer Boundary Xmin = 502900 Xmax = 520700 Ymin = 4192300 Ymax = 4210110 Statistics Minimum value = 1 Maximum value = 254 Mean = 124.62 Standard deviation = 23.47 Coordinate system description Projection UTM Zone 10 Datum WGS84 Units meterThe merged Reson 7125 acoustic-backscatter grid was originally archived as an ESRI grid with the following attributes:
Cell size = 2.0 Number of rows = 8905 Number of columns = 8900 Data type = unsigned integer Boundary Xmin = 502900 Xmax = 520700 Ymin = 4192448 Ymax = 4210110 Statistics Minimum value = 0 Maximum value = 224 Mean = 114.39 Standard deviation = 26.88 Coordinate system description Projection UTM Zone 10 Datum WGS84 Units meterThe merged SWATHPlus acoustic-backscatter grid was originally archived as an ESRI grid with the following attributes:
Cell size = 2.0 Number of rows = 8905 Number of columns = 8900 Data type = unsigned integer Boundary Xmin = 502900 Xmax = 520700 Ymin = 4192300 Ymax = 4210110 Statistics Minimum value = 23 Maximum value = 254 Mean = 131.58 Standard deviation = 29.45 Coordinate system description Projection UTM Zone 10 Datum WGS84 Units meter
These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify seafloor features.
Online Links:
Are there legal restrictions on access or use of the data?Access_Constraints: none
Use_Constraints:USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
| Data format: | The .zip file for the TIFF image includes the image (.tif), the world registration file (.tfw), and FGDC-compliant metadata. in format GeoTiff (version ArcMap (version 10.0, ESRI, 2011)) Raster data layer is registered TIFF image in the UTM Zone 10 coordinate system. Size: 30.2 |
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| Network links: |
https://pubs.usgs.gov/ds/781/DrakesBay/data/BackscatterA_8101_DrakesBay.zip https://pubs.usgs.gov/ds/781/DrakesBay/data_catalog_DrakesBay.html https://doi.org/10.3133/ds781 |
The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcMap TIFF. Users should download the ArcGIS Project File, DrakesBayGIS.mxd.zip, a compressed (with the "zip" command) version of the ArcMap document (.mxd) that has all the data layers loaded in the table of contents for “Drakes Bay and Vicinity“ and has all the data symbolized as on the map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.
