Cell size = 5.0 Number of rows = 5270 Number of columns = 8136 Data type = floating point Boundary Xmin = 251142 Xmax = 291822 Ymin = 3774302 Ymax = 3800652 Statistics Minimum value = -66.38 Maximum value = 0.35 Mean = -25.18 Standard deviation = 2.54 Coordinate system description Projection UTM Zone 11 Datum WGS84 Vertical Datum MLLW Units meterThe complete 5-m-resolution backscatter grid for the southern region was originally archived as an ESRI grid with the following attributes.
Cell size = 5.0 Number of rows = 4397 Number of columns = 9655 Data type = floating point Boundary Xmin = 262817 Xmax = 311092 Ymin = 3752652 Ymax = 3752652 Statistics Minimum value = -70.61 Maximum value = 36.69 Mean = -22.69 Standard deviation = 5.55 Coordinate system description Projection UTM Zone 11 Datum WGS84 Vertical Datum MLLW Units meter
These data are intended for policy makers, resource managers, science researchers, students, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation.
Are there legal restrictions on access or use of the data?
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 (USGS_NChannelIslands_NorthArea_Backscatter_5m.zip) includes the ASCIIRaster data (.asc, .prj), as well as FGDC-compliant metadata (.xml) for the north part of the study area in format ASCIIRaster (version ArcMap (version 10.0, Esri, 2011)) Raster data layer is registered ASCIIRaster in the UTM Zone 11 coordinate system with datum WGS84. Size: 42|
|Data format:||The .zip file (USGS_NChannelIslands_SouthArea_Backscatter_5m.zip) includes the ASCIIRaster data (.asc, .prj), as well as FGDC-compliant metadata (.xml) for the south part of the study area in format ASCIIRaster (version ArcMap (version 10.0, Esri, 2011)) Raster data layer is registered ASCIIRaster in the UTM Zone 11 coordinate system with datum WGS84. Size: 50|
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 ASCIIRaster.