Bathymetry and Acoustic Backscatter—Outer Mainland Shelf and Slope, Gulf of Santa Catalina, Southern California

Data Catalog

This report contains bathymetry and acoustic-backscatter data collected along the outer mainland shelf and slope, Gulf of Santa Catalina in southern California. These data were collected in the summers of 2010 and 2011 by the U.S. Geological Survey using a 100kHz Reson 7111 multibeam echsounder (USGS FACS-ID's S-11-10-SC, S-23-10-SC, and S-07-11-SC). See report summary for mapping and data processing details.

The tables below provide the bathymetry and acoustic-backscatter data in several formats. To view an overview map, click on the "Quick View" links. Bathymetry data are available in ASCIIRaster format files and shaded-relief bathymetry geoTIFF images. Acoustic-backscatter images are available as geoTIFF images. Bathymetric standard deviation GRIDS are also provided for each USGS survey (S-11-10-SC, S-23-10-SC, and S-07-11-SC). These GRIDS provide the user with a level of confidence of each bathymetric cell value within the grid. The bathymetry data are horizonatally projected to UTM, zone 11, North America Datum of 1983 (CORS96) coordinates, vertically referenced to the North American Vertical Datum of 1988 (NAVD88). The shaded-relief and acoustic backscatter geoTIFF images as well as the standard deviation GRIDS are horizonatally projected to UTM, zone 11, North America Datum of 1983 (CORS96) coordinates.

NOTE THAT THE USGS COLLECTS BATHYMETRIC DATA FOR SCIENTIFIC PURPOSES ONLY. THE USGS DOES NOT GUARANTEE THAT FULL BOTTOM SEARCH HAS BEEN ACHIEVED AND THE DATA HAVE NOT BEEN INSPECTED FOR DANGERS TO NAVIGATION. THESE DATA ARE NOT INTENDED FOR NAVIGATION.

Bathymetry data available to download

File Explanation	Bathymetry data	Shaded Relief in geoTIFF format	Quick View
20-m bathymetry (NAD-83, NAVD-88)	ASCIIRaster USGS_GoSC_nad83.zip (4.6 Mb)	USGS_GoSC_shd.zip (868 kb)	bathy_map
5-m shelf bathymetry (NAD-83, NAVD-88)	ASCIIRaster USGS_GoSC_shelf5m_nad83.zip (9.9 Mb)	USGS_GoSC_shelf5m_shd.zip (2.2 Mb)
Merged USGS and CSMP 5-m shelf bathymetry (NAD-83, NAVD-88)	ASCIIRaster shelf_merge_5m_nad83.zip (33.1 Mb)	shelf_merge_5m_shd.zip (4.2 Mb)
USGS S-11-10-SC Standard Deviation GRID	ASCIIRaster S-11-10-SC_stddev.zip (816 Kb)
USGS S-23-10-SC Standard Deviation GRID	ASCIIRaster S-23-10-SC_stddev.zip (1.2 Mb)
USGS S-07-11-SC Standard Deviation GRID	ASCIIRaster S-07-11-SC_stddev.zip (440 Kb)
METADATA	TEXT, HTML, FAQ, XML

 

Backscatter data available to download

File Name	Backscatter in geoTIFF format	Quick View
NORTH (S-07-11-SC)	USGS_GoSC_back_nth.zip (2.1 Mb)	backscatter_map
CENTRAL (S-23-10-SC)	USGS_GoSC_back_cen.zip (5.9 Mb)
SOUTH (S-11-10-SC)	USGS_GoSC_back_sth.zip (3.4 Mb)
METADATA	TEXT, HTML, FAQ, XML

First posted May 16, 2014