Peter Dartnell
Rikk G. Kvitek
2014
Bathymetry--Offshore of Salt Point Map Area, California
1.0
GeoTiff
Samuel Y. Johnson
Peter Dartnell
Nadine E. Golden
Stephen R. Hartwell
H. Gary Greene
Mercedes D. Erdey
Guy R. Cochrane
Rikk G. Kvitek
Michael W. Manson
Charles A. Endris
Bryan E. Dieter
Janet T. Watt
Lisa M. Krigsman
Ray W. Sliter
Erik N. Lowe
John L. Chin
2015
California State Waters Map Series--Offshore of Salt Point map area, California
map
Open-File Report
OFR 2015-1098
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2015/1098/
Nadine E. Golden
2013
California State Waters Map Series Data Catalog
database
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/ds/781/
This part of DS 781 presents data for the bathymetry and shaded-relief maps of the Offshore of Salt Point map area, California. Raster data file is included in "Bathymetry_OffshoreSaltPoint.zip", which is accessible from https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html.
The bathymetry and shaded-relief maps of the Offshore of Salt Point Map Area, California, were generated from bathymetry data collected by California State University, Monterey Bay (CSUMB), and by Fugro Pelagos. Mapping was completed between 2007 and 2010, using a combination of 200-kHz and 400-kHz Reson 7125, and 244-kHz Reson 8101 multibeam echosounders, as well as 468-kHz SEA SWATHPlus interferometric system. These mapping missions combined to collect bathymetry from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters. NOTE: the horizontal datum of the bathymetry data (NAD83) differs from the horizontal datum of other layers in this DS (WGS84). These data are not intended for navigational purposes.
To expand geologic mapping to the seafloor within the California's State Waters, to update coastal geologic mapping, and to contribute to a uniform regional geologic database, which can be used geographic information systems. Additionally, to provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the Point Reyes coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes.
None
2007
2010
ground condition
As needed
-123.48
-123.28
38.64
38.48
Global Change Master Directory (GCMD)
Oceans > Bathymetry/SeafloorTopography > Bathymetry
Oceans > Bathymetry/SeafloorTopography > Seafloor Topography
ISO 19115 Topic Category
geoscientificInformation
environment
oceans
imageryBaseMapsEarthCover
General
Seafloor Character
Fisheries
Ecosystem
Multibeam
Geology
Bathymetry
Backscatter
Intensity
Ocean Floor Topography
U.S. Geological Survey
USGS
Pacific Coastal and Marine Science Center
CMGP
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
Northern California
Salt Point
Sonoma County
If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy"
at URL: https://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html
This information is not intended for navigational purposes.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
USGS-authored or produced data and information are in the public domain. Acknowledge the U.S. Geological Survey and California State University, Monterey Bay, Seafloor Mapping Lab in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Peter Dartnell
U.S. Geological Survey,
Pacific Coastal and Marine Science Center
Physical Scientist
mailing and physical address
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
(831) 460-7415
(831) 427-4709
pdartnell@usgs.gov
<https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/images/Bathymetry_OffshoreSaltPoint.jpg>
Acoustic bathymetry imagery of the Offshore of Salt Point map area.
JPEG
Not applicable for raster data.
Unspecified
Complete
Horizontal_Positional_Accuracy_Report: Estimated to be no less than 2 m, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
Vertical_Positional_Accuracy_Report: Estimated to be no less than 20 cm, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
During the Fugro Pelagos and CSUMB mapping missions, an Applanix Position and Motion Compensation System for Marine Vessels (POS/MV, 320, v4) was used to accurately position the vessels during data collection, and it also accounted for vessel's motion such as heave, pitch, and roll (position accuracy, +/-2 m; pitch, roll, and heading accuracy, +/-0.02 degrees; heave accuracy, +/-5%, or 5 cm). KGPS altitude data (Fugro Pelagos, StarFix HP & XP units; CSUMB, NavCom 2050) were used to account for tide cycle fluctuations and sound velocity profiles were collected with an Applied Microsystems SVPlus sound velocimeter. Soundings were corrected for vessel motion using the Applanix POS/MV data, for variations in water-column sound velocity using the AM SVPlus data, and for variations in water height (tides) using vertical-position data from the KGPS receivers.
2010
Carrie Bretz
Seafloor Mapping Lab, California State Univ. Monterey Bay
Projects manager, GIS and metadata supervisor
mailing and physical address
100 Campus Center, Bldg 13
Seaside
CA
93955
USA
(831) 582-4197
cbretz@csumb.edu
California Seafloor Mapping Project 2-m-resolution bathymetry data within this map were downloaded from http://seafloor.csumb.edu/SFMLwebDATA.htm.
2012
Pete Dartnell
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Physical Scientist
mailing and physical address
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
(831) 460-7415
pdartnell@usgs.gov
Merge all bathymetry data into 2-m-resolution bathymetry grid and clip to the Offshore of Salt Point, California, map boundary. To create the shaded-relief imagery, an illumination having an azimuth of 300 degrees and 45 degrees above the horizon was applied to the bathymetry grid. Project shaded-relief grid from NAD-83 coordinates to WGS-84 coordinates using ESRI ArcTools.
2013
Pete Dartnell
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Physical Scientist
mailing and physical address
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
(831) 460-7415
pdartnell@usgs.gov
Raster
Grid Cell
8870
8890
1
Universal Transverse Mercator
10
0.9996
-123.00000
0.00000
500000.0
0.00
coordinate pair
2.0
2.0
Meters
NAD83
GRS80
6378137.00 meters
298.257223563
Value
Bathymetry depth value
ESRI
VALUE
Bathynetry depth values
ESRI
-97.47
2.19
meters
The complete Offshore of Salt Point bathymetry data was originally archived as an ESRI grid with the following attributes:
>Cell size = 2.0
>Number of rows = 8860
>Number of columns = 8870
>
>Data type = floating point
>
>Boundary
>Xmin = 473360
>Xmax = 491100
>Ymin = 4249860
>Ymax = 4267580
>
>Statistics
>Minimum value = -88.45
>Maximum value = -2.19
>Mean = -46.74
>Standard deviation = 20.19
>
>Coordinate system description
>Projection UTM
>Zone 10
>Datum NAD83
>Vertical Datum NAVD88
>Units meter
none
U.S. Geological Survey
mailing and physical address
345 Middlefield Rd
Menlo Park
CA
94025-3561
USA
(650) 329-4309
These databases, identified as bathymetry and shaded-relief maps of Offshore of Salt Point Map Area, California have been approved for release and publication by the U.S. Geological Survey (USGS). Although these databases have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although these data have been processed successfully on a computer system at 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. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
These data are not intended for navigational use.
TIFF
ArcMap (version 10.0, ESRI , 2011)
Raster data layer is registered TIFF image in the UTM Zone 10 coordinate system with datum NAD83.
The .zip file for the TIFF image includes the image (.tif), the world registration file (.tfw), and the text (.txt) and XML (.tif.xml) versions of the metadata for the Bathymetry data layer of Offshore Salt Point, California.
WinZip
15.5
https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data/Bathymetry_OffshoreSaltPoint.zip
https://pubs.usgs.gov/ds/781/
Data can be downloaded via the World Wide Web (WWW)
none
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, OffshoreSaltPointGIS.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 "Offshore Salt Point" and has all the data symbolized as on the data release map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.
20140630
20150514
Peter Dartnell
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Physical Scientist
mailing and physical address
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
(831) 460-7415
(831) 427-4709
pdartnell@usgs.gov
Content Standard for Digital Geospatial Metadata
("CSDGM version 2")
FGDC-STD-001-1998
universal time