Rikk G. Kvitek
Carrie K. Bretz
Peter Dartnell
Sam Y. Johnson
Guy R. Cochrane
2014
Bathymetry--Offshore San Gregorio, California
1.0
GeoTiff
Guy R. Cochrane
Peter Dartnell
H. Gary Greene
Janet T. Watt
Nadine E. Golden
Charles A. Endris
Eleyne L. Phillips
Stephen R. Hartwell
Samuel Y. Johnson
Rikk G. Kvitek
Mercedes D. Erdey
Carrie .K. Bretz
Michael W. Mansion
Ray W. Sliter
Stephanie L. Ross
Brian E. Dieter
John L. Chin
2014
California State Waters Map Series--Offshore of San Gregorio Map Area, California
map
Scientific Investigations Map
SIM 3306
Reston, VA
U.S. Geological Survey
https://dx.doi.org/10.3133/sim3306
https://pubs.usgs.gov/sim/3306/
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 SIM 3306 presents data for the bathymetry and shaded-relief maps (see sheet 1 and 2, SIM 3306) of the Offshore of San Gregorio map area, California. The raster data file is included in "Bathymetry_OffshoreSanGregorio.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshoreSanGregorio/data_catalog_OffshoreSanGregorio.html.
The bathymetry and shaded-relief maps of Offshore San Gregorio, California, were generated from bathymetry data collected by Fugro Pelagos and by California State University, Monterey Bay (CSUMB). Mapping was completed in 2006 and 2007, using a combination of 400-kHz Reson 7125 and 244-kHz Reson 8101 multibeam echosounders. These mapping missions combined to collect bathymetry (sheets 1, 2) from about the 10-m isobath to beyond the 3-nautical-mile limit of CaliforniaŐs State Waters.
These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes. These data can be used with geographic information systems or other software to identify bathymetric features.
2006
2007
ground condition
As needed
-122.54
-122.34
37.39
37.23
Global Change Master Directory (GCMD)
Oceans > Bathymetry/SeafloorTopography > Bathymetry
Oceans > Bathymetry/SeafloorTopography > Seafloor Topography
General
Marine Geology
Multibeam
Geology
Bathymetry
Water Depth
Ocean Floor Topography
U.S. Geological Survey
USGS
Pacific Coastal and Marine Science Center
CSMP
ISO 19115 Topic Category
geoscientificInformation
imageryBaseMapsEarthCover
oceans
Geographic Names Information System (GNIS)
San Gregorio
Half Moon Bay
State of California
None
Please recognize the U.S. Geological Survey (USGS) and California State University, Monterey Bay, Seafloor Mapping Lab (CSUMB). USGS-authored or
produced data and information are in the public domain. 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.
Acknowledge the USGS and CSUMB in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
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.
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/OffshoreSanGregorio/images/Bathymetry_OffshoreSanGregorio.jpg>
Shaded relief imagery of depths offshore San Gregorio.
GIF Offshore San Gregorio
Not applicable for raster data.
Unspecified
Complete
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.
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 mapping missions, an Applanix position and motion compensation system (POS/MV) was used to accurately position the vessel during data collection, and it also accounted for vessel motion such as heave, pitch, and roll (position accuracy, ±2 m; pitch, roll, and heading accuracy, ±0.02ˇ; 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. Final XYZ soundings and bathymetric-surface models were referenced to the World Geodetic System of 1984 (WGS 1984) relative to the North American Vertical Datum of 1988 (NAVD 1988).
2007
Carrie Bretz
Seafloor Mapping Lab, California State University Monterey Bay
Projects Manager, GIS & Metadata Supervisor
mailing and physical address
100 Campus Center, Bldg 13
Seaside
CA
93955
USA
831.582.4197
carrie_bretz@csumb.edu
California Seafloor Mapping Project 2-m resolution bathymetry data; CSMP survey blocks CC-07, CC-08, CC-09 within this map were downloaded from California State University, Monterey Bay, Seafloor Mapping Lab (http://seafloor.csumb.edu/SFMLwebDATA.htm). Merge all bathymetry data into 2-m-resolution bathymetry grid and clip to the Offshore San Gregorio, 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.
2009
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
Universal Transverse Mercator
10
0.9996
-123.00000
0.00000
500000.0
0.00
coordinate pair
2.0
2.0
Meters
WGS84
WGS84
6378137.00 meters
298.257223563
The merged bathymetry grid was originally archived as an ESRI grid
with the following attributes:
>Cell size = 2.0
>Number of rows = 6132
>Number of columns = 8951
>
>Data type = floating point
>
>Boundary
>Xmin = 540285
>Xmax = 552549
>Ymin = 4120523
>Ymax = 4138425
>
>Statistics
>Minimum value = -66.30
>Maximum value = -1.69
>Mean = -28.19
>Standard deviation = 12.11
>
>Coordinate system description
>Projection UTM
>Zone 10
>Datum WGS84
>VDatum NAVD88
>Units meter
none
20130614
20130614
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