Andrew W. Stevens
Joshua B. Logan
Daniel J. Hoover
Alexander G. Snyder
2017
Topography data from northern Monterey Bay, California, September and October 2015
comma-delimited text
data release
DOI:10.5066/F76H4GCW
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/F76H4GCW
https://www.sciencebase.gov/catalog/file/get/59e53709e4b05fe04cd1bc8c?name=mb15_sept_topo.csv
Andrew W. Stevens
Joshua B. Logan
Alexander G. Snyder
Daniel J. Hoover
Patrick L. Barnard
Jonathan A. Warrick
2017
Beach topography and nearshore bathymetry of northern Monterey Bay, California
data release
DOI:10.5066/F76H4GCW
Santa Cruz, CA
U.S. Geological Survey
https://doi.org/10.5066/F76H4GCW
This part of the data release presents topography data from northern Monterey Bay, California collected in September and October 2015. Topography data were collected on foot with survey-grade global navigation satellite system (GNSS) receivers mounted on backpacks and with an all-terrain vehicle (ATV) using a GNSS receiver mounted at a measured height above the ground.
Data were obtained to document changes in shoreline position and coastal morphology as they relate to episodic (storms), seasonal, interannual, and longer (for example, El NiƱo) processes. 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 topographic and shallow-water bathymetric features.
Additional information about the field activities from which these data were derived are available online at:
http://cmgds.marine.usgs.gov/fan_info.php?fan=2015-668-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
20150928
20151002
ground condition at time data were collected
Not planned
-122.029840
-121.788490
36.978660
36.807479
USGS Metadata Identifier
USGS:59e53709e4b05fe04cd1bc8c
USGS Thesaurus
topography
GPS measurement
ISO 19115 Topic Category
elevation
Data Categories for Marine Planning
Bathymetry and Elevation
Marine Realms Information Bank (MRIB) keywords
Global Positioning System (GPS) observations
Global Change Master Directory (GCMD)
GPS (Global Positioning System)
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Pacific Coastal and Marine Science Center
PCMSC
Geographic Names Information System (GNIS)
Pacific Ocean
Monterey Bay
Monterey County
Santa Cruz County
none
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 navigational purposes.
Andrew W. Stevens
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Oceanographer
mailing and physical
2885 Mission St.
Santa Cruz
CA
95060
USA
831-460-7424
astevens@usgs.gov
Repeatability tests were conducted across different survey platforms, but no comparisons to "true" values were conducted.
All data falls within expected ranges.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Survey-grade positions of the survey platforms were achieved with global navigation satellite system (GNSS) receivers and a single GNSS base station. The position of the GNSS base station was derived from two static GNSS occupations on January 14 and January 16, 2014, with durations of 6 and 3 hours, respectively. The static observations were processed using the National Geodetic Survey Online Positioning User Service (OPUS) and averaged to derive the final base station coordinates relative to the North American Datum of 1983 (2011 realization). Post-processing of raw GNSS data was performed with Trimble Business Center and Waypoint Grafnav, for the backpack- and ATV- platforms, respectively. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover trajectories is 0.8 cm + 0.5 ppm. Baselines from the GNSS base station varied between 1.5 km and 29 km with a mean of 13 km, suggesting an average horizontal accuracy of about 1.5 cm. Uncertainty in the horizontal positions associated with sinking into the substrate or variable posture during data collection of the surveyors is unknown.
Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover trajectories is 1.5 cm + 1 ppm. Baselines from the GNSS base station varied between 1.5 km and 29 km with a mean of 13 km, suggesting the average vertical accuracy of topographic measurements to be about 3 cm. Uncertainty in the vertical positions associated with sinking into the substrate or variable posture during data collection of the surveyors is unknown.
Topographic profiles were collected on foot with GNSS receivers mounted on backpacks. Prior to data collection, vertical distances between the GNSS antennas and the ground were measured using a tape measure. Hand-held data collectors were used to log raw data and display navigational information allowing surveyors to navigate survey lines spaced at 50- to 250-m intervals along the beach. Profiles were surveyed from the landward edge of the study area (either the base of a bluff, engineering structure, or just landward of the primary dune) over the beach foreshore, to wading depth on the same series of transects as nearshore bathymetric surveys that were conducted during the same time period. Additional topographic data were collected between survey lines with an all-terrain vehicle (ATV) to constrain the elevations and alongshore extent of major morphological features. Raw GNSS data were logged internally at 2-Hz intervals using a GNSS receiver mounted at a measured height above the ground.
20151002
Positioning data from the survey platforms were post-processed to apply differential corrections from a GNSS base station with known horizontal and vertical coordinates relative to the North American Datum of 1983 (2011 realization). Post-processing of raw GNSS data was performed with Trimble Business Center and Waypoint Grafnav, for the backpack- and ATV- platforms, respectively. Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey Geoid12a offsets. The final point data from the topographic surveyors are projected in cartesian coordinates using the Universal Transverse Mercator (UTM), Zone 10 North, meters coordinate system.
20151016
All available topography data from the survey were compiled into a comma-delimited text file for distribution
20170925
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Point
Point
183058
0.000001
0.000001
Decimal degrees
North American Datum of 1983, 2011 realization
GRS_1980
6378137.0
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
Attribute Table
Table containing attribute information associated with the dataset
Producer defined
Date and Time (yyyy-mm-dd HH:MM:SS.FFF)
The date and time of data collection in Greenwich Mean Time (GMT).
Producer Defined
2015-09-28 21:03:28.000
2015-10-02 01:19:54.000
date and time in mm/dd/yyyy HH:MM:SS.FFF format
Longitude (deg. E)
Longitude coordinate of data point relative to the North American Datum of 1983 (2011 realization)
Producer defined
-122.029840
-121.788490
Decimal degrees
Latitude (deg. N)
Latitude coordinate of data point relative to the North American Datum of 1983 (2011 realization)
Producer defined
36.807479
36.978660
Decimal degrees
Easting (m)
East coordinate of data point relative to the North American Datum of 1983 (2011 realization), projected in the Universal Transverse Mercator (UTM), Zone 10 North, meters, coordinate system
Producer defined
586376.851
608068.064
meters
Northing (m)
North coordinate of data point relative to the North American Datum of 1983 (2011 realization), projected in the Universal Transverse Mercator (UTM), Zone 10 North, meters, coordinate system
Producer defined
4074198.273
4093033.110
meters
Ellipsoid Height (m)
Height in meters of data point with reference to the reference ellipsoid
Producer defined
-34.436
-20.027
meters
Orthometric Height (m)
Height in meters of data point with reference to the North American Vertical Datum of 1988.
Producer defined
-1.196
13.749
meters
U.S. Geological Survey - Science Base
U.S. Geological Survey
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
USA
1-888-275-8747
sciencebase@usgs.gov
Topography data are available as a comma-delimited text file (mb15_sept_topo.csv), along with associated FGDC-compliant metadata.
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.
comma-delimited text
Matlab 9.2.0.556344
text
comma-delimited text file
14.67
https://www.sciencebase.gov/catalog/file/get/59e53709e4b05fe04cd1bc8c?name=mb15_sept_topo.csv
https://doi.org/10.5066/F76H4GCW
Data can be downloaded via the Internet
None
20201019
Andrew W. Stevens
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Oceanographer
mailing and physical
2885 Mission St.
Santa Cruz
CA
95060
USA
831-460-7424
astevens@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998