Metadata: Identification_Information: Citation: Citation_Information: Originator: Andrew W. Stevens Originator: Alexander G. Snyder Publication_Date: 2017 Title: Nearshore bathymetry data from northern Monterey Bay, California, March 2016 Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F76H4GCW Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F76H4GCW Online_Linkage: https://www.sciencebase.gov/catalog/file/get/59f10da4e4b0220bbd9c6bd1?name=mb16_mar_pwc.csv Larger_Work_Citation: Citation_Information: Originator: Andrew W. Stevens Originator: Joshua B. Logan Originator: Alexander G. Snyder Originator: Daniel J. Hoover Originator: Patrick L. Barnard Originator: Jonathan A. Warrick Publication_Date: 2017 Title: Beach topography and nearshore bathymetry of northern Monterey Bay, California Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F76H4GCW Publication_Information: Publication_Place: Santa Cruz, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F76H4GCW Description: Abstract: This part of the data release presents bathymetry data from northern Monterey Bay, California collected in March 2016 using two personal watercraft (PWCs). The PWCs were equipped with single-beam echosounders and survey-grade global navigation satellite system (GNSS) receivers. Purpose: 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. Supplemental_Information: 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=2016-627-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20160321 Ending_Date: 20160331 Currentness_Reference: ground condition at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: Not planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.041048 East_Bounding_Coordinate: -121.790802 North_Bounding_Coordinate: 36.978406 South_Bounding_Coordinate: 36.806647 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:59f10da4e4b0220bbd9c6bd1 Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: bathymetry Theme_Keyword: bathymetry measurement Theme_Keyword: GPS measurement Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Bathymetry and Elevation Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: single-beam echo sounder Theme_Keyword: Global Positioning System (GPS) observations Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme: Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD) Theme_Keyword: Water Depth Theme_Keyword: GPS (Global Positioning System) Theme_Keyword: Echo Sounders Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place_Keyword: Monterey Bay Place_Keyword: Monterey County Place_Keyword: Santa Cruz County Access_Constraints: none 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 navigational purposes. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew W. Stevens Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical Address: 2885 Mission St. City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: USA Contact_Voice_Telephone: 831-460-7424 Contact_Electronic_Mail_Address: astevens@usgs.gov Cross_Reference: Citation_Information: Originator: International Hydrographic Organization (IHO) Publication_Date: 2008 Title: IHO standards for hydrographic surveys (5th ed.) Geospatial_Data_Presentation_Form: comma-delimited text Publication_Information: Publication_Place: Monaco Publisher: International Hydrographic Bureau Special Publication 44, 28p. Online_Linkage: https://www.iho.int/iho_pubs/standard/S-44_5E.pdf Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: All data falls within expected ranges. Completeness_Report: 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. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Survey-grade positions of the personal watercraft (PWCs) 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). Positioning data from the PWCs were post-processed using Waypoint Grafnav to apply differential corrections from the GNSS base station. 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 the average horizontal accuracy of survey vessel positions to be about 1.5 cm. Uncertainty in the horizontal positions associated with pitch and roll of the survey vessels is unknown. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Uncertainty in the final elevations is derived from the combination of uncertainty in the GNSS positioning and bathymetric sounding measurements. 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 survey vessel positions to be about 3 cm. The manufacturer of the single-beam echosounder used in this study reports a vertical accuracy of 1 cm. Additional uncertainty in the final computed elevations data is related to unmeasured variability in the speed of sound used to compute depths from bathymetric soundings and, thus, is depth-dependent. Based on analysis of available speed of sound measurements, we estimate uncertainties in the final depth soundings to be no greater than 1 percent of the water depth. The total vertical uncertainty is calculated using the constant- and depth-dependent factors summed in quadrature (International Hydrographic Organization, 2008). The vertical uncertainty in final elevations varied between 2 cm and 16 cm with a mean vertical uncertainty of 9 cm. Uncertainty in the vertical positions associated with pitch and roll of the survey vessels is unknown. Lineage: Process_Step: Process_Description: Bathymetry data were collected between March 21 and March 31, 2016 using two identical single-beam sonar systems and global navigation satellite systems (GNSS) receivers mounted on personal watercraft (PWC). The sonar systems consisted of an Odom Echotrac CV-100 single-beam echosounder and 200 kHz transducer with a 9-degree beam angle. Raw acoustic backscatter returns were digitized by the echosounder with a vertical resolution of 1.25 cm. Depths from the echosounders were computed using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning of the survey vessels was determined at 10-Hz using Trimble R7 GNSS receivers and Zephyr Model 2 antennas operating in autonomous mode. Output from the GNSS receivers and sonar systems were combined in real time on the PWC by a computer running HYPACK hydrographic survey software. Navigation information was displayed on a video monitor, allowing PWC operators to navigate along survey lines at speeds of 2 to 3 m/s. Process_Date: 20160331 Process_Step: Process_Description: Survey-grade positions of the PWCs were achieved with a single-base station and differential post-processing. Positioning data from the GNSS receivers were post-processed using Waypoint Grafnav 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). Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey Geoid12a offsets. Bathymetric data were merged with post-processed positioning data and spurious soundings were removed using a custom Graphical User Interface (GUI) programmed with the computer program MATLAB. The final point data from the PWCs are projected in cartesian coordinates using the UTM Zone 10 North, meters coordinate system. Process_Date: 20161107 Process_Step: Process_Description: All available bathymetry data from the survey were compiled into a comma-delimited text file for distribution Process_Date: 20171025 Process_Step: Process_Description: Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Process_Date: 20201019 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 1210920 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983, 2011 realization Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Attribute Table Entity_Type_Definition: Table containing attribute information associated with the dataset Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Date and Time (yyyy-mm-dd HH:MM:SS.FFF) Attribute_Definition: The date and time of data collection in Grenwich Mean Time (GMT). Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2016-03-21 15:15:43.900 Range_Domain_Maximum: 2016-03-31 00:20:11.335 Attribute_Units_of_Measure: date and time in mm/dd/yyyy HH:MM:SS.FFF format Attribute: Attribute_Label: Longitude (deg. E) Attribute_Definition: Longitude coordinate of data point relative to the North American Datum of 1983 (2011 realization) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -122.041048 Range_Domain_Maximum: -121.790802 Attribute_Units_of_Measure: Decimal degrees Attribute: Attribute_Label: Latitude (deg. N) Attribute_Definition: Latitude coordinate of data point relative to the North American Datum of 1983 (2011 realization) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 36.806647 Range_Domain_Maximum: 36.978406 Attribute_Units_of_Measure: Decimal degrees Attribute: Attribute_Label: Easting (m) Attribute_Definition: 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 Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 585378.106 Range_Domain_Maximum: 607855.455 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Northing (m) Attribute_Definition: 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 Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4074099.947 Range_Domain_Maximum: 4093005.208 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Ellipsoid Height (m) Attribute_Definition: Height in meters of data point with reference to the reference ellipsoid Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -58.219 Range_Domain_Maximum: -32.761 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Orthometric Height (m) Attribute_Definition: Height in meters of data point with reference to the North American Vertical Datum of 1988. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -24.336 Range_Domain_Maximum: 0.675 Attribute_Units_of_Measure: meters Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: U.S. Geological Survey - Science Base Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: Bathymetry data are available as a comma-delimited text file (mb16_mar_pwc.csv), along with associated FGDC-compliant metadata. Distribution_Liability: 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Version_Number: Matlab 9.2.0.556344 Format_Specification: text Format_Information_Content: comma-delimited text file Transfer_Size: 98.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/59f10da4e4b0220bbd9c6bd1?name=mb16_mar_pwc.csv Network_Resource_Name: https://doi.org/10.5066/F76H4GCW Access_Instructions: Data can be downloaded via the Internet Fees: None Metadata_Reference_Information: Metadata_Date: 20201019 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew W. Stevens Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical Address: 2885 Mission St. City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: USA Contact_Voice_Telephone: 831-460-7424 Contact_Electronic_Mail_Address: astevens@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998