Digital elevation models (DEMs) of northern Monterey Bay, California, September 2017

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Andrew W. Stevens
Originator: Joshua B. Logan
Originator: Alexander G. Snyder
Originator: Daniel J. Hoover
Publication_Date: 2017
Title:
Digital elevation models (DEMs) of northern Monterey Bay, California, September 2017
Geospatial_Data_Presentation_Form: Esri ARC/INFO ASCII GRID
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: 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 digital elevation models (DEMs) derived from bathymetry and topography data of northern Monterey Bay, California collected in September 2017. Bathymetry data were collected using two personal watercraft (PWCs), each equipped with single-beam echosounders and survey-grade global navigation satellite system (GNSS) receivers. Topography data were collected on foot with GNSS receivers mounted on backpacks and with an all-terrain vehicle (ATV) using a GNSS receiver mounted at a measured height above the ground. Additional topography data were collected with a terrestrial lidar scanner. DEM surfaces were produced from all available elevation data using linear interpolation.
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 Niño) 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=2017-678-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: 20170917
Ending_Date: 20170921
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: -122.025813
East_Bounding_Coordinate: -121.787918
North_Bounding_Coordinate: 36.978843
South_Bounding_Coordinate: 36.806602
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: bathymetry measurement
Theme_Keyword: topography
Theme_Keyword: GPS measurement
Theme_Keyword: LIDAR
Theme_Keyword: digital elevation models
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: topographic mapping
Theme_Keyword: Global Positioning System (GPS) observations
Theme_Keyword: coastal sediment budget
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
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
image map showing overview of digital elevation models (DEMs) of northern Monterey Bay, color-coded to show elevation
Browse_Graphic_File_Type: PNG
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
four zoomed-in image maps showing digital elevation models (DEMs) for (A) Santa Cruz, (B) Soquel Cove, (C) Manresa, and (D) Moss Landing areas of northern Monterey Bay, color-coded to show elevation
Browse_Graphic_File_Type: PNG
Native_Data_Set_Environment: Matlab version 9.2.0.556344 running on Microsoft Windows 7
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:
Repeatability tests were conducted across different survey platforms, but no comparisons to "true" values 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:
Digital elevation models (DEMs) are created by interpolating between elevation measurements as much as 500 meters apart, for this reason we cannot evaluate the accuracy of each point in a DEM, only the original data from which it is generated. The horizontal accuracy of the individual points was assessed based on the combined uncertainty of GNSS data points and terrestrial lidar data. Manufacturer-reported accuracy for the differentially corrected horizontal positions for the GNSS receivers used to collect the topographic and bathymetric measurements 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 platform positions to be about 1.5 cm. The average uncertainty in the horiontal coordinates of the terrestrial lidar data is esimated to be 7 cm.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Digital elevation models (DEMs) are created by interpolating between elevation measurements as much as 500 meters apart, for this reason we cannot evaluate the accuracy of each point in a DEM, only the original data from which it is generated. An average estimated vertical accuracy of 3 cm for the topographic GNSS backpack- and ATV-survey platforms was estimated by using the manufacturer reported vertical accuracy of 1.5 cm + 1 ppm for differentially corrected kinematic data. The vertical accuracy of the terrestrial lidar data was tested by comparing the final elevation values to concurrently collected topographic GNSS data. The RMS errors calculated for the vertical differences between these data and the point cloud data were typically found to be less than or equal to about 7 cm. Uncertainty in the bathymetry data is related the precision of the GNSS positioning and single-beam echosounders as well as unmeasured variability in the speed of sound used to compute depths from bathymetric soundings. 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 of the bathymetry data is calculated using the constant- and depth-dependent factors summed in quadrature (International Hydrographic Organization, 2008). The average vertical uncertainty in bathymetry data is estimated to be 9 cm.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Andrew W. Stevens
Originator: Alexander G. Snyder
Publication_Date: 2017
Title:
Nearshore bathymetry data from northern Monterey Bay, California, September 2017
Geospatial_Data_Presentation_Form: comma-delimited text
Publication_Information:
Publication_Place: online
Publisher:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Online_Linkage:
Type_of_Source_Media: digital dataset
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170917
Ending_Date: 20170920
Source_Currentness_Reference: ground condition at time data were collected
Source_Citation_Abbreviation: bathymetry data
Source_Contribution:
Bathymetry data were combined with topography data, and then interpolated into a gridded surface
Source_Information:
Source_Citation:
Citation_Information:
Originator: Andrew W. Stevens
Originator: Joshua B. Logan
Originator: Daniel J. Hoover
Originator: Alexander G. Snyder
Publication_Date: 2017
Title:
Topography data from northern Monterey Bay, California, September 2017
Geospatial_Data_Presentation_Form: comma-delimited text
Publication_Information:
Publication_Place: online
Publisher:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Online_Linkage:
Type_of_Source_Media: digital dataset
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170918
Ending_Date: 20170921
Source_Currentness_Reference: ground condition at time data were collected
Source_Citation_Abbreviation: topography data
Source_Contribution:
Topography data were combined with bathymetry data, and then interpolated into a gridded surface
Source_Information:
Source_Citation:
Citation_Information:
Originator: Joshua B. Logan
Originator: Alexander G. Snyder
Publication_Date: 2017
Title:
Terrestrial lidar data from northern Monterey Bay, California, September 2017
Geospatial_Data_Presentation_Form: comma-delimited text
Publication_Information:
Publication_Place: online
Publisher:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Online_Linkage:
Type_of_Source_Media: digital dataset
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170920
Ending_Date: 20170921
Source_Currentness_Reference: ground condition at time data were collected
Source_Citation_Abbreviation: terrestrial lidar data
Source_Contribution:
Topography data were combined with bathymetry data, and then interpolated into a gridded surface
Process_Step:
Process_Description:
Quality control was applied to raw topography, terrestrial lidar, and bathymetry data. Comparisons were performed to ensure internal consistency between the survey platforms. DEMs were produced by linear interpolation of all available elevation point data with the computer program MATLAB. Data were exported in ESRI ARC ascii grid format for distribution.
Source_Used_Citation_Abbreviation: bathymetry data, topography data, terrestrial lidar data
Process_Date: 20171211
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 2
Ordinate_Resolution: 2
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: NAD83 (2011)
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: Elevation (NAVD88)
Attribute_Definition:
Elevation relative to the North American vertical datum of 1988 (NAVD88)
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -23.598
Range_Domain_Maximum: 7.742
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:
DEM grids are available in Esri ARC/INFO ASCII GRID format (mb17_sept_dem_manresa.asc; mb17_sept_dem_mosslanding.asc; mb17_sept_dem_santacruz.asc; mb17_sept_dem_soquelcove.asc), along with low-resolution browse graphics showing the DEMs color-coded by elevation (mb17_sept_dems_overall.png; mb17_sept_dems_inset.png) and 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: png
Format_Version_Number: Matlab 9.2.0.556344
Format_Specification: PNG Image
Format_Information_Content:
PNG image showing individual digital elevation models of northern Monterey Bay in detail
File_Decompression_Technique: none
Transfer_Size: 2.0
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: png
Format_Version_Number: Matlab 9.2.0.556344
Format_Specification: PNG Image
Format_Information_Content:
PNG image showing overview of digital elevation models of northern Monterey Bay
File_Decompression_Technique: none
Transfer_Size: 1.4
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Number: ArcGIS 10.1
Format_Specification: Esri ARC/INFO ASCII GRID
Format_Information_Content:
Esri ASCII raster file containing digital elevation model of northern Monterey Bay, Manresa sub-area
File_Decompression_Technique: none
Transfer_Size: 110.8
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Number: ArcGIS 10.1
Format_Specification: Esri ARC/INFO ASCII GRID
Format_Information_Content:
Esri ASCII raster file containing digital elevation model of northern Monterey Bay, Moss Landing sub-area
File_Decompression_Technique: none
Transfer_Size: 129.5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Number: ArcGIS 10.1
Format_Specification: Esri ARC/INFO ASCII GRID
Format_Information_Content:
Esri ASCII raster file containing digital elevation model of northern Monterey Bay, Santa Cruz sub-area
File_Decompression_Technique: none
Transfer_Size: 16.6
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Number: ArcGIS 10.1
Format_Specification: Esri ARC/INFO ASCII GRID
Format_Information_Content:
Esri ASCII raster file containing digital elevation model of northern Monterey Bay, Soquel Cove sub-area
File_Decompression_Technique: none
Transfer_Size: 28.6
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20171211
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

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