Metadata: Identification_Information: Citation: Citation_Information: Originator: Jin-Si R. Over Originator: Peter A. Traykovski Publication_Date: 20230725 Title: Bathymetric data and grid of offshore Marconi Beach, Wellfleet, MA on March 20, 2023 Edition: 1.0 Geospatial_Data_Presentation_Form: raster and tabular data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P99ST3LT Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P99ST3LT Online_Linkage: https://www.sciencebase.gov/catalog/item/648b6c33d34ef77fcafe68fc Larger_Work_Citation: Citation_Information: Originator: Jin-Si R. Over Originator: Chris R. Sherwood Originator: Peter A. Traykovski Publication_Date: 2023 Title: Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Marconi Beach, Wellfleet, Massachusetts in March 2023, U.S. Geological Survey Field Activity 2023-012-FA. Edition: 1.0 Geospatial_Data_Presentation_Form: digital files Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P99ST3LT Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Over, J.R., Sherwood, C.R., and Traykovski, P.A., 2023, Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Marconi Beach, Wellfleet, Massachusetts in March 2023, U.S. Geological Survey Field Activity 2023-012-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P99ST3LT. Online_Linkage: https://doi.org/10.5066/P99ST3LT Online_Linkage: https://www.sciencebase.gov/catalog/item/648b539cd34ef77fcafe6850 Description: Abstract: The data in this release re-map the beach and nearshore environment at Marconi Beach in Wellfleet, MA and provide updated environmental context for the 2021 CoastCam installation that looks out at the coast shared by beachgoers, shorebirds, seals, and sharks. This is related to the field activity 2022-014-FA and a collaboration with the National Park Service at Cape Cod National Seashore to monitor the region that falls within the field of view of CoastCam CACO-02, which are two video cameras aimed at the beach. In March 2023, U.S. Geological Survey and Woods Hole Oceanographic Institute (WHOI) scientists conducted field surveys to collect topographic and bathymetric data. Images of the beach for use in structure-from-motion were taken with a camera (SONY a6000) and a post-processed kinematic (PPK) system attached to a helium powered balloon-kite (Helikite). High-precision GPS targets (AeroPoints) and numbered black and white tarps were used as ground control points. Bathymetry was collected in the nearshore using a single-beam echosounder mounted on a surf capable self-righting electric autonomous surface vehicle. Agisoft Metashape (v. 1.8.1) was used to create a digital surface model and orthomosaic with the collected imagery. Purpose: These data may be used as a high-resolution bathymetry dataset of Marconi Beach to observe conditions and change over time and to validate the CoastCam. Supplemental_Information: For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-012-FA. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20230320 Currentness_Reference: ground condition; one day of data collection on March 20, 2023 Status: Progress: Complete Maintenance_and_Update_Frequency: Not planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -69.96365821 East_Bounding_Coordinate: -69.95115619 North_Bounding_Coordinate: 41.89914391 South_Bounding_Coordinate: 41.89078259 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: shoreline Theme_Keyword: autonomous surface vehicle Theme_Keyword: Woods Hole Oceanographic Institution Theme_Keyword: WHOI Theme_Keyword: ASV Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: National Seashore Theme_Keyword: single-beam echo sounder Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: remote sensing Theme_Keyword: single-beam echo sounder Theme_Keyword: bathymetry Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: location Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:648b6c33d34ef77fcafe68fc Place: Place_Keyword_Thesaurus: Common geographic areas Place_Keyword: United States Place_Keyword: Massachusetts Place_Keyword: Wellfleet Place_Keyword: Cape Cod Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Marconi Beach Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jin-Si R. Over Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2297 Contact_Electronic_Mail_Address: jover@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/648b6c33d34ef77fcafe68fc?name=2023-012-FA_Marconi_bathymetry_browse.JPG&allowOpen=true Browse_Graphic_File_Description: Elevation relative to NAVD88-colored image of bathymetry Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Matlab v. 2020b, Emlid Studio v.1.4 Cross_Reference: Citation_Information: Originator: Jin-Si R. Over Originator: Chris R. Sherwood Originator: Peter A. Traykovski Originator: Marie K. Bartlett Publication_Date: 2022 Title: Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Marconi Beach, Wellfleet, MA in March 2022, U.S. Geological Survey Field Activity 2022-014-FA Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9L1KCQB Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication is the latest survey data of Marconi Beach from 2022. Online_Linkage: https://doi.org/10.5066/P9L1KCQB Cross_Reference: Citation_Information: Originator: Jin-Si R. Over Originator: Chris R. Sherwood Originator: Peter A. Traykovski Originator: Eric E. Marsjanik Publication_Date: 2021 Title: Topographic and bathymetric data, sediment samples, structure from motion imagery, and reference mark data collected at Marconi Beach, Wellfleet in winter 2021, U.S Geological Survey Field Activity 2021-022-FA Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9POZ9VH Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication is the survey data of Marconi Beach from 2021. Online_Linkage: https://doi.org/10.5066/P9POZ9VH Cross_Reference: Citation_Information: Originator: Holly Francis Originator: Peter A. Traykovski Publication_Date: 2021 Title: Development of a highly portable unmanned surface vehicle for surf zone bathymetric surveying Series_Information: Series_Name: Journal of Coastal Research Issue_Identification: DOI:10.2112/JCOASTRES-D-20-00143.1 Publication_Information: Publication_Place: online Publisher: Allen Press Other_Citation_Details: Volume 37, Issue 5, p. 933-945, this publication describes the theory behind attaching and processing data from a single beam echosounder attached to an autonomous survey vehicle. Online_Linkage: https://doi.org/10.2112/JCOASTRES-D-20-00143.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No official quality control (QC) test was performed, but all depth values are internally consistent in relation to each other and are comparable to values of published bathymetry in the area (see Over and others, 2021;2022). The product is interpolated and small-scale bathymetry features are not resolved. The actual vertical position may be much less accurate between tracklines. Yaw, pitch, and roll, are not taken into account due to the wide beamwidth, for more processing information see Francis and Traykovski, (2021). Logical_Consistency_Report: The raster file represents single beam echo-sounder bathymetry data collected by Peter Traykovski (WHOI). These data are a combination of post-processed kinematic (PPK) elevations collected using a GNSS receiver (EMLID Reach M2) and soundings from a Cerulean s500 single beam echosounder mounted on a self-righting autonomous surface vehicle. PPK data was corrected to an onshore base station (JAVA Triumph). The GNSS antenna is offset from the echo-sounder by 0.25 m (referred to as Antenna_Z_Offset), and this is taken into account when calculating the depth in the trackline and echosounder variables (see Processing Steps). Completeness_Report: Collected data were edited for erroneous soundings before being incorporated into the final bathymetric grid, the mask prevents extrapolation of data beyond the bounds but does not exclude any data. The CSV of raw PPK and echosounder values have been edited to remove returns at the beginning and end of the survey when the Autonomous Surface Vehicle (ASV) was on land. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation information was acquired from the GNSS receiver in PPK mode with a multi-band GNSS antenna that has a theoretical horizontal accuracy of 1-5 cm and average reported xy standard deviation (SD) of 4.2 cm. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The location information was acquired from the GNSS receiver in PPK mode with a multi-band GNSS antenna with a theoretical horizontal accuracy of 1-5 cm and average reported z SD of 5.5 cm. The navigational accuracies do not represent the accuracy of the derived bathymetric soundings. The vertical accuracy of the raw data in water depths of 10 meters or less, based on industry standard system specifications for 450 and 500 kHz transmit frequencies, is 5-10 cm. Individual point errors (20-30% of points) due to extreme movement of the ASV could be as high as 10 cm, but process steps to interpolate and fit the raster remove a large portion of varaibility. Lineage: Process_Step: Process_Description: The single-beam bathymetry data were collected by launching the ASV Yellowfin into the water from the surf zone. Yellowfin is equipped with a Cerulean s500 echosounder and collects singe-beam data and has an EMLID Reach M2 GPS for positioning data. The boat was controlled near the shore by Peter Traykovski and put on auto-pilot using predetermined tracklines for longer transects offshore. A base station was set-up on reference mark MAR RM1 for the duration of the survey. The raw bathymetry data was processed with the following steps: 1.Parsed the echosounder data (NMEA GPS Puck, Time, and Echosounder range) into MATLAB (v. 2020b) using MATLAB Scripts developed by Peter Traykovski at WHOI - see contact below 2. Post Processed Kinematic (PPK) GNSS data from the ASV was corrected using the base station (Java Triumph-1) data in Emlid Studio (Version 1.4) using the datum NAD83(2011) and then Geoid 18 for the vertical datum NAVD88. A projection for UTM Zone 19N was also specified to get the Easting and Northing information. 3. Refined time alignment to account for any small time delays between GPS data and echosounder data collection. This is accomplished using the time lagged cross correlation of echosounder range and PPK GNSS altitude in locations with a relatively flat bottom. The resulting time shift was 36 seconds. The GPS measures vertical fluctuation of the boat due to waves and these fluctuations are also visible in echosounder data. Outliers in the eachosunder data were removed using a despiking function. The equation in Step 5 removes the vertical fluctuation due to waves from the echosounder data leaving only true bathymetry if GPS and the echosounder are well synced. The lagged cross correlation processing ensures they are synced optimally. 4. The PPK GNSS elevation (GPS_z) positions (collected at a higher frequency than the echosounder) were interpolated to the time of echosounder samples (Echo_z) with the MATLAB function interp1 (linear interpolation). These interpolated data are available in 2023012FA_Marconi_raw_bathymetry.csv 5. Calculated sea floor elevation with reference to the NAVD88 datum in meters using the following equation: Seafloor_z = -Echo_z + GPS_z - Antenna_Z_Offset; Antenna_Z_Offset = 0.25 m was the offset from the GNSS antenna to the echosounder transducer on the z-axis of the ASV. 7. Gridded Seafloor_z values onto 1 m resolution UTM eastings, northings using MATLAB file exchange script regularizedata3d by Jamal (2020), a cubic interpolation with the optimum smoothness coefficient determined by a Monte Carlo optimization procedure for the data regularization. Regularizedata3d entailed removing one cross-shore line of data from the processing and adjusting the smoothness parameter so the overall surface fit best fits the removed data. The process was then repeated for all the lines of data. The optimized smoothing parameter was used with all the data for the final processing. 8. The MATLAB function 'roipoly' returned the mask as a binary image, which sets pixels inside the region of interest (ROI) to 1 and pixels outside the ROI to 0. The boundary was developed so that there were no extrapolated bathymetry data outside the tracklines. The masks extent was the convex hull of the tracklines positions (x,y) and a bounding z coordinate of 0.3 represented the surface in reference to NAVD88 in meters. 9. Exported gridded 1 m data in NAD83(2011)/UTM Zone 19N in NAVD88 meters as a GeoTIFF: 2023012_Marconi_bathymetry_UTM19N_NAVD88_1m.tif. Note that using NAVD88 as a height, means that the depths are not true depths but the elevation of the seafloor above or below the geoid. Jamal (2020). RegularizeData3D (https://www.mathworks.com/matlabcentral/fileexchange/46223-regularizedata3d), MATLAB Central File Exchange. Retrieved September 23, 2020. Process_Date: 202304 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Traykovski Contact_Organization: Woods Hole Oceanographic Institution Contact_Position: Associate Scientist Contact_Address: Address_Type: mailing and physical address Address: 226 Woods Hole Rd, MS #12 City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-289-2638 Contact_Electronic_Mail_Address: ptraykovski@whoi.edu Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 19 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -69.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.001 Ordinate_Resolution: 0.001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 (National Spatial Reference System 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: 2023012FA_Marconi_bathymetry_UTM19N_NAVD88_1m.tif Entity_Type_Definition: The GeoTIFF is the interpolated grid of the raw soundings representing the bathymetry of offshore Marconi Beach on March 20, 2023. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Value Attribute_Definition: Seafloor elevation orthometric height NAVD88 (m) using Geoid 18 in NAD83(2011)/UTM Zone 19N Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -14.039 Range_Domain_Maximum: -0.0139 Attribute_Units_of_Measure: meters Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: -3.40282001837565e40 Enumerated_Domain_Value_Definition: No data Enumerated_Domain_Value_Definition_Source: Producer-defined Detailed_Description: Entity_Type: Entity_Type_Label: 2023012FA_Marconi_raw_bathymetry.csv Entity_Type_Definition: The CSV file contains 47,992 data records of the processed unsmoothed s500 sonar data with interpolated PPK GNSS positions. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FAN Attribute_Definition: USGS Field Activity Number Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2023-012-FA Enumerated_Domain_Value_Definition: USGS year, ID, and Field Activity Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Latitude NAD83[2011] Attribute_Definition: Post-processed latitude of ASV GNSS antenna position of each data point. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.890902 Range_Domain_Maximum: 41.89903 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude NAD83[2011] Attribute_Definition: Post-processed longitude of ASV GNSS antenna position of each data point. Attribute_Definition_Source: None Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -69.963523 Range_Domain_Maximum: -69.951277 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Ellipsoid height NAD83[2011] Attribute_Definition: Post-processed height in meters of ASV GNSS antenna position of each data point based on the NAD83(2011) reference ellipsoid. Attribute_Definition_Source: None Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -27.364 Range_Domain_Maximum: -26.010 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Northing 19N Attribute_Definition: Post-processed X-coordinate of ASV GNSS antenna position of each data point in NAD83(2011)/UTM Zone 19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4638109.222 Range_Domain_Maximum: 4639004.678 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Easting 19N Attribute_Definition: Post-processed Y-coordinate of ASV GNSS antenna position of each data point, in NAD83(2011)/UTM Zone 19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 420073.438 Range_Domain_Maximum: 421085.537 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: GPS_z Attribute_Definition: Post-processed Z-coordinate of ASV GNSS antenna position of each data point using NAVD88 correction with Geoid 18. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.436 Range_Domain_Maximum: 1.790 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Echo_z Attribute_Definition: The unsmoothed Cerulean s500 bed detection range, or the distance between the echosounder and the bottom. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.100 Range_Domain_Maximum: 15.923 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Echo_z Attribute_Definition: Elevation in meters of the seafloor in NAVD88, calculated using Seafloor_z = -Echo_z + GPS_z - Antenna_Z_Offset. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -15.06 Range_Domain_Maximum: -0.332 Attribute_Units_of_Measure: meters Overview_Description: Entity_and_Attribute_Overview: GeoTIFF raster has 1028 columns and 918 rows. Data from the GPS positions and echosounder data are the basis for the raster. Entity_and_Attribute_Detail_Citation: USGS Field Activity 2023-012-FA Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: GeoTIFF 2023012FA_Marconi_bathymetry_UTM19N_NAVD88_1m.tif is a grid of bathymetric data and then the raw GPS and echosounder data as a CSV file (2023012FA_Marconi_raw_bathymetry.csv). 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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 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 for other purposes, nor on all computer systems, 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Version_Number: 1.0.0 Format_Specification: 32-bit floating point GeoTIFF format File_Decompression_Technique: LZW compression Transfer_Size: 3.23 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/648b6c33d34ef77fcafe68fc Network_Resource_Name: https://www.sciencebase.gov/catalog/item/648b6c33d34ef77fcafe68fc Network_Resource_Name: https://doi.org/10.5066/P9L1KCQB Access_Instructions: The first link in the list above is to directly download all the data on the page, the second link is to the page to download files individually, and the third link is the doi to the main publication. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: Exported from Excel Office 365 16.01 Format_Information_Content: The CSV file contains raw GPS trackline and echosounder data. Transfer_Size: 3.83 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/648b6c33d34ef77fcafe68fc Network_Resource_Name: https://www.sciencebase.gov/catalog/item/648b6c33d34ef77fcafe68fc Network_Resource_Name: https://doi.org/10.5066/P9L1KCQB Access_Instructions: The first link in the list above is to directly download all the data on the page, the second link is to the page to download files individually, and the third link is the doi to the main publication. Fees: none Technical_Prerequisites: These data are available as a 32-bit floating point GeoTIFF image. To utilize these data, the user must have an image viewer, image processing, GIS software package capable of importing a GeoTIFF image. Metadata_Reference_Information: Metadata_Date: 20230725 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jin-Si R. Over Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical Address: U.S. Geological Survey Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2297 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time