Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2016 Title: Location of sound velocity profiles along with profile plots collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (PNG images, CSV text, ASVP text, and Esri point shapefile, GCS WGS 84). Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7P55KK3 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.5066/F7P55KK3 Online_Linkage: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data.zip Larger_Work_Citation: Citation_Information: Originator: Edward M. Sweeney Originator: Elizabeth A. Pendleton Originator: Seth D. Ackerman Originator: Brian D. Andrews Originator: Wayne E. Baldwin Originator: William W. Danforth Originator: David S. Foster Originator: E. Robert Thieler Originator: Laura L. Brothers Publication_Date: 2016 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2015, U.S. Geological Survey Field Activity 2015-001-FA Edition: 2.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7P55KK3 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7P55KK3 Description: Abstract: The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy in the fall of 2012. The U.S. Geological Survey conducted cruises during the summers of 2014 and 2015 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework that governs coastal system evolution at storm-event and longer timescales. Geophysical data collected during the cruises include swath bathymetric, sidescan sonar, chirp and boomer seismic reflection profiles, grab sample and bottom photograph data. More information about the USGS survey conducted as part of the Hurricane Sandy Response-- Geologic Framework and Coastal Vulnerability Study can be found at the project website or on the WHCMSC Field Activity Web pages: https://woodshole.er.usgs.gov/project-pages/delmarva/, https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-001-FA. Data collected during the 2014 survey can be obtained here: https://doi.org/10.5066/F7MW2F60 Purpose: This dataset is used to display the locations of sound velocity profiles (SVP) (also referred to as sound speed profiles) collected during a 2015 USGS cruise along the Delmarva Peninsula. The information contained within the sound velocity profiles is needed to adequately account for refraction artifacts that may be present within raw swath bathymetric data. This dataset contains graphs of the sound velocity profile at each station location, as well as location in Geographic Coordinate System (GCS) WGS 84 latitude and longitude, time of day and date of collection. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150610 Ending_Date: 20150714 Currentness_Reference: ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey) Status: Progress: Complete Maintenance_and_Update_Frequency: None planned. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.892477 East_Bounding_Coordinate: -75.161099 North_Bounding_Coordinate: 37.840851 South_Bounding_Coordinate: 36.999618 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: moving vessel profiler Theme_Keyword: shapefile Theme_Keyword: sound velocity profile Theme_Keyword: Brooke Ocean Moving Vessel Profiler Theme_Keyword: Esri shapefile Theme_Keyword: field activity number 2015-001-FA Theme_Keyword: MVP Theme_Keyword: SVP Theme_Keyword: SSP Theme_Keyword: sound speed profile Theme_Keyword: Marine Geology Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: location Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Ocean Place_Keyword: Delmarva Peninsula Place_Keyword: Delaware Place_Keyword: Maryland Place_Keyword: Virginia Place_Keyword: Assateague Island Place_Keyword: Assateague Island National Seashore Place_Keyword: Chincoteague Island Place_Keyword: Chincoteague National Wildlife Refuge Place_Keyword: Chincoteague Inlet Place_Keyword: Chincoteague Bay Place_Keyword: Wallops Island Place_Keyword: Parramore Island Place_Keyword: Cobb Island Place_Keyword: Wreck Island Place_Keyword: Ship Shoal Island Place_Keyword: Myrtle Island Place_Keyword: Smith Island Place_Keyword: Fisherman Island Place_Keyword: Hog Island 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 as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data_browse.jpg Browse_Graphic_File_Description: Thumbnail image of sound speed profile locations for Delmarva Peninsula. Browse_Graphic_File_Type: JPEG Cross_Reference: Citation_Information: Originator: Elizabeth A. Pendleton Originator: Seth D. Ackerman Originator: Wayne E. Baldwin Originator: William W. Danforth Originator: David S. Foster Originator: E. Robert Thieler Originator: Laura L. Brothers Publication_Date: 2015 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA Edition: 3.0 Geospatial_Data_Presentation_Form: webpage Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7MW2F60 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7MW2F60 Data_Quality_Information: Logical_Consistency_Report: Sound velocity profiles were acquired with an MVP30 Moving Vessel Profiler (MVP) from Brooke Ocean from 20150610 to 20150704 (JD 161-185) at which point the MVP30 was not recovered from cast number: MVP30_0724. The remaining sound speed profiles on 20150704 through 20150714 (JD 185 - 195) were collected with an Applied Microsystems Minos (SVP) hand-deployed velocimeter. Completeness_Report: Sound velocity profiles not associated with the patch test (904 total) collected during cruise 2015-001-FA are included in the Esri shapefile. MVP30_0384 and SVP_0886 do not exist. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Differential Global Positioning System (DGPS) and Wide Area Augmentation System (WAAS) enabled GPS navigation data were acquired during the 2015-001-FA survey using an Ashtech ProFlex 800 (ProFlex) and a Hemisphere GPS receivers, which were located on the portside of the acquisition van. Positioning data from these GPS receivers were recorded using HYPACK software version 14.0.9.47 (www.hypack.com) during the geophysical survey and positions from the Hemisphere GPS were used for MVP and SVP sound velocity deployment locations. Horizontal position accuracy is thought to be within 2 meters for WAAS enabled GPS position solutions (3 to 5 m for DGPS). However, offsets from the location of the MVP30 smart winch (which was used to deploy the MVP while underway) and the GPS antenna were not measured, and therefore the horizontal accuracy of the sound velocity profile locations is considered to be within 25 m. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: Sound Velocity Data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150610 Ending_Date: 20150714 Source_Currentness_Reference: ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey). Source_Citation_Abbreviation: raw sound velocity data Source_Contribution: Sound speed profiles were collected to correct refraction artifacts in the swath bathymetric data that can occur due to changes in the speed of sound throughout the water column. Process_Step: Process_Description: Sound velocity profiles were collected every 1-2 hours and sometimes more frequently using a Brooks Ocean Moving Vessel Profiler (MVP) (see http://www.brooke-ocean.com/mvp_main.html; for details) from 20150610 to 20150704 (JD 161-185). A computer controlled smart winch and deployment system allowed the free fall MVP fish to be deployed while the vessel was underway at a user specified time interval. The Applied Microsystems Minos SVP was used from 20150704 through 20150714 (JD 185 - 195) and deployed over the side from the aft deck of the survey vessel by hand lowering the instrument. Data from both sound velocimeters were written to a Kongsberg SIS format ASCII file (.asvp). The ASVP files from the SVP were manually edited in a text editor to remove the up-cast data collection and to amend the number of data points the ASVP header. The MVP was set to only collect data on the down-cast. Process_Date: 20150714 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Wayne E. Baldwin Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist 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 x2226 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Process_Step: Process_Description: A Python script was used to read the ASVP data and plot the sound speed profile as speed of sound (meter/second) versus depth (meters). Position, Date, Time, and Profile ID were pulled from the ASVP header and written into the image (PNG) for reference. Within the same script, the Position, Julian day, Time, and Profile ID were also imported to a spatially enabled SQLite (version 3.7.9) + Spatialite (version 3.0.1) relational database using the pyspatialite interface. The geographic positions were used to create point geometries for the station locations, and additional fields indicating survey ID, vessel ID, and device ID were added. Process_Date: 20150714 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Wayne E. Baldwin Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist 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 x2226 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Process_Step: Process_Description: The Geospatial Data Abstraction Library / OGR Simple Features Library (GDAL/OGR) unix executable OGR2OGR was used to export the MVP and SVP station locations, station number (equivalent to Profile ID), Julian day, date, time, survey ID, vessel ID, and device ID from the relational database to an Esri point shapefile in Geographic Coordinate System (GCS, latitude and longitude) WGS 84. Process_Date: 20150714 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Wayne E. Baldwin Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist 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 x2226 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Process_Step: Process_Description: The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. Process_Date: 20170419 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: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 904 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: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2015-001-FA_MVP-SVP_data Entity_Type_Definition: SOund velocity locations for survey 2015-001-FA along the Delmarva Peninsula. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Lon Attribute_Definition: Decimal degree longitude value in GCS WGS 84. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -75.892477 Range_Domain_Maximum: -75.161099 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: .00001 Attribute: Attribute_Label: Lat Attribute_Definition: Decimal degree latitude value in GCS WGS 84. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 36.999618 Range_Domain_Maximum: 37.840851 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: .00001 Attribute: Attribute_Label: MVP Attribute_Definition: Name of velocity profile used to distinguish between casts. Profile names beginning with 'MVP30' refer to the MVP30 moving vessel profiler casts (and are followed by cast number - 002 to 724) and profiles beginning with 'SVP' refer to the Applied Microsystems Minos sound velocity profile casts (and are followed by cast number - 725 to 906). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: Date Attribute_Definition: Month/Day/Year when the MVP/SVP cast was collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JD_UTC Attribute_Definition: Julian day and UTC time when the MVP/SVP cast was collected in the format: JD:HH:MM; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: SurveyID Attribute_Definition: WHCMSC field activity identifier (e.g. "2015-001-FA" where 2015 is the survey year, 001 is survey number of that year, and FA is Field Activity). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: VehicleID Attribute_Definition: Survey vessel name. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: DeviceID Attribute_Definition: Device used to collect sound speed profile data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Overview_Description: Entity_and_Attribute_Overview: The PNG images can be hyperlinked to their shapefile location in ArcGIS. The graphs show depth on the y-axis and speed of sound on the x-axis. The format of the ASVP files is as follows: Heading: SoundVelocity (file type), 1.00 (file format version number), cast number in filename (XXX), date/time of file creation ( YYYYMMDDhhmm), latitude (decimal degrees), longitude (decimal degrees), radii around the lat/long position for which the profile is valid (set to 1 meter), date of profile start ( YYYYMMDDhhmm), date of profile stop ( YYYYMMDDhhmm), source instrument of the profile (MVP P or SmartProbe P where P stands for Probe), number of values in the profile, which is followed by column data of depth (meters) and speed of sound (meters per second). The CSV file contains the following columns of data: castnum, Lon, Lat, date, JD_UTC, which correspond to the attributes of the same name in the shapefile. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Resource_Description: USGS data release 2015-001-FA MVP/SVP data from the Delmarva Peninsula area (2015-001-FA_MVP-SVP_data.zip). The zip file contains the following shapefile: 2015-001-FA_MVP-SVP_data.shp, a CSV file that was used to create the shapefile (2015-001-FA_MVP-SVP_data.csv), a folder (mvp-svp_images) containing 904 PNG images that represent all sound velocity profiles graphically, a folder (mvp-svp_asvp) containing 904 .asvp ASCII files that represent all sound velocity profiles, a browse graphic (2015-001-FA_MVP-SVP_data_browse.jpg) and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2015-001-FA_MVP-SVP_data.xml) in four standard formats are also included in the zip file. Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile Format_Version_Number: Spatialite 3.0.1 Format_Specification: Shapefile Format_Information_Content: The WinZip (version 14.0) file contains a shapefile of MVP and SVP sample locations collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 38 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data.zip Network_Resource_Name: https://doi.org/10.5066/F7P55KK3 Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Access_Instructions: Data can be downloaded via the Internet Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: Microsoft Excel Version 2010 Format_Specification: Comma-Separated Values (CSV) Format_Information_Content: The WinZip (version 14.0) file contains a CSV of MVP and SVP sample locations collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 38 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data.zip Network_Resource_Name: https://doi.org/10.5066/F7P55KK3 Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Access_Instructions: Data can be downloaded via the Internet Digital_Form: Digital_Transfer_Information: Format_Name: ASVP Format_Version_Number: 1.0 Format_Specification: Kongsberg ASCII file format (ASVP) Format_Information_Content: The WinZip (version 14.0) file contains ASVP text files of MVP and SVP sound speed profile data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 38 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data.zip Network_Resource_Name: https://doi.org/10.5066/F7P55KK3 Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Access_Instructions: Data can be downloaded via the Internet Digital_Form: Digital_Transfer_Information: Format_Name: PNG Format_Version_Number: ImageMagick (version 6.6.1) Format_Specification: Portable Network Graphic (PNG) Format_Information_Content: The WinZip (version 14.0) file contains sound speed profile images of MVP and SVP data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 38 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/mvp-svp/2015-001-FA_MVP-SVP_data.zip Network_Resource_Name: https://doi.org/10.5066/F7P55KK3 Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Access_Instructions: Data can be downloaded via the Internet Fees: none Technical_Prerequisites: This zip file contains data available in shapefile, CSV, ASVP and PNG formats. The user must have software capable of reading shapefile format to use these data. The CSV and ASVP files can be read with a text editor. PNG files can be viewed with any PNG image viewing software. The zip files must be uncompressed in order to view the images. Metadata_Reference_Information: Metadata_Date: 20170419 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time