5 meter ArcRaster grid of swath bathymetry of inshore area of Cape Ann - Salisbury Beach Massachusetts survey area (BATH_IS5m, UTM Zone 19, WGS84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2008
Title:
5 meter ArcRaster grid of swath bathymetry of inshore area of Cape Ann - Salisbury Beach Massachusetts survey area (BATH_IS5m, UTM Zone 19, WGS84)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2007-1373
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/10.3133/ofr20071373
Online_Linkage: https://pubs.usgs.gov/of/2007/1373/html/appendix1.html
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Walter A. Barnhardt
Originator: Brian D. Andrews
Originator: Seth D. Ackerman
Originator: Wayne E. Baldwin
Originator: Christopher J. Hein
Publication_Date: 2008
Title:
High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts.
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2007-1373
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2007/1373/
Description:
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center. Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine reserves, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports<http://woodshole.er.usgs.gov/project-pages/coastal_mass/>. This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. They were collected in two separate surveys in 2004 and 2005 and cover approximately 325 square kilometers of the inner continental shelf. High resolution bathymetry and backscatter intensity were collected in 2004 and 2005. Seismic profile data, sediment samples and bottom photography were also collected in 2005.
Purpose:
The purpose of these data is to establish high-resolution acoustic depth measurements of the seafloor for regional geologic framework investigations. These data cover 69 square kilometers of the near shore survey area between Cape Ann and Salisbury Beach, Massachusetts, in depths between 2m and 30m.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050908
Ending_Date: 20050916
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.811735
East_Bounding_Coordinate: -70.650661
North_Bounding_Coordinate: 42.864755
South_Bounding_Coordinate: 42.660515
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:45fe048c-4a6c-46c7-8fa8-a3b5980e1be4
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: Woods Hole Science Center
Theme_Keyword: WHSC
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor
Theme_Keyword: Marine Geology
Theme_Keyword: SEA SwathPlus
Theme_Keyword: Swath Bathymetry
Theme_Keyword: Interferometric Sonar
Theme_Keyword: ArcGIS Raster
Theme_Keyword: field activity serial number 05005
Theme_Keyword: R/V Connecticut
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: bathymetry and elevation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: interferometric sonar
Theme_Keyword: bathymetry measurement
Theme_Keyword: bathymetry
Theme_Keyword: marine geophysics
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Atlantic Ocean
Place_Keyword: Gulf of Maine
Place_Keyword: Bigelow Bight
Place_Keyword: Merrimack River
Place_Keyword: Ipswich Bay
Place_Keyword: Massachusetts
Place_Keyword: Cape Ann
Place_Keyword: Salisbury Beach
Place_Keyword: Plum Island
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Seafloor
Stratum_Keyword: sea floor
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2005
Access_Constraints: None
Use_Constraints:
Intended scale of data is 1:25,000. Data are not intended for navigational use. 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: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2007/1373/GIS/browse_jpg/bath_is5m.jpg
Browse_Graphic_File_Description: black and white thumbnail image of bathymetry.
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
Cross_Reference:
Citation_Information:
Originator: Walter A. Barnhardt
Originator: Brian D. Andrews
Originator: Bradford Butman
Publication_Date: 2006
Title:
High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1293
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2005/1293/
Cross_Reference:
Citation_Information:
Originator: Seth D. Ackerman
Originator: Bradford Butman
Originator: Walter A. Barnhardt
Originator: William W. Danforth
Originator: James M. Crocker
Publication_Date: 2006
Title:
High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1008
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2006/1008/
Data_Quality_Information:
Logical_Consistency_Report: Information unavailable from original metadata.
Completeness_Report:
Soundings were processed and edited using CARIS HIPS (ver 6.1). Although the soundings were manually edited, small data spikes may exist at outer edges of some swaths. In addition, small gaps between adjacent survey lines may exist in depth less than 14 meters. Swath bathymetry was collected along additional offshore tie-lines for use with the seismic profiles and for cross-track depth comparison. Bathymetric data collected on these offshore tie lines are not included in this grid.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated using Real-Time Kinematic Global Positioning System (RTK-GPS) which provides horizontal positional accuracies (x and y) on the decimeter scale (http://www.noaa.gov; http://www.nos.noaa.gov; http://www.ngs.noaa.gov).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy of the acquisition system may approximate 1% of water depth, 0.1-0.3 meters within the survey area. However, overall vertical accuracies of <= 0.5 m are assumed based on the following considerations. Ship motion was recorded with a TSS DMS 2-05 and used to correct for heave, pitch, roll and yaw. RTK-GPS was used to establish water-level heights relative to Mean Lower Low Water (MLLW), providing decimeter-scale accuracies. Refraction artifacts were minimized by acquiring a range of sound velocity profiles throughout the survey area to model the sound velocity structure of the water column. Fluctuations in the vessel draft due to fuel and water usage were not determined.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Information unavailable from original metadata.
Publication_Date: unpublished material
Title: Raw data collected for field activitie 2005-005-FA
Other_Citation_Details:
The source citation information is inferred from other information in the metadata and was not part of the original metadata file. Source time period of content was inferred from the time period of the dataset.
Type_of_Source_Media: Information unavailable from original metadata.
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050908
Ending_Date: 20050908
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: raw data
Source_Contribution:
System Setup and Operation: The Systems Engineering and Assessment (SEA) Ltd. SwathPlus bathymetric sonar was configured in a rigid pole-mount and deployed from the starboard side of the R/V Connecticut. A TSS DMS 2-05 motion sensor was mounted directly above and in-line with the transducers. An RTK-GPS antenna was mounted adjacent to the rigid-pole mount. Horizontal (x and y) and vertical (z) offsets between the transducers and motion sensor and antenna and motion sensor were precisely measured and recorded within the SwathPlus acquisition software (SEA Swath Processor (2005)). These offsets are used to establish the motion sensor as the common reference point for data acquisition. Additionally, the depth of the transducers below the water surface was measured and recorded within the SEA Swath Processor acquisition software. This depth was used to derive the speed of profile and acoustic ray path based on speed of sound profiles collected within the survey area. An Applied Microsystems SV Plus sound velocity profiler was used to collect speed of sound profiles at forty-two stations. A patch test was conducted at the beginning of the survey in order to measure roll angle offsets. Roll angle offsets can have a strong effect on the accuracy of depth measurements. (The roll angle offset is the difference between the motion sensor vertical measurement and the nominal mount angle of the transducers (30 degrees)). The calculated roll angle offsets were stored within the SEA Swath Processor acquisition software. Navigation: The USGS established a Real-Time Kinematic Global Positioning System (RTK-GPS) that provided horizontal (x and y) and vertical (z) positioning during the survey. The RTK-corrected GPS signal was sent to the ship once every second from a base station positioned on the roof of the Air Force Antenna Station (USAF/AFRC/SNHA) in Ipswich, Massachusetts. Shipboard navigation data (x, y, and z) were stored in Hypack, Inc. Hydrographic Survey Software (http://www.hypack.com) raw data files and used for positioning of geophysical instrumentation. The offset between orthometric (NAVD88) and local chart datum (MLLW) as reported at the NOAA Tidal Station #8440452, Parker River National Wildlife Refuge, was applied to the RTK signal. This allows for elevations (z) received at the shipboard RTK antenna to be referenced to Mean Lower Low Water (MLLW) (that is, elevations are stored as distance of the RTK antenna above MLLW). During post-processing, the distance of the RTK antenna above the water-line is removed from the stored RTK elevations. The resulting value is then applied to the bathymetric soundings, yielding data referenced to MLLW.
Process_Step:
Process_Description:
Tidal correction: Depths were corrected to mean lower low water (MLLW) using 1 second RTK-GPS heights of the GPS receiver mounted over the SwathPlus sonar head. These heights were extracted from each Hypack navigation file using the AWK script "DoRTK1" and smoothed in MatLab (ver. 7.1.0.183 R14) using a third order polynomial. The smoothed 1 second heights were averaged to 1 minute heights and formatted for input to Swath Processor using the AWK script "DoRTK2" . This text file was then inserted in the tide table in the SEA Swath Processor file (*.sxs) for merging with the SwathPlus Raw (*.sxr) file.
Process_Date: 200804
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Process_Step:
Process_Description:
Raw to Processed Conversion: Each raw SwathPlus bathymetric sonar file (*.sxr) was converted to a SwathPlus processed file (*.sxp) using SEA Swath Processor (ver. 3.05.92). During the conversion process, sound velocity profiles were used to minimize potential refraction artifacts from fluctuations in the speed of sound within the water column. Various bathymetric filters were applied such as range and nadir to eliminate outliers. During this conversion process the tidal information from the previous process step was merged into the new processed file (*.sxp).
Process_Date: 200804
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Process_Step:
Process_Description:
CARIS Processing: A new CARIS HIPS project (ver. 6.1) was created with projection information set to Universal Transverse Mercator (UTM) Zone 19, WGS84. Each SwathPlus processed file (*.sxp) was imported to the new CARIS project using the Import/Conversion Wizard. A 5 meter resolution Bathymetric and Statistical Error (BASE) Surface was created from the files for each Julian day. The Base surface for each day was reviewed for any inconsistencies, or anomalies. Filters were applied to each line including beam to beam slopes and across track angle = 6.0 degrees. The CARIS refraction editor was used to adjust the speed of sound in some cases to flatten out the depth profiles produced by local differences in speed of sound.
Process_Date: 200804
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Process_Step:
Process_Description:
CARIS to ESRI Conversion: The CARIS HIPS BASE surface was converted to an ArcGIS 32-bit floating point raster grid in a three step process. First, the CARIS BASE surface was imported to Interactive Visualization Systems (IVS) Data Magician (DMagic ver. 6.5.1) .dtm and .geo format. Second, the DMagic file was exported to an ASCII Raster format with ESRI header. Finally the third step imported the ASCII raster file into an ArcGIS 32-bit floating point raster grid (bath_is5m) using the ArcToolbox (ArcGIS ver. 9.2) Conversion Tools-"ASCII to Raster Tool".
Process_Date: 200804
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Process_Step:
Process_Description:
Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. This file had a source contribution, but no source citation information. This information was populated based on information in the source contribution. The distribution format was edited from zip to AIG, based on information contained in the last original process step. AIG indicates Arc/Info Binary Grid. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
Process_Date: 20151105
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
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
Process_Date: 20170214
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description: Crossref DOI link was added as the first link in the metadata.
Process_Date: 20191118
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
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200908
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: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 4484
Column_Count: 2544
Vertical_Count: 1
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: 5.001966
Ordinate_Resolution: 5.001966
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: mean lower low water
Altitude_Resolution: 0.1
Altitude_Distance_Units: meters
Altitude_Encoding_Method: attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Value
Entity_Type_Definition: Depth in meters below mean lower low water
Entity_Type_Definition_Source: ESRI
Attribute:
Attribute_Label: Information unavailable from original metadata.
Attribute_Definition: Information unavailable from original metadata.
Attribute_Definition_Source: Information unavailable from original metadata.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -2.5
Range_Domain_Maximum: -28.8
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
Swath bathymetry in ESRI ArcRaster format. Data values represent depth in meters referenced to mean lower low water (MLLW).
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey, Woods Hole 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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Resource_Description: Downloadable Data
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: AIG
Format_Version_Number: 9.0
Format_Specification: ESRI Raster GRID format
Format_Information_Content:
WinZip file containing the ArcRaster grid of swath bathymetric data collected in the near shore survey area of the Cape Ann to Salisbury Beach Survey Area.
File_Decompression_Technique: WinZip
Transfer_Size: 6.2
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
Offline_Option:
Offline_Media: DVD-ROM
Recording_Capacity:
Recording_Density: 4.75
Recording_Density_Units: Gbytes
Recording_Format: UDF
Compatibility_Information: None
Fees: None
Technical_Prerequisites:
These data are available as a ArcInfo 32-bit floating point binary grid in Environmental Systems Research Institute (ESRI) format. The grid consists of two folders, one with the "grid name", and one "info" folder. The two folders for each grid are compressed into one file using WinZip (ver. 9.0) software. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an ESRI ArcRaster grid. The two folders for each grid must be uncompressed to the same folder. If during the process of extracting multiple grids in WinZip format to the same folder, the user is prompted by WinZip software to "overwrite existing files" in the info folder select the "yes" option.
Metadata_Reference_Information:
Metadata_Date: 20200908
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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