Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2018 Title: Multibeam backscatter data collected within Lake Powell, UT-AZ during USGS Field Activity 2017-049-FA, using a dual-head Reson T20-P multibeam echosounder (8-bit GeoTIFF, UTM Zone 12N, WGS 84, 2 meter resolution) Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P90BU2VS 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/P90BU2VS Online_Linkage: https://www.sciencebase.gov/catalog/item/5ba3cc6de4b08583a5c81bbf Larger_Work_Citation: Citation_Information: Originator: Brian D. Andrews Originator: Wayne E. Baldwin Originator: Charles R. Worley Originator: Robert L. Baskin Originator: Jane F. Denny Originator: David S. Foster Originator: Barry J. Irwin Originator: Eric M. Moore Originator: Alex R. Nichols Publication_Date: 2018 Title: High-resolution geophysical data collected in Lake Powell Utah-Arizona, U.S. Geological Survey Field Activity 2017-049-FA Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P90BU2VS Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Andrews, B.D., Baldwin, W.E., Worley, C.R., Baskin, R.L., Denny, J.F., Foster, D.S., Irwin, B.J., Moore, E.M., and Nichols, A.R., 2018, High-resolution geophysical data collected in Lake Powell, Utah-Arizona, U.S. Geological Survey Field Activity 2017-049-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P90BU2VS. Online_Linkage: https://doi.org/10.5066/P90BU2VS Online_Linkage: https://www.sciencebase.gov/catalog/item/5b900656e4b0702d0e807395 Description: Abstract: High-resolution geophysical mapping of Lake Powell in the Glen Canyon National Recreation Area in Utah and Arizona was conducted between October 8 and November 15, 2017, as part of a collaborative effort between the U.S. Geological Survey and the Bureau of Reclamation to provide high-quality data needed to reassess the area-capacity tables for the Lake Powell reservoir. Seismic data collected during this survey can help to define the rates of deposition within the San Juan and Colorado Rivers, which are the main inflows to Lake Powell. These new data are intended to improve water budget management decisions that affect the natural and recreational resources of the reservoir. Multibeam echosounder bathymetry and backscatter data were collected along 2,312 kilometers of tracklines (331 square kilometers) of the lake floor to regionally define its depth and morphology, as well as the character and distribution of lake-floor sediments. Ninety-two kilometers of seismic-reflection profile data were also collected to define the thickness and structure of sediment deposits near the confluences of the San Juan and Colorado Rivers. Purpose: This multibeam backscatter mosaic of Lake Powell will be used in conjunction with other geophysical and sample data to investigate the morphology and geologic framework of the lake bed. Supplemental_Information: The elevation of the lake surface during the time of the survey was approximately 1081 meters (WGS ellipsoidal heights), or 1107 meters, (NAVD88) as measured by the Applanix Wavemaster DGPS on the R/V Stephens. Additional information on the field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-049-FA. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20171008 Ending_Date: 20171115 Currentness_Reference: data were collected on the following dates: 20171008-20171022 (Julian day 281-295); 20171024-20171109 (Julian day 297-313); 20171115 (Julian day (319). Status: Progress: Complete Maintenance_and_Update_Frequency: None planned. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -111.5601 East_Bounding_Coordinate: -110.3892 North_Bounding_Coordinate: 37.84101 South_Bounding_Coordinate: 36.89187 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5ba3cc6de4b08583a5c81bbf 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: Utah Water Science Center Theme_Keyword: UWSC Theme_Keyword: Bureau of Reclamation Theme_Keyword: BOR Theme_Keyword: National Park Service Theme_Keyword: NPS Theme_Keyword: Department of the Interior Theme_Keyword: DOI Theme_Keyword: Colorado River Storage Project Theme_Keyword: CRSP Theme_Keyword: field activity number 2017-049-FA Theme_Keyword: R/V Stephens Theme_Keyword: GeoTIFF Theme_Keyword: multibeam echosounder Theme_Keyword: multibeam backscatter Theme_Keyword: T20-P Theme_Keyword: backscatter Theme_Keyword: time-series Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: inlandWaters Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: multibeam sonar Theme_Keyword: lakebed characteristics Theme_Keyword: lakebed acoustic reflectivity Theme_Keyword: geophysics Theme_Keyword: geology Theme_Keyword: geospatial datasets Place: Place_Keyword_Thesaurus: None Place_Keyword: United States of America Place_Keyword: State of Utah Place_Keyword: State of Arizona Place_Keyword: Garfield County Place_Keyword: San Juan County Place_Keyword: Kane County Place_Keyword: Coconino County Place_Keyword: Lake Powell Place_Keyword: Glen Canyon National Recreation Area Place_Keyword: Glen Canyon Place_Keyword: Colorado River Place_Keyword: Great Bend Place_Keyword: San Juan River Place_Keyword: Escalante River Place_Keyword: Hite Place_Keyword: Good Hope Bay Place_Keyword: Bullfrog Place_Keyword: Bullfrog Bay Place_Keyword: Halls Crossing Place_Keyword: Halls Bay Place_Keyword: Rainbow Bridge National Monument Place_Keyword: Dangling Rope Place_Keyword: Rock Creek Bay Place_Keyword: Friendship Bay Place_Keyword: Last Chance Bay Place_Keyword: Padre Bay Place_Keyword: Gunsight Bay Place_Keyword: Warm Creek Bay Place_Keyword: Wahweap Place_Keyword: Wahweap Bay Place_Keyword: Antelope Canyon Place_Keyword: Navajo Canyon Place_Keyword: Page Place_Keyword: Glen Canyon Dam Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: lake floor Stratum_Keyword: lakefloor Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2017 Access_Constraints: none Use_Constraints: Public domain data from the U.S. Government are freely re-distributable 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_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Brian Andrews Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: US 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: https://www.sciencebase.gov/catalog/file/get/5ba3cc6de4b08583a5c81bbf/?name=2017-049-FA_T20P_Backscatter_2m_browse.jpg Browse_Graphic_File_Description: Thumbnail image of 2-m multibeam echosounder backscatter data collected within Lake Powell, UT-AZ. Browse_Graphic_File_Type: JPEG Data_Quality_Information: Logical_Consistency_Report: This backscatter mosaic represents processed dual-head Reson T20-P multibeam echosounder (MBES) time series data gridded at 2-m resolution. Quality control and data processing were conducted to remove spurious points and reduce sound speed artifacts (refraction) using Computer Aided Resource Information System (CARIS) Hydrographic Information Processing System (HIPS; versions 10.2 and 10.4). Despite this processing, small areas of vessel motion and refraction artifacts remain in the data, particularly in deeper areas of the Colorado River. The small slot canyons terminating in the Colorado River presented several challenges to acoustic survey methods. The deep, sinuous canyons such as Rainbow Bridge, Navajo, and Wetherill Canyons are characterized by steep walls with overhangs, above-and below-the lake surface. The overhangs above the surface interfered with the GPS signal at times, requiring detailed editing of the navigation within these areas. The canyon wall overhangs beneath the lake surface produced multipathing of the acoustic signal that required significant editing to minimize the multipath artifact. Small "no data" gaps exist throughout the dataset. These are the result of editing the artifacts and, in some areas, eliminating low quality soundings. In addition, gaps exist in shallow areas where underwater obstructions created hazards for the safe navigation of the survey vessel. Despite editing of the attitude data, vertical offsets between adjacent lines still exist due to equipment malfunctions at the end of the survey in Wahweap and Warm Springs Bays. Completeness_Report: Data were not collected on October 23, 2017 while the base of operations was moved from Bullfrog, UT in the northeast to Page, AZ in the southwest. Data were not collected between Nov 10 and 14 because of a cable failure of the Applanix navigation and attitude system. Operations resumed (and were completed) November 15, 2017 after installation of the new cable. These data have not been ground validated with lakebed sediment samples. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation data were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5), which blends Global Navigation Satellite Systems (GNSS) with acceleration data from a Motion Reference Unit (MRU) and GPS azimuthal heading. The POS MV was configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole, approximately midships on the starboard side of vessel. DGPS positions were obtained from the primary antenna located on the forward end of the baseline, and the positional offsets between the antenna and the navigational reference point (the POS MV IMU) were accounted for in the Applanix POSView (version 8.60) acquisition software. DGPS positions are horizontally accurate to 0.5 - 2 meters, but accuracy can increase to less than 10 cm after post-processing with Applanix POSPac (version 8.1). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: raw MBES data in s7k format Geospatial_Data_Presentation_Form: digital data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20171008 Ending_Date: 20171115 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: RAW RESON T20-P MULTIBEAM ECHOSOUNDER FILES Source_Contribution: Multibeam echosounder (MBES) bathymetry data were collected using dual-head Reson T20-P sonars. The pair of mills cross transmit and receive arrays were mounted side-by-side within a bracket that oriented them at opposing 30 degree angles (relative to horizontal). The bracket was pole-mounted on the starboard side of the R/V Stephens so that the sonar arrays were oriented athwart ships (primary and secondary arrays facing outward and down to port and starboard, respectively) and located approximately 1.235 m below the waterline when deployed. Vessel navigation and attitude data were acquired using an Applanix POS MV Wavemaster (model 220, V5) configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole approximately midships on the starboard side of vessel, and the wetpod MRU mounted atop the sonar bracket just aft of the pole. An AML Micro X SV mounted on the sonar bracket monitored sound speed near the sonars during acquisition, and an AML Minos X SVPT deployed using an electric downrigger mounted on the port quarter was used to collect water column sound speed profiles 1 to 3 times each survey day (See shapefile 2017-049-FA_MVPdata.shp available from the larger work citation). The Reson SeaBat User Interface (version 5.0.0.6) was used to control the sonars, which were operated in intermediate mode at full power (220 db), with frequency-modulated pulses between 200 to 300 kHz. The range of the 1024 across track beams formed by the sonars were adjusted manually depending on water depth, and resulted in combined swath widths of 60 to 200 meters or typically 3 to 6 times the water depth. Data were monitored and recorded using the Reson SeaBat User Interface (UI) (version 5.0.0.6) and Hypack/Hysweep (version 2017, 17.1.3.0). The SeaBat User Interface logged the navigation, attitude, bathymetry, time-series backscatter, and water column data to s7k format files for each sonar. The line files were created by the Reson UI using the following naming convention: YYYYMMDD_HHMMSS_M/S. The line files were appended with a "M" and "S" suffix to denote the port (primary) "M" and "S" starboard (or secondary) sonar heads. Process_Step: Process_Description: PROCESSING STEP 1: CARIS HIPS DATA PROCESSING. Multibeam bathymetry processing within CARIS HIPS (version 10.2) during the survey consisted of the following flow: 1) Vessel configuration files were created in CARIS for the port ("M"=main, or primary) and starboard ("S"=secondary) sonars (RVStephens_DualT20P_M.hvf, and RVStephens_DualT20P_S.hvf) which included relevant, linear and angular installation offsets for each T20-P unit as well as vendor specified uncertainty values for each of the survey sensors. 2) A CARIS HIPS project (version 10.2) was created with projection information set to Universal Transverse Mercator (UTM) Zone 12N, WGS 84. Separate HIPS projects were created for the Port (M), and Starboard (S) line files using the two vessel configuration files in #1 above. 3) Each Reson s7k file (M and S) were imported to the new CARIS projects (M and S respectively) using the Import/Conversion Wizard. 4) Delayed heave data from raw POS MV files were used to update HIPS survey lines using the import auxiliary data function. 5) Navigation was reviewed and edited as needed using the Navigation Editor tool. 6) Sound velocity correction was applied using the CARIS algorithm, a master SVP file containing all the sound velocity profiles collected during the survey and specifying the nearest in distance method, delayed heave source, and use surface sound speed. 7) Data were merged selecting no tide and the delayed heave source. 8) 2-m resolution Swath Angle Weighted (SWATH) surfaces were created to incorporate all the files (M and S) as they were processed, and the SWATH surfaces were reviewed for inconsistencies and anomalies. 9) The swath and subset editors were used to remove spurious points through manual editing and filter application, and the refraction editor was used to adjust sound speed values in areas where velocimeter data did not adequately correct depth profiles, which were obviously influenced by local anomalies in speed of sound through the water column. 10) Survey lines adjusted for refraction anomalies were remerged, and the respective SWATH surfaces were recomputed to reflect the changes. Processing during the survey was primarily focused on QA/QC during acquisition. Editing processes did require trial and error, and were at times iterative. The contact person for this and all subsequent processing steps below is Brian Andrews. Process_Date: 201711 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Brian Andrews 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 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Process_Step: Process_Description: PROCESSING STEP 2: APPLY POST PROCESSED SBET FILES AND EDIT SOUNDINGS. Post-survey processing within CARIS HIPS (version 10.4) consisted of the following flow: 1) Post-processed navigation, vessel attitude, and GPS height data from POSPac SBET files, and post-processed RMS attitude error data from POSPac smrmsg files were used to update HIPS survey lines using the import auxiliary data function. 2) Navigation source was set to Applanix SBET, and navigation was reviewed and edited as needed using the Navigation Editor tool. 3) GPS tide was computed using delayed heave data, the vessel water line, and a single datum value of 0 m (vertically referencing the data to the WGS 84 Ellipsoid). 4) Sound velocity correction was reapplied using the CARIS algorithm, the master SVP file containing all the sound velocity profiles collected during the survey and specifying the nearest in distance method, delayed heave source, and use surface sound speed. 5) Data were remerged selecting the GPS tide and delayed heave sources. 6) 2-m resolution SWATH surfaces using both the M and S files were created using the Swath Angle method and a maximum footprint of 9. 7) Additional editing was conducted using the swath and subset editors to minimize inconsistencies and artifacts, and the SWATH surface was recomputed to reflect the changes. Finally, small "no data" holidays were filled using the "Fill Raster Holiday" tool and a 5x5 cell filter using data from a minimum of 5 neighboring cells. Process_Date: 201807 Process_Step: Process_Description: PROCESSING STEP 3: QPS FMGT PROCESSING Backscatter mosaics were created using QPS FMGT (v. 7.7.5) processing software. Raw s7k files containing the time series values, were paired with the HIPS line files that contained the depth data to create a two meter resolution time series backscatter mosaic that followed the steps below. 1) Create new FMGT projects for northeast, and southwest sections of Lake Powell using UTM 12N, WGS 84 coordinate system. 2) Set processing parameters for T20-P Sonar (defaults) 3) Set filter method to flat 300 4) Add source/paired files using the s7k for the backscatter files, and the "processed.depth" files from the HIPS line file directory. All the s7k and HIPS files were added by Julian day. Once the line files were added to the project a two meter draft mosaic was created using the "time-series" as the backscatter source for each Julian day for review. 5) A final two-meter mosaic was created and visually reviewed for inconsistencies or anomalies. Individual line files were moved to up or down in the mosaic order to increase quality if needed. The "Backscatter Adjustment" tool was used to increase or decrease intensity of individual lines as required to match adjacent lines. 6) The resulting mosaic was exported out of FMGT as an 8-bit gray-scale GeoTIFF. Process_Date: 201807 Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200806 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: Pixel Row_Count: 52564 Column_Count: 51513 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: 12N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -111 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 2.0 Ordinate_Resolution: 2.0 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Acoustic reflectance values of the submerged portions of Lake Powell located in Glen Canyon National Recreation Area. No data value = 0. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey 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 Address: Building 810 Address: 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: Multibeam backscatter data collected within Lake Powell UT-AZ during USGS Field Activity 2017-049-FA, using a dual-head Reson T20-P multibeam echosounder: includes the GeoTIFF image 2017-049-FA_T20P_Backscatter_2m.tif, the browse graphic 2017-049-FA_T20P_Backscatter_2m_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2017-049-FA_T20P_Backscatter_2m_meta.xml) 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: GeoTIFF Format_Version_Number: QPS FMGT(v. 7.7.5) Format_Specification: 8-bit GeoTIFF file Format_Information_Content: GeoTIFF image file derived from MBES backscatter data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Lake Powell and the associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 144 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5ba3cc6de4b08583a5c81bbf Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5ba3cc6de4b08583a5c81bbf Network_Resource_Name: https://doi.org/10.5066/P90BU2VS Access_Instructions: The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page. Digital_Form: Digital_Transfer_Information: Format_Name: WMS Format_Information_Content: Image of 2017-049-FA_T20P_Backscatter_2m.tif provided through a WMS (web mapping service). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalogMaps/mapping/ows/5ba3cc6de4b08583a5c81bbf?service=wms&request=getcapabilities&version=1.3.0 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5ba3cc6de4b08583a5c81bbf Network_Resource_Name: https://doi.org/10.5066/P90BU2VS Access_Instructions: The first link in the network resources accesses the data through a mapping service, the second is to the page containing the data, and the third link is to the publication landing page. Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Mapping Service (REST) Format_Information_Content: Image of 2017-049-FA_T20P_Backscatter_2m.tif provided through a ArcGIS mapping service (REST). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://gis.usgs.gov/sciencebase2/rest/services/Catalog/5ba3cc6de4b08583a5c81bbf/MapServer Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5ba3cc6de4b08583a5c81bbf Network_Resource_Name: https://doi.org/10.5066/P90BU2VS Access_Instructions: The first link in the network resources accesses the data through a mapping service, the second is to the page containing the data, and the third link is to the publication landing page. Fees: none Technical_Prerequisites: To utilize these data, the user must have software capable of viewing GeoTIFF files. Metadata_Reference_Information: Metadata_Date: 20200806 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Brian Andrews Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 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