Multibeam bathymetric data collected within Lake Powell, UT-AZ during USGS Field Activity 2017-049-FA using a dual-head Reson T20-P multibeam echosounder (32-bit GeoTIFF, UTM Zone 12N, NAD 83, NAVD 88 Vertical Datum, 2-m resolution).

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2018
Title:
Multibeam bathymetric data collected within Lake Powell, UT-AZ during USGS Field Activity 2017-049-FA using a dual-head Reson T20-P multibeam echosounder (32-bit GeoTIFF, UTM Zone 12N, NAD 83, NAVD 88 Vertical Datum, 2-m 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: 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/P90BU2VSm .
Online_Linkage: https://doi.org/10.5066/P90BU2VS
Online_Linkage:
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:
The purpose of this dataset is to provide a high-resolution digital elevation model (DEM) of the lake bed of the Lake Powell reservoir referenced to the North American Vertical Datum of 1988 (NAVD 88). These data will be merged with recently flown LiDAR data to produce a bathymetric-topographic elevation model to develop new capacity tables for the Lake Powell Reservoir.
Supplemental_Information:
The elevation of the lake surface during the time of the survey was approximately 1081 meters (WGS 84 ellipsoidal heights), or 1107 meters, (orthometric heights relative to the NAVD 88 vertical datum) 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: -111.57278
East_Bounding_Coordinate: -110.41513
North_Bounding_Coordinate: 37.84086
South_Bounding_Coordinate: 36.88445
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5b90140ae4b0702d0e80756d
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 bathymetry
Theme_Keyword: bathymetry
Theme_Keyword: Reson
Theme_Keyword: T20-P
Theme_Keyword: Lacustrine Geology
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: elevation
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: multibeam sonar
Theme_Keyword: lakebed characteristics
Theme_Keyword: bathymetry
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. These data are not to be used for navigation.
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: Browse_Graphic_File_Description:
Thumbnail image of 2-m multibeam echosounder bathymetry data collected within Lake Powell, UT-AZ.
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Logical_Consistency_Report:
This grid represents processed dual-head Reson T20-P multibeam echosounder (MBES) bathymetry 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.
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).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy of the raw data based on system specifications may be approximately 1 percent of water depth (ranging from 0.5 to 1.5 meters based on the water depth range of less than 5 meters to approximately 150 meters within the survey area). The Applanix Wavemaster POS MV Attitude and Positioning system, used to correct for vessel roll, pitch, heave, and yaw, has a theoretical vertical accuracy of a few mm. Post-Processed Kinematic (PPK) GPS height corrections (from Applanix POSPac smoothed best estimate of trajectory (SBET) files) were used to reference soundings to the World Geodetic System 1984 (WGS 84) ellipsoid and remove water depth fluctuations in lake levels during the survey. Fifty-six sound speed profiles acquired with an AML Minos X SVPT sound velocity profiler were used during processing to minimize acoustic refraction artifacts in the bathymetry data. Changes in vessel draft due to water and fuel usage were not considered.
Additionally, uncertainty associated with the vertical transformation of the bathymetric grid from WGS 84 (ITRF 2000) to the North American Vertical Datum of 1988 (NAVD 88) using VDatum transformation tool (NOAA) is approximately 7.6 cm as calculated by the VDatum tool (v. 3.8).
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 and backscatter 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_SVPdata.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 an "M" and "S" suffix to denote the port (or 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 includes, 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:
PROCESSSING STEP 3: EXPORT AND TRANSFORM TO NAVD 88.
The CARIS HIPS SWATH surfaces were exported as 2-m per pixel ASCII files referenced to UTM Zone 12N, WGS 84 and WGS 84 ellipsoidal heights, but the desired vertical datum of the final composite bathymetric surface was the North American Vertical Datum of 1988 (NAVD 88). The National Oceanic and Atmospheric Administration's Vertical Datum Transformation tool (VDatum v. 3.8) was used to achieve that goal. The process required transformation of the horizontal and vertical reference frames from UTM Zone 12, WGS 84 and WGS 84 ellipsoidal heights to UTM Zone 12, North American Datum of 1983 (NAD 83) and NAVD 88 orthometric heights (all in meters) using the GEIOD12B geoid model. The resulting ASCII rasters were merged together into one 32-bit floating point GeoTIFF (2017-049-FA_T20PBathymetry_2m.tif.) using the "Mosaic to New Raster" tool within ArcMap (v. 10.3.1).
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: 52771
Column_Count: 50428
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: GCS_North_American_1983_2011
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: North American Vertical Datum of 1988
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Elevation values in 32-bit GeoTIFF format. Data values represent depths referenced to the North American Vertical Datum of 1988 (NAVD 88).
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:
USGS data release 2017-049-FA multibeam echosounder 2-m bathymetry of Lake Powell, UT-AZ: includes the GeoTIFF image 2017-049-FA_T20P_Bathymetry_2m.tif, the browse graphic 2017-049-FA_T20P_Bathymetry_2m_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2017-049-FA_T20P_Bathymetry_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: ArcGIS (v. 10.3.1)
Format_Specification: 32-bit GeoTIFF file
Format_Information_Content:
GeoTIFF image file derived from MBES bathymetry data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Lake Powell AZ-UT and the associated metadata.
File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip
Transfer_Size: 620
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: 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_Bathymetry_2m.tif provided through a WMS (web mapping service).
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: 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_Bathymetry_2m.tif provided through a ArcGIS mapping service (REST).
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: 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

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