Single-Beam Bathymetric Data Collected in 2011 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 11BIM02)

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Metadata:

Identification_Information
Data_Quality_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 20131231
Title:

Single-Beam Bathymetric Data Collected in 2011 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 11BIM02)

Geospatial_Data_Presentation_Form: ASCII
Online_Linkage:

http://pubs.usgs.gov/ds/0848/downloads/ascii/11BIM02_SBB_xyz.zip

Larger_Work_Citation:

Citation_Information:

Originator: Nancy T. DeWitt
Originator: William R. Pfeiffer
Originator: Julie C. Bernier
Originator: Noreen Buster
Originator: Jennifer L. Miselis
Originator: James G. Flocks
Originator: B.J. Reynolds
Originator: Dana S. Wiese
Originator: Kyle W. Kelso
Publication_Date: 20131231
Title:

Coastal Bathymetry Data Collected in 2011 from the Chandeleur Islands, Louisiana

Geospatial_Data_Presentation_Form: multimedia presentation
Series_Information:

Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 848

Publication_Information:

Publication_Place: St. Petersburg, Florida
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.3133/ds848

Description:

Abstract:

As part of the Barrier Island Evolution Research Project, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off the northern Chandeleur Islands, Louisiana, in June of 2011. The overall objectives of the study are to better understand barrier-island geomorphic evolution, particularly storm-related depositional and erosional processes that shape the islands over annual to interannual timescales (1-5 years). Collection of geophysical data will allow us to identify relationships between the geologic history of the island and its present day morphology and sediment distribution. This mapping effort was the first in a series of three planned surveys in this area. High resolution geophysical data collected in each of three consecutive years along this rapidly changing barrier-island system will provide a unique time-series dataset that will significantly further the analyses and geomorphological interpretations of this and other coastal systems, improving our understanding of coastal response and evolution over short time scales (1-5 years). This report serves as an archive of processed interferometric swath and single-beam bathymetry data that were collected during two cruises (USGS Field Activity Numbers 11BIM01 and 11BIM02) along the northern portion of the Chandeleur Islands, Breton National Wildlife Refuge, Louisiana, in June of 2011. Geographic information system data products include a 50 m-cell-size interpolated bathymetry grid surface, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee metadata.

Purpose:

This zip archive contains the output of processed single beam bathymetry data collected in June 2011 around the northern Chandeleur Islands, Louisiana. The processed single beam soundings are provided as ASCII x,y,z point data.

Supplemental_Information:

The swath bathymetry data were collected and processed in the ITRF2005 geodetic reference ellipsoid, whereas the single-beam data were collected and processed in WGS84 (G1150)/ITRF00. Both datasets were subsequently transformed horizontally to NAD83 and then vertically to NAVD88 and MLLW, using the GEOID09 model, with NOAA VDatum version 3.2 transformation software (http://vdatum.noaa.gov/). The final NAD83, NAVD88 x,y,z position data from each survey were merged to generate a digital elevation model with a cell-size resolution of 50 meters.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20110602
Ending_Date: 20110616

Currentness_Reference: ground condition

Status:

Progress: complete
Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -88.90112
East_Bounding_Coordinate: -88.761988
North_Bounding_Coordinate: 30.070927
South_Bounding_Coordinate: 29.86931

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:d666d2da-2050-4033-8430-4f0254a04a37

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: General
Theme_Keyword: marine geology
Theme_Keyword: bathymetry
Theme_Keyword: single beam
Theme_Keyword: echosounder
Theme_Keyword: Marimatech
Theme_Keyword: E-SEA-206
Theme_Keyword: hydrography
Theme_Keyword: geophysical
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC
Theme_Keyword: Barrier Island Evolution Research Project
Theme_Keyword: Barrier Island Mapping
Theme_Keyword: 11BIM02

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Chandeleur Islands
Place_Keyword: Gulf of Mexico
Place_Keyword: Chandeleur Sound
Place_Keyword: Louisiana

Access_Constraints:

The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.

Use_Constraints:

The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data. These data should not be used for navigational purposes.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: Mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Data_Set_Credit:

U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center

Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the data is determined during data collection. This dataset is from one research cruise and is therefore internally consistent. Methods are employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally entered into their respective programs. For the single-beam bathymetry, offsets between the single-beam transducers and the Ashtech antenna reference point (ARP) were measured and accounted for in post-processing. Bar checks were performed as calibration efforts and accounted for any drift in the Marimatech Echosounder. Differential Geographic Positioning System (DGPS) coordinates were obtained using post-processing software packages (National Geodetic Survey On-Line Positioning User Service, OPUS, and Waypoint Product Group GrafNav, version 8.10). GPS is always implemented for navigational accuracy either during acquisition or as a post-processing step. These bathymetric data have not been independently verified for accuracy.

Logical_Consistency_Report:

This zip archive contains the post-processed single-beam bathymetric data from a single research cruise in June 2011. Refer to the online data series linkage for field logs, vessel platform descriptions, and other survey information.

Completeness_Report:

These are complete post-processed x,y,z bathymetric data points from acoustic single-beam data collected in June 2011 from around the northern Chandeleur Islands.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

All static GPS base station sessions were run through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were entered into a spreadsheet to compute one final coordinate and error analysis for that base location. Using the OPUS values for each day and the total time that data were collected each day, the average weighted value of occupation time was calculated for each day (longer occupation times held more value than shorter times). The final value for latitude, longitude, and ellipsoid was a weighted average of all the GPS session. This value was then used in GrafNav as the base station coordinates. Error was calculated using output from OPUS for each day and was calculated as the absolute value of the final value minus the daily value. For this survey, the maximum horizontal error for the base station used for processing the single-beam bathymetry was 0.00000 to 0.00018 decimal seconds for latitude and 0.00002 to 0.00045 decimal seconds in longitude.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

All static base station sessions were processed through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional error for each GPS session was calculated as the absolute value of the final position minus the session position value. For this survey, the maximum vertical error for the base station used for processing the single-beam bathymetry was +/- 2.1 cm. All single-beam soundings are post-processed to the base station coordinates. During acquisition ship motion was measured using a TSS DMS-05 sensor which measures roll, pitch (manufacturer's specified accuracy +/- 0.05 degrees), and heave (5 percent of heave amplitude or 5 cm). During processing, the TSS measurements were used to geometrically correct the differentially corrected sounding positions. For the single-beam soundings, elevation differences at all trackline crossings were less than or equal to 14 cm, and the elevation differences were within +/- 10 cm for 99.3% of the 434 crossings at which the horizontal distance between soundings was less than 2 m. The maximum vertical transformation error reported by VDatum for eastern Louisiana is 17.1 centimeters.

Lineage:

Process_Step:

Process_Description:

GPS Acquisition: A GPS base station was erected at a temporarily installed USGS benchmark (TMRK) located on the sound side of the Chandeleur Islands within about 15 km of the farthest single-beam trackline. GPS receivers recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via the Thales choke-ring antenna. This GPS instrument combination was duplicated on the survey vessel (rover). The base receiver and the rover receiver record their positions concurrently at 1-second (s) recording intervals throughout the survey.

Process_Date: 20110616
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Single-Beam Bathymetry Acquisition: The single-beam bathymetric data were collected aboard the 22-foot R/V TwinVee. Boat motion was recorded at 50-millisecond (ms) intervals using a Teledyne TSS Dynamic Motion Sensor (TSS DMS-05). HYPACK version 10, a marine surveying, positioning, and navigation software package, managed the planned-transect information and provided real-time navigation, steering, correction, data quality, and instrumentation-status information to the boat operator. Depth soundings were recorded at 50-ms intervals using a Marimatech E-SEA-206 echosounder system with dual 208-kilohertz (kHz) transducers. Data from the GPS receiver, motion sensor, and fathometer were recorded in real time and merged into a single raw data file (.raw) in HYPACK, with each device string referenced by a device identification code and time stamped to UTC. Sound velocity measurements were collected using an Applied Microsystems Smart Sound Velocity Profiler (SVP). The instrument was cast overboard periodically throughout the survey to observe changes in water column speed of sound (SOS).

Process_Date: 20110616
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Differentially Corrected Navigation Processing: The coordinate values of the GPS base station (TMRK) are the time-weighted average of values obtained from the National Geodetic Survey On-Line Positioning User Service (OPUS). The base station coordinates were imported into GrafNav version 8.1 (Waypoint Product Group) and the kinematic GPS data from the survey vessel were post-processed to the concurrent GPS session data at the base stations. During processing, steps were taken to ensure that the trajectories between the base to the rover were clean, resulting in fixed positions. By analyzing the graphs, trajectory maps, and processing logs that GrafNav produces for each GPS session, GPS data from satellites flagged by the program as having poor health or satellite time segments that had cycle slips could be excluded, or the satellite elevation mask angle could be adjusted to improve the position solutions. The final differentially corrected precise DGPS positions were computed at 1-second (s) intervals for each rover GPS session and exported in ASCII text format to replace the uncorrected real-time rover positions recorded during acquisition. The GPS data were processed and exported in the World Geodetic System of 1984 (WGS84) (G1150) geodetic datum.

Process_Date: 20120301
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Single-beam Bathymetry Processing: The final DGPS positions exported from GrafNav were merged with the raw HYPACK files using the System for Accurate Nearshore Depth Surveying (SANDS), version 3.2. SANDS is a single-beam acoustic (sounding) GPS-based hydrographic processing software developed by the USGS for shallow water bathymetric mapping. Data were merged, geometrically corrected, and exported from SANDS in the originally acquired ellipsoid datum of WGS84 (G1150), which is equivalent to ITRF00.

Process_Date: 20120601
Source_Produced_Citation_Abbreviation: 11BIM02_SBB_ITRF00_xyz.txt
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Single-Beam Bathymetry Error Analysis: The processed single-beam data points were imported into ArcGIS, and an in-house Python script was created to evaluate the elevation differences at the intersection of crossing tracklines. The script calculates the elevation difference between points at each intersection using an inverse distance weighting equation. Elevation values at line crossings should not differ by more than the combined instrument acquisition error (manufacturer specified accuracies). GPS cycle slips, stormy weather conditions, and rough sea surface states may all contribute to poor data quality. If discrepancies were found that exceed the acceptable error threshold, then the line determined to be in error was either statically adjusted or removed. A line in error is considered to have one or more of the following: (1) a segment where several crossings are incomparable, (2) a known equipment problem, or (3) known bad GPS data seen in the post-processing steps.

Process_Date: 20120601
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Datum transformation: Using the transformation software VDatum version 3.2, both the single-beam bathymetric x,y,z data were transformed horizontally from their data acquisition datum (International Terrestrial Reference Frame of 2000, ITRF00) to the North American Datum of 1983 (NAD83) reference frame and the North American Vertical Datum of 1988 (NAVD88) orthometric elevation and Mean Lower Low Water (MLLW) tidal datum using the National Geodetic Survey (NGS) geoid model of 2009 (GEOID09).

Process_Date: 20130428
Source_Produced_Citation_Abbreviation: 11BIM02_SBB_NAD83_NAVD88_GEOID09_xyz.txt
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Added keywords section with USGS persistent identifier as theme keyword.

Process_Date: 20201013
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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 11BIM01_SBB_ITRF00_xyz.txt
Entity_Type_Definition:

ASCII text file containing the processed single-beam bathymetry x,y,z point data in the International Terrestrial Reference Frame of 2000 (ITRF00) geodetic datum.

Entity_Type_Definition_Source: USGS

Detailed_Description:

Entity_Type:

Entity_Type_Label: 11BIM02_SBB_NAD83_NAVD88_G09_xyz.txt
Entity_Type_Definition:

ASCII text file containing the processed single-beam bathymetry x,y,z point data transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID09 model.

Entity_Type_Definition_Source: USGS

Detailed_Description:

Entity_Type:

Entity_Type_Label: 11BIM02_SBB_WGS84_MLLW_xyz.txt
Entity_Type_Definition:

ASCII text file containing the processed single-beam bathymetry x,y,z point data transformed to the World Geodetic Systmem of 1984 (WGS84 G1150; equivalent to ITRF00) geodetic datum and Mean Lower Low Water (MLLW) tidal datum.

Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: ITRF00_X
Attribute_Definition: ITRF00 x-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: SANDS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 316606.963
Range_Domain_Maximum: 329964.074
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: ITRF00_Y
Attribute_Definition: ITRF00 y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: SANDS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3305647.893
Range_Domain_Maximum: 3328026.891
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: ITRF00_Z
Attribute_Definition: ITRF00 ellipsoid height of sample point, in meters
Attribute_Definition_Source: SANDS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -41.633
Range_Domain_Maximum: -28.446
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: DataType
Attribute_Definition: Geophysical data type
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: SBB
Enumerated_Domain_Value_Definition: Single-beam bathymetry
Enumerated_Domain_Value_Definition_Source: USGS

Attribute:

Attribute_Label: Year
Attribute_Definition: Year data was collected
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain: Character string

Attribute:

Attribute_Label: Lon_ITRF00
Attribute_Definition: ITRF00 longitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -88.901128
Range_Domain_Maximum: -88.761996
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: Lat_ITRF00
Attribute_Definition: ITRF00 latitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 29.869315
Range_Domain_Maximum: 30.070932
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: NAD83_X
Attribute_Definition: NAD83 x-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 316607.6835
Range_Domain_Maximum: 329964.7914
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: NAD83_Y
Attribute_Definition: NAD83 y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3305647.3048
Range_Domain_Maximum: 3328026.2979
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: NAVD88_G09
Attribute_Definition: NAVD88 GEOID09 orthometric height of sample point, in meters
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -13.7002
Range_Domain_Maximum: -0.5483
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Lon_NAD83
Attribute_Definition: NAD83 longitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -88.901120
Range_Domain_Maximum: -88.761988
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: Lat_NAD83
Attribute_Definition: NAD83 latitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 29.869310
Range_Domain_Maximum: 30.070927
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: Lon_WGS84
Attribute_Definition: WGS84 (G1150) longitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -88.901128
Range_Domain_Maximum: -88.761996
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: Lat_WGS84
Attribute_Definition: WGS84 (G1150) latitude of sample point, in decimal degrees
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 29.869315
Range_Domain_Maximum: 30.070932
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: MLLW
Attribute_Definition: MLLW tidal elevation of sample point, in meters
Attribute_Definition_Source: VDatum
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -13.7002
Range_Domain_Maximum: -0.5483
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Resource_Description: Downloadable Data
Distribution_Liability:

This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII
File_Decompression_Technique: ZIP
Transfer_Size: 6.5 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://pubs.usgs.gov/ds/0848/downloads/ascii/11BIM02_SBB_xyz.zip

Offline_Option:

Offline_Media: DVD-ROM
Recording_Format: UDF

Fees: none

Technical_Prerequisites:

The ASCII text files contained in the .zip archive can be accessed with any standard text file reader.

Metadata_Reference_Information:

Metadata_Date: 20201013
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Nancy DeWitt

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Use_Constraints:

The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.

Metadata_Security_Information:

Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/11BIM02_SBB_xyz_metadata.html>