Single-Beam Bathymetry Data Collected in 2015 nearshore Dauphin Island, Alabama, U.S. Geological Survey (USGS). These data are in the North American Datum 1983 (NAD83) for horizontal component, and the North American Vertical Datum 1988 (NAVD88) with respect to GEOID12A, and Mean Low or Lower Water (MLLW) for the vertical components.

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 20170508
Title:

Single-Beam Bathymetry Data Collected in 2015 nearshore Dauphin Island, Alabama, U.S. Geological Survey (USGS). These data are in the North American Datum 1983 (NAD83) for horizontal component, and the North American Vertical Datum 1988 (NAVD88) with respect to GEOID12A, and Mean Low or Lower Water (MLLW) for the vertical components.

Geospatial_Data_Presentation_Form: Mulitmedia
Online_Linkage: https://doi.org/10.5066/F7BZ648W
Larger_Work_Citation:

Citation_Information:

Originator: Nancy T. DeWitt
Originator: Chelsea A. Stalk
Originator: James G. Flocks
Originator: Julie C. Bernier
Originator: Kyle W. Kelso
Originator: Jake J. Fredericks
Originator: Thomas Tuten
Publication_Date: 2017
Title:

Single-Beam Bathymetry Data Collected in 2015 nearshore Dauphin Island, Alabama.

Geospatial_Data_Presentation_Form: multimedia presentation
Series_Information:

Series_Name: U.S. Geological Survey Data Release
Issue_Identification: doi:10.5066/F7BZ648W

Publication_Information:

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

Online_Linkage: https://doi.org/10.5066/F7BZ648W

Description:

Abstract:

Dauphin Island, Alabama is a barrier island located in the Gulf of Mexico that supports local residence, tourism, commercial infrastructure, and the historical Fort Gaines. During the past decade the island has been impacted by several major hurricanes (Ivan, 2004; Katrina, 2005; Isaac 2012). Storms along with sea level rise, presents a continued threat to island stability. State and federal managers are taking a scientific investigative approach to identify the best options available to formulate and implement a long-term plan to properly restore Dauphin Island and provide resilience against future storms and sea-level rise. Island morphology, including current bathymetry data, is one of several aspects being investigated and funded through a grant from National Fish and Wildlife Foundation Gulf Environmental Benefit Fund. In August 2015, the United States Geological Survey Saint Petersburg Coastal and Marine Science Center (USGS SPCMSC) in cooperation with the United States Army Corps of Engineers (USACE) and the state of Alabama conducted bathymetric surveys of the nearshore waters surrounding Dauphin Island. This data release provides 1,165-line kilometers (km) of processed single-beam bathymetry (SBB) data collected by the USGS SPCMSC in August 2015 (Field Activity Number [FAN] 2015-326-FA). Data were acquired aboard 4 separate survey vessels; the RV Sallenger (subFAN, 15BIM10), the RV Jabba Jaw (subFAN, 15BIM11), the RV Shark (subFAN, 15BIM12), and the RV Chum (subFAN, 15BIM13). The data are provided in three datums: 1) the International Terrestrial Reference Frame of 2000 (ITRF00), ellipsoid height (-47.04 meters [m] to -29.36 m); 2) the North American Datum of 1983, realization of CORS96 (NAD83 (CORS96)) horizontal, and the North American Vertical Datum 1988 (NAVD88) vertical (-0.24 m to -17.33 m); and 3) the NAD83 (CORS96) horizontal, and Mean Lower Low Water (MLLW) vertical (-0.12 m to -17.93 m). Additional files include trackline shapefiles, digital and handwritten Field Activity Collection Systems (FACS) logs, a comprehensive 50-meter Digital Elevation Model (DEM), and formal Federal Geographic Data Committee (FGDC) metadata.

Purpose:

This zip archive contains processed x,y,z data points for the single-beam bathymetry data (SBB) collected in August 2015 (FAN=2015-326-FA; SubFans=15BIM10, 15BIM11, 15BIM12 and 15BIM13) around Dauphin Island, Alabama. The processed single-beam soundings are provided as ASCII x,y,z point data.

Supplemental_Information:

The single-beam surveys were acquired and processed to a geodetic reference ellipsoid. The single-beam data was acquired using stand-alone GPS and then post-processed to obtain Differential Global Positioning System DGPS navigation. All single-beam surveys were referenced to WGS84 (G1150)/ITRF00. The final x,y,z position data from each survey were merged to generate a digital elevation model (DEM) with a cell-size resolution of 50 meters.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20150819
Ending_Date: 20150825

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -88.395035
East_Bounding_Coordinate: -88.037688
North_Bounding_Coordinate: 30.271956
South_Bounding_Coordinate: 30.190155

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5cfc2d26-faa3-4bfe-bf03-8dedb2806928

Theme:

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

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geology
Theme_Keyword: geophysics
Theme_Keyword: bathymetry
Theme_Keyword: single-beam echo sounder
Theme_Keyword: field monitoring stations
Theme_Keyword: digital elevation models

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: trackline
Theme_Keyword: bathymetry
Theme_Keyword: USGS
Theme_Keyword: shapefile
Theme_Keyword: HYPACK
Theme_Keyword: single-beam bathymetry
Theme_Keyword: base station
Theme_Keyword: benchmark
Theme_Keyword: West Dauphin Island (WDAU) Benchmark
Theme_Keyword:

NGS (National Geodetic Survey) Permanent Identifier (PID) BH1755

Theme_Keyword: kinematic
Theme_Keyword: shoreline
Theme_Keyword: hydrography
Theme_Keyword: ODOM Echotrach CV-100
Theme_Keyword: ODOM
Theme_Keyword: TSS Motion Sensor
Theme_Keyword: echosounder
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC
Theme_Keyword: geophysical
Theme_Keyword: Barrier Island Evolution Research Project
Theme_Keyword: Barrier Island Mapping
Theme_Keyword: 15BIM10
Theme_Keyword: 15BIM11
Theme_Keyword: 15BIM12
Theme_Keyword: 15BIM13
Theme_Keyword: 2015-326-FA
Theme_Keyword: DEM
Theme_Keyword: Digital Elevation Model
Theme_Keyword: 50-meter DEM

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Alabama
Place_Keyword: Gulf of Mexico
Place_Keyword: Mississippi Sound
Place_Keyword: Dauphin Island

Stratum:

Stratum_Keyword_Thesaurus: None
Stratum_Keyword: datum
Stratum_Keyword: water
Stratum_Keyword: shoreline

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: August 2015

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: These data should not be used for navigational purposes.
Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Nancy T. DeWitt
Contact_Organization:

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

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
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; Esri ArcCatalog 10.1.0.3035

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the data is determined during data collection. The SBB data were collected during one research effort in August, 2015, USGS FAN 2015-326-FA. This research effort utilized four vessels and is therefore internally consistent per platform. Methods were 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. Each system has a dedicated computer, and efforts are made to utilize the same equipment and software versions on all systems. However, upgrades and changes occur and require additional setup, measurements, and notation. DGPS was always implemented for navigational accuracy in post-processing. These bathymetric data have not been independently verified for accuracy. For the SBB, offsets between the single-beam transducers, the Ashtech antenna reference point (ARP), and the TSS motion unit were measured and accounted for on the roving vessels. All pertinent measurements were accounted for in the DGPS post processing software packages (National Geodetic Survey On-Line Positioning User Service, OPUS, and Waypoint Product Group GrafNav, version 8.6). Bar checks were also performed as calibration efforts and accounted for any drift in the echosounder.

Logical_Consistency_Report:

This file represents the post-processed bathymetric data (x,y,z) collected during SBB surveys. They represent data coverage for the single-beam portion of the 2015 Dauphin Island survey, specifically FAN 2015-326-FA (SubFans 15BIM10, 15BIM11, 15BIM12, and 15BIM13). Refer to the online data release linkage for field logs, vessel platform descriptions, and other survey information; this information is directly available at https://doi.org/10.5066/F7BZ648W

Completeness_Report:

These are complete post-processed xyz bathymetric data points from acoustic single-beam data collected in August 2015 from the nearshore areas of Dauphin Island, Alabama.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

All static GPS base station sessions were run through the 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 daily weighted value of occupation time was calculated; longer occupation times held more value than shorter times. The final value for latitude, longitude, and ellipsoid was the weighted average of all the GPS session processed with OPUS. This value was entered in GrafNav version 8.6 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. The maximum horizontal error of the base station coordinates used for post-processing the single-beam bathymetry was 0.00028 decimal seconds latitude and 0.00022 decimal seconds longitude for BH17 and 0.00027 decimal seconds latitude and 0.00018 decimal seconds longitude for WDAU.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 0.00029
Horizontal_Positional_Accuracy_Explanation:

The range of error (0.00001 - 0.00029) for base stations BH17 and WDAU in latitude decimal seconds

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 0.00022
Horizontal_Positional_Accuracy_Explanation:

The range of error (0.00000 - 0.00022) for base stations BH17 and WDAU in longitude decimal seconds

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

All static base station sessions for BH17 and WDAU 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. SPCMSC standards define the maximum acceptable vertical error for any individual base station GPS session as less than or equal to three times the standard deviation of the ellipsoid height; any occupations exceeding this error are removed and the base station coordinates are recalculated. For BH17 base location the standard deviation of the ellipsoid height was 0.005 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.015 m. For WDAU base location the standard deviation of the ellipsoid height was 0.005 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.014 m.

Lineage:

Process_Step:

Process_Description:

VDatum Conversion: For the acquisition and processing steps please refer to the document Dauphin_Island_2015_SBB_ITRF00_xyz_metadata.txt, specifically the GPS acquisition, the single-beam bathymetry acquisition, the differentially corrected navigation processing, the single-beam bathymetry processing, and the single-beam bathymetry error analysis. This step involved transforming the file DI_2015_326_FA_SBB_Level_05_ITRF00.txt using VDATUM version 3.6 from ITRF00 to NAD83 for horizontal and NAVD88 with respect to GEOID12A model for the vertical component. This file was sent trough VDATUM version 3.6 a second time to convert the vertical from NAVD88 to Mean Low or Lower Water (MLLW).

Source_Used_Citation_Abbreviation: DI_2015_326_FA_SBB_Level_05_ITRF00.txt
Process_Date: 2016
Source_Produced_Citation_Abbreviation:

Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.txt Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.txt

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Nancy T. DeWitt
Contact_Organization:

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

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
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:

Gridding Bathymetric NAD83 NAVD88 dataset: Using Esri ArcGIS version 10.3.1, the SBB data file Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.txt was converted into a shapefile from which the single-beam elevations were examined for spatial distribution and vertical agreement. A triangulated irregular network (TIN) was generated with this shapefile data and constrained using a polygon shoreline. The polygon shoreline was created in ArcGIS version 10.3.1 from using the zero line extracted from the 2015 USGS Dauphin Island Lidar dataset. The TIN was generated using the ArcToolbox 3D Analysts Data Management Tool “Create TIN”. This TIN file was then sent through the 3D Analyst Conversion Tool “TIN to Raster” using the natural neighbor method at 50 meter (m) by 50 m spacing to produce the raster Digital Elevation Model (DEM). Lastly, the raster was clipped to the survey extent using Spatial Analyst Extract tool “Extract by Mask” tool. Gridding Bathymetric NAD83 MLLW dataset: Using Esri ArcGIS version 10.3.1, the SBB data file Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.txt was converted into a shapefile from which the single-beam elevations were examined for spatial distribution and vertical agreement. A triangulated irregular network (TIN) was generated with this shapefile data and constrained using a polygon shoreline. The polygon shoreline was created in ArcGIS version 10.3.1 from using the zero line extracted from the 2015 USGS Dauphin Island Lidar dataset. The TIN was generated using the ArcToolbox 3D Analysts Data Management Tool “Create TIN”. This TIN file was then sent through the 3D Analyst Conversion Tool “TIN to Raster” using the natural neighbor method at 50 meter (m) by 50 m spacing to produce the raster Digital Elevation Model (DEM). Lastly, the raster was clipped to the survey extent using Spatial Analyst Extract tool “Extract by Mask” tool.

Source_Used_Citation_Abbreviation:

Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.txt Dauphin_2015_shoreline_NAD83_NAVD88_GEOID12A_polygon.shp
Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.txt Dauphin_2015_shoreline_NAD83_MLLW_polygon.shp

Process_Date: 2016
Source_Produced_Citation_Abbreviation:

Dauphin_Island_2015_NAD83_NAVD88_GEOID12A_50_DEM.tif Dauphin_Island_2015_NAD83_MLLW_50_DEM.tif

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:

Trackline shapfefile:This trackline file was created from the all-encompassing x,y,z point file for USGS FAN 2015-326-FA (15BIM10, 15BIM11, 15BIM12 and 15BIM13) in Esri ArcGIS version 10.3 using the XTools Pro extension, version 11.1. The x,y,z data point shapefile was sent through the "XTools" feature conversion tool, "make polylines from points". Within "XTools" feature conversion selection window, the following items were selected. The "group by field selection" was set to use the HYPACK line name attribute and the "input feature order - order by field" was set to use the FID attribute. The trackline file does not have a vertical component and may be used for the NAD83 NAVD88 GEOID12A point dataset and the NAD83 MLLW point dataset.

Source_Used_Citation_Abbreviation: Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.shp
Process_Date: 2016
Source_Produced_Citation_Abbreviation: Dauphin_Island_2015_SBB_NAD83_tracklines.shp
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

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

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

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 174
Column_Count: 686
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: 16
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -87.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 50
Ordinate_Resolution: 50

Planar_Distance_Units: meter

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: North American Datum 1983
Depth_Resolution: 0.1
Depth_Distance_Units: meter
Depth_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.txt
Entity_Type_Definition:

ASCII text file containing the processed single-beam bathymetry x,y,z point data in the NAD83, NAVD88 with respect to GEOID12A.

Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: NAD83_X
Attribute_Definition: NAD83 X-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 365809.4126
Range_Domain_Maximum: 400111.8019

Attribute:

Attribute_Label: NAD83_Y
Attribute_Definition: NAD83 Y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3340677.296
Range_Domain_Maximum: 3349384.4683

Attribute:

Attribute_Label: NAVD88_G12A
Attribute_Definition:

NAVD88 orthometric height of sample point, in meters with respect to GEOID12A

Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.2438
Range_Domain_Maximum: -18.0175

Attribute:

Attribute_Label: NAD83_Lat
Attribute_Definition: NAD83 Latitude of the sample point, in decimal degrees
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 30.193182
Range_Domain_Maximum: 30.271231

Attribute:

Attribute_Label: NAD83_Long
Attribute_Definition: NAD83 Longitude of the sample point, in decimal degrees
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -88.394405
Range_Domain_Maximum: -88.038000

Attribute:

Attribute_Label: Year
Attribute_Definition: The year the data was collected
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Unrepresentable_Domain: 2015

Attribute:

Attribute_Label: DOY
Attribute_Definition: Day of the year the data was collected
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 232
Range_Domain_Maximum: 236

Attribute:

Attribute_Label: GPS_Week
Attribute_Definition: The GPS week that the data point was acquired.
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1858
Range_Domain_Maximum: 1859

Attribute:

Attribute_Label: GPS_Second
Attribute_Definition: The GPS second that the data point was acquired.
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 48464.679
Range_Domain_Maximum: 601766.29

Attribute:

Attribute_Label: HYPACKLine
Attribute_Definition: Line number in survey generated by HYPACK.
Attribute_Definition_Source: HYPACK
Attribute_Domain_Values:

Unrepresentable_Domain:

Example 15BIM10_SALL_001_1400 in which 15BIM10 denotes the USGS FAN number, SALL denotes the vessel code of R/V Sallenger, 001 denotes the line number, and 1400 denotes the time the line started recording. Variations in FAN number and vessel code are the following: 15BIM10_SALL_001_1400 = R/V Sallenger 15BIM11_TVEE_001_1400 = R/V Jabba Jaw 15BIM12_WVR1_001_1400 = R/V Shark 15BIM13_WVR2_001_1400 = R/V Chum

Attribute:

Attribute_Label: DataType
Attribute_Definition: The type of data point.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain: SBB stands for single-beam bathymetry.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Dauphin_Island_2015_NAD83_tracklines.shp
Entity_Type_Definition:

Esri shapefile containing the survey tracklines for the single-beam bathymetry data collected during USGS FAN 2015-326-FA which includes subfans 15BIM10, 15BIM11, 15BIM12 and 15BIM13 surveyed in August 2015 nearshore Dauphin Island, Alabama.

Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Polyline ZM is the geometry type defining the features.

Attribute:

Attribute_Label: HYPACKLine
Attribute_Definition:

Trackline name assigned by HYPACK-A Xylem Brand acquisition software version 14 for 15BIM10 and version 13 for 15BIM11, 15BIM12, and 15BIM13 with the USGS FAN number appended to the beginning of the file. Example 15BIM10_SALL_001_1400 in which 15BIM10 denotes the USGS FAN number, SALL denotes the vessel code of R/V Sallenger, 001 denotes the line number, and 1400 denotes the time the line started recording. Variations in FAN number and vessel code are the following: 15BIM10_SALL_001_1400 = R/V Sallenger 15BIM11_TVEE_001_1400 = R/V Jabba Jaw 15BIM12_WVR1_001_1400 = R/V Shark 15BIM13_WVR2_001_1400 = R/V Chum

Attribute_Definition_Source: HYPACK
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 15BIM10_001_1554
Range_Domain_Maximum: 15BIM13_142_2159

Attribute:

Attribute_Label: DOY
Attribute_Definition: Day of year the trackline was surveyed.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 232
Range_Domain_Maximum: 236

Attribute:

Attribute_Label: Year
Attribute_Definition: The year the data was collected
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Unrepresentable_Domain: 2015

Attribute:

Attribute_Label: USGS_FAN
Attribute_Definition:

The USGS FAN number assigned to the survey vessel and survey type. 15BIM10 = RV Sallenger, 15BIM11 = RV Jabba Jaw, 15BIM12 = RV Shark, and 15BIM13 = RV Chum.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain: USGS FAN Number as assigned.

Attribute:

Attribute_Label: Lenth_m
Attribute_Definition: Length of survey line, in meters
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.28
Range_Domain_Maximum: 27,948.06
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Boat
Attribute_Definition:

USGS vessel name from which survey data was acquired. The R/V Sallenger was used to acquire data for 15BIM10. The R/V Jabba Jaw was used to acquire data for 15BIM11. The R/V Shark was used to acquire data for 15BIM12, and the R/V Chum was used to acquire data for 15BIM13.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain: USGS research vessel name

Detailed_Description:

Entity_Type:

Entity_Type_Label: Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.txt
Entity_Type_Definition:

ASCII text file containing the processed single-beam bathymetry x,y,z point data in the NAD83 and MLLW

Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: NAD83_X
Attribute_Definition: NAD83 X-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 365809.4126
Range_Domain_Maximum: 400111.8019

Attribute:

Attribute_Label: NAD83_Y
Attribute_Definition: NAD83 Y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3340677.296
Range_Domain_Maximum: 3349384.4683

Attribute:

Attribute_Label: MLLW
Attribute_Definition: Mean Lower Low Water (MLLW) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.1182
Range_Domain_Maximum: -17.9311

Attribute:

Attribute_Label: NAD83_Lat
Attribute_Definition: NAD83 Latitude of the sample point, in decimal degrees
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 30.193182
Range_Domain_Maximum: 30.271231

Attribute:

Attribute_Label: NAD83_Long
Attribute_Definition: NAD83 Longitude of the sample point, in decimal degrees
Attribute_Definition_Source: VDatum version 3.6
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -88.394405
Range_Domain_Maximum: -88.038000

Attribute:

Attribute_Label: Year
Attribute_Definition: The year the data was collected
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Unrepresentable_Domain: 2015

Attribute:

Attribute_Label: DOY
Attribute_Definition: Day of the year the data was collected
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 232
Range_Domain_Maximum: 236

Attribute:

Attribute_Label: GPS_Week
Attribute_Definition: The GPS week that the data point was acquired.
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1858
Range_Domain_Maximum: 1859

Attribute:

Attribute_Label: GPS_Second
Attribute_Definition: The GPS second that the data point was acquired.
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 48464.679
Range_Domain_Maximum: 601766.29

Attribute:

Attribute_Label: HYPACKLine
Attribute_Definition: Line number in survey generated by HYPACK.
Attribute_Definition_Source: HYPACK
Attribute_Domain_Values:

Unrepresentable_Domain:

Attribute:

Attribute_Label: DataType
Attribute_Definition: The type of data point.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain: SBB stands for single-beam bathymetry.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Nancy T. DeWitt
Contact_Organization:

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

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
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: Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.txt
Distribution_Liability:

This publication was prepared by an agency of the United States Government. Although these data were 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, raster, and shapefile
File_Decompression_Technique: ZIP
Transfer_Size: 241.34

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7BZ648W/data/Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_xyz.zip

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7BZ648W/data/Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_50_DEM.zip

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7BZ648W/data/Dauphin_Island_2015_SBB_NAD83_tracklines.zip

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7BZ648W/data/Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.zip

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7BZ648W/data/Dauphin_Island_2015_SBB_NAD83_MLLW_50_DEM.zip

Fees: none

Technical_Prerequisites:

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

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2017

Metadata_Reference_Information:

Metadata_Date: 20201013
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Nancy T. DeWitt
Contact_Organization:

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

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
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: 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/Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_MLLW_xyz_metadata.html>