Wilderness Breach Bathymetry Data Collected in May 2015 From Fire Island, New York: 50-Meter Digital Elevation Model

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20170424
Title:
Wilderness Breach Bathymetry Data Collected in May 2015 From Fire Island, New York: 50-Meter Digital Elevation Model
Geospatial_Data_Presentation_Form: Raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: DS 1049
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: St. Petersburg Coastal and Marine Science Center
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Timothy R. Nelson
Originator: Jennifer L. Miselis
Originator: Cheryl J. Hapke
Originator: Owen T. Brenner
Originator: Rachel E. Henderson
Originator: Billy J. Reynolds
Originator: Kathleen E. Wilson
Publication_Date: 20170424
Title:
Coastal bathymetry data collected in May 2015 from Fire Island, New York: The wilderness breach and shoreface
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: DS 1049
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: St. Petersburg Coastal and Marine Science Center
Online_Linkage: https://doi.org/10.3133/ds1049
Description:
Abstract:
Scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida, conducted a bathymetric survey of Fire Island, New York, from May 6 to 20, 2015. The U.S. Geological Survey is involved in a post-Hurricane Sandy effort to map and monitor the morphologic evolution of the wilderness breach as a part of the Hurricane Sandy Supplemental Project GS2-2B. During this study, bathymetry data were collected with single-beam echosounders and Global Positioning Systems, which were mounted to personal watercraft, along the Fire Island shoreface and within the wilderness breach. Additional bathymetry and elevation data were collected using backpack Global Positioning Systems on flood shoals and in shallow channels within the wilderness breach.
Purpose:
To determine the change Hurricane Sandy caused to the shoreface morphology and breach evolution at Fire Island, New York, USA, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a bathymetric survey of Fire Island from May 6 to 20, 2015. The objective of the data collection effort was to map the morphology of the shoreface and the wilderness breach as part of the USGS Hurricane Sandy Supplemental Project GS2-2B. This dataset, 201505_Wilderness_Breach_DEM.zip, consists of a 25-m cell size, interpolated Digital Elevation Model (DEM).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20150506
Ending_Date: 20150520
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.90866430
East_Bounding_Coordinate: -72.88270895
North_Bounding_Coordinate: 40.74073570
South_Bounding_Coordinate: 40.71461972
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:9f4e91d4-b039-4f4f-863c-e08a0fb493d0
Theme:
Theme_Keyword_Thesaurus: Global Change Master Science Directory (GCMD)
Theme_Keyword: OCEAN > COASTAL PROCESSES > BARRIER ISLANDS
Theme_Keyword: OCEAN > COASTAL PROCESSES > BEACHES
Theme_Keyword:
DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: marine geology
Theme_Keyword: bathymetry
Theme_Keyword: interferometry
Theme_Keyword: single-beam echosounder
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Hurricane Sandy Supplemental: Fire Island
Theme_Keyword: Hurricane Sandy
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificinformation
Theme_Keyword: elevation
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Fire Island
Place_Keyword: Fire Island National Seashore
Place_Keyword: Long Island
Place_Keyword: New York
Place_Keyword: United States
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 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_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Timothy R. Nelson
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701-4846
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy of the data is determined during data collection. This dataset is derived from a single field survey using identical equipment, set-ups, and staff; therefore, the dataset is internally consistent. During mobilization, each piece of equipment was isolated to obtain internal- and external-offset measurements with respect to the survey platform. All the critical measurements were recorded manually and then digitally entered into their respective programs. For single-beam soundings, the distance between the transducer and the GPS antenna was measured for each personal watercraft and accounted for during postprocessing. For ground-based measurements, elevation between the ground and antenna was measured for each surveyor in a walking stride and accounted for during postprocessing. For the base stations, the Ashtech ProFlex 500 system has a long static horizontal accuracy of 0.3 centimeters (cm) and 0.6-cm vertical accuracy. For the rovers, the postprocessed kinematic horizontal instrument accuracy is 1 cm, and vertical accuracy is 2 cm. The Echotrac CV100 Digital Hydrographic Echo Sounder has a vertical accuracy of 0.01 m +/- 0.1 percent depth.
Logical_Consistency_Report:
The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center collected shallow water bathymetric data of the shoreface and the wilderness breach on Fire Island, New York, in May 2015.
Completeness_Report:
This zip archive contains a 25-m gridded digital elevation model (DEM) from May 2015 bathymetry data collected from the wilderness breach. Users are advised to read the online Data Series and the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The digital elevation model (DEM) uncertainty was determined by withholding 10 percent of the x,y,z bathymetric data points used to create the raster. The raster was then sampled at the withheld positions and a root mean square (RMS) error was calculated from the differences between sample and interpolated bathymetry. The horizontal uncertainty was assumed to be half the vertical uncertainty.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 12.6 cm
Horizontal_Positional_Accuracy_Explanation: DEM uncertainty was determined using ArcGIS and Matlab (2015b).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The DEM uncertainty was determined by withholding 10 percent of the x,y,z bathymetric data points used to create the raster. The raster was then sampled at the withheld positions and an RMS error was calculated from the differences between sample and interpolated bathymetry.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 25.2 cm
Vertical_Positional_Accuracy_Explanation:
Raster uncertainty was determined using ArcGIS and Matlab (2015b).
Lineage:
Process_Step:
Process_Description:
Process Description: GPS Acquisition: GPS base stations were erected at benchmarks REST (near the town of Robins Rest) and U374 (NGS benchmark Permanent Identification number (PID#) KU0206) located on Fire Island. The base stations were equipped with Ashtech ProFlex 500 Global Navigation Satellite System (GNSS) receivers. The survey personal watercraft (PWC) (rovers) were equipped with ProFlex 500 GNSS receivers. The base and rover receivers recorded their positions concurrently at 10 Hertz (Hz) throughout the survey. Reference-station coordinates were verified with Continuously Operating Reference Station (CORS) sites using the Online Positioning User Service (OPUS), available at http://www.ngs.noaa.gov/OPUS/. U374 used reference stations ZNY1, NYRH, CTDA;, REST used stations NYCI, NYRH, and MOR6, and VC base used MOR6, CTGU, AND NYRH. OPUS-computed reference stations had horizontal errors of 0.4 cm for REST, 0.5 cm for U374, and 0.3 cm for VC. Vertical errors were 0.2 cm for REST, 0.3 cm for U374, and 1.5 cm for VC.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Billy J. Reynolds
Contact_Position: Engineering Technician
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8067
Contact_Facsimile_Telephone: 727-502-8181
Contact_Electronic_Mail_Address: breynolds@usgs.gov
Process_Step:
Process_Description:
Single-Beam Sounding Acquisition: Nearshore bathymetry was measured using single-beam sonar systems and GPS receivers mounted on two Yamaha (2010 and 2013) VX Deluxe personal watercraft (PWC). Each PWC was fitted with a single-beam transducer mounted off the starboard stern below the waterline off the starboard stern and placed 1.23 m and 1.30 m beneath the GPS antenna, for PWC1 and PWC2, respectively. HYPACK version 2013 was used for positioning and navigation during the survey. Depth soundings were recorded at 10 Hertz (Hz) using an Odom Ecotrac CV100 Digital Hydrographic Echo Sounder system with 200 kHz transducers with 4-degree transducers. Soundings were merged into a raw data file (.raw) and a sounding file (.bin) in Hypack. Each file was named according to transect number and coordinated universal time (UTC). Water column sound-velocity measurements were collected periodically throughout the survey, using a SonTek CastAway conductivity, temperature, and depth (CTD) meter. Data were processed using SonTek CastAway CTD software version 1.5.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Billy J. Reynolds
Contact_Position: Engineering Technician
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8067
Contact_Facsimile_Telephone: 727-502-8181
Contact_Electronic_Mail_Address: breynolds@usgs.gov
Process_Step:
Process_Description:
Ground-Based Mapping: Elevation data were collected using two Ashtech Z-Xtreme GPS receivers mounted in SECO backpacks with Ashtech Marine antennas attached to a pole extending above the head of the surveyor. The elevation of the antennas relative to the ground was measured for each surveyor in a walking stride position (varying between 2.07 and 2.10 m). The surveyors did not follow a pre-defined path but collected data over as much of the subaerial and shallow shoals and beach as possible during low tide.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Owen T. Brenner
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8085
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: obrenner@usgs.gov
Process_Step:
Process_Description:
Ground-Based Differentially Corrected Navigation Processing: Locations associated with backpack position were postprocessed using a differential correction derived from the base/rover setup. The base-station coordinates were imported into GrafNav version 8.5 (Waypoint Product Group) and the GPS data from the backpack surveys were processed to the concurrent GPS session data at the base stations. The horizontal and vertical coordinates of the backpack data points were saved in NAD83 and NAVD88 and exported as ASCII files.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Billy J. Reynolds
Contact_Position: Engineering Technician
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8067
Contact_Facsimile_Telephone: 727-502-8181
Contact_Electronic_Mail_Address: breynolds@usgs.gov
Process_Step:
Process_Description:
Ground-Based Data Processing: Using ArcGIS, erroneous ground-based horizontal and vertical positions, such as those that occurred when the surveyor took off the backpack and was transported between shoals, were removed. Once all extraneous data points were removed, the remaining data were saved as an ASCII file.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Owen T. Brenner
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8085
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: obrenner@usgs.gov
Process_Step:
Process_Description:
Single-Beam Differentially Corrected Navigation Processing: Horizontal positions and vertical elevations associated with each single-beam sounding were postprocessed using differential corrections derived from the base/rover setup. Two GPS reference stations were used for the survey and were located at benchmarks U374 and REST. Applying the reference-station coordinates, GPS data acquired from the rover were processed to the concurrent GPS session data at the base station, using GrafNav version 8.5 software (Waypoint Product Group). The horizontal and vertical coordinates were recorded in the World Geodetic System of 1984 (WGS84) reference frame and exported as an ASCII file for each personal watercraft and each survey day.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Billy J. Reynolds
Contact_Position: Engineering Technician
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8067
Contact_Facsimile_Telephone: 727-502-8181
Contact_Electronic_Mail_Address: breynolds@usgs.gov
Process_Step:
Process_Description:
Single-Beam Data Processing: Single-beam soundings were merged with differentially processed GPS data and sound velocity profiles using Matlab (2015b). Each transect was visually inspected for elevation outliers and dropouts associated with wave-breaking in the surf zone and were corrected manually. Usually, the highest intensity return is generated by the surface of the seafloor. Breaking waves in the surf zone can create air bubbles in the water column and cause an erroneous peak in waveform intensity. Errors are then produced in the interpreted seafloor reflection. When this circumstance was suspected, a corrected seafloor elevation was manually digitized by analyzing the .bin data file, which contains the complete waveform trace recorded by the Odom. The soundings were then corrected for the speed of sound (table 1) associated with the mean water temperature and salinity. A moving-average filter was then applied to the soundings to reduce instrument noise and the depth variations associated with the pitch and roll of the PWC. The depth soundings (from the transducer to the seafloor) were then adjusted to the depth reading from the GPS antenna and subsequently to the WGS84 ellipsoid.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Single-Beam Datum Transformation: NOAA's VDatum v3.3 was used to transform single-beam data points (x,y,z data) from their data acquisition datum (WGS84) to the North American Datum of 1983 (NAD83) reference frame and the North American Vertical Datum of 1988 (NAVD88) elevation using the National Geodetic Survey (NGS) geoid model of 2012A (GEOID12A). For conversion from the WGS84 ellipsoid to NAVD88, there is a total of 5.4 cm of uncertainty in the transformation (http://vdatum.noaa.gov/docs/est uncertainties.html).
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Single-Beam Error Analysis: The accuracy of the single-beam soundings was evaluated by identifying locations where survey tracklines crossed and soundings from each line were within a horizontal distance of 0.25 m of each other. Evaluation of the trackline crossings indicated there was a root mean square (RMS) vertical uncertainty of 18.3 cm with a 1-cm bias between the two PWCs. Large elevation differences often appear near channels where elevations vary rapidly over short distances. The RMS error for PWC2, when crossing a trackline it previously surveyed, was 13.0 cm. When PWC1 crossed a trackline it previously surveyed, the RMS error was 16.8 cm. Since the bias between the PWC elevations was on the order of the Odom instrument accuracy (1cm +/- 0.7 percent depth), no adjustments were made. Applying the square root of the sum of the datum conversion uncertainty and the sounding uncertainty resulted in a combined vertical error of 17.7 cm. Horizontal uncertainty was assumed to be half of the vertical uncertainty (8.9 cm), at most.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Merging Transects: Using Matlab (2015b), partial lines (the result of restarting the line in the middle of a transect) were subsequently merged with similar segments to create single, seamless lines. When repetitions were present, only a single line was retained. The data were then combined into a single ASCII file consisting of position, elevation, line number, vessel number, and time of sampling.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Ground-Based Error Analysis: Using Matlab (2015b), ground-based GPS elevation errors were calculated by segmenting temporally sequential elevations into 10-minute segments and identifying crossings between segments where an elevation was within at least 0.25 m. The calculated RMS of those intersections is 8.5 cm. Elevation differences between the ground-based and single-beam data points indicated the ground-based elevations were 1.8 cm higher than elevations recorded using PWCs. Given the high degree of uncertainty arising from variations in the stride of the backpack surveyor over a subaqueous surface, the data were adjusted to the single-beam elevation at the crossings. The adjusted positions, elevation, and time of sampling were saved as an ASCII file.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Extract Wilderness Breach XYZ: Single-beam x,y,z data were imported into Esri’s ArcGIS using the “create feature class from xy table” tool, in ArcCatalog. Using ArcMap, a polygon was then created surrounding the data points within the shoreface of Fire Island. The polygon vertices were converted to points using the “feature vertices to points” tool, “add xy coordinates” tool, and exported as an ASCII file using the “export feature attribute to ASCII” tool. This ASCII file was subsequently imported into Matlab (2015b). Any single-beam data within or on this polygon were then extracted and saved as an ASCII file.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Create Digital Elevation Model: The wilderness breach single-beam and ground-based x,y,z data were imported into ArcGIS using the "create feature class” from the “xy table” tool in ArcCatalog. The dataset was then subsampled using the "subset features" and 10 percent of each dataset was removed to provide an estimate of the elevation uncertainty. The remaining 90 percent of each dataset was used to create a triangulated irregular network (TIN) using the "create TIN" tool. The TIN was subsequently converted into a raster file using the "TIN to Raster" tool with a cell size of 25 meters. The raster was exported as an ASCII file using the "ASCII to Raster" tool.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Remove Extrapolated Cells: The Raster ASCII file was imported into Matlab (2015b), and any interpolated grid cells that were more than two cell sizes (50 m) away from a wilderness breach data point were set to Not A Number (NaN). The raster data were then exported as an ArcGIS ASCII file from Matlab (2015b) and imported into ArcMap using the "ASCII to Raster" tool.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Evaluate Digital Elevation Model Uncertainty: The raster was sampled at the positions of the 10-percent-removed data using the "extract values to points" tool and a .csv file was saved from each data table for the personal watercraft and backpack data. Using Matlab (2015b), the sampled data were compared to the subset data and the root mean square differences were calculated. The vertical RMS error was found to be 20 cm.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Process_Step:
Process_Description:
Convert Raster Format: In ArcCatalog, a raster dataset was created using the "create raster dataset" tool with a .tif image format and 64-bit pixel type. The shoreface raster was then imported into this dataset using the "mosaic" tool.
Source_Used_Citation_Abbreviation: 201505_Wilderness_Breach_DEM.tif
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Person: Timothy R. Nelson
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th St. S
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@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: 115
Column_Count: 86
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: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 25
Ordinate_Resolution: 25
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum 1988
Altitude_Resolution: 0.01 m
Altitude_Distance_Units: meter
Altitude_Encoding_Method: Attribute values
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Contact_Person: Timothy R. Nelson
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: 727-502-8098
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: trnelson@usgs.gov
Resource_Description: 201505_Wilderness_Breach_DEM.tif
Distribution_Liability:
This digital 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: GeoTIFF
File_Decompression_Technique: ZIP
Transfer_Size: 0.0287
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20210922
Metadata_Review_Date: 20160824
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Contact_Person: Kathleen E. Wilson
Contact_Position: Researcher
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: 727-502-8099
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: kwilson@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/201505_Wilderness_Breach_DEM.html>
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