U.S. Geological Survey
20170424
Ground-Based XYZ Point Elevation Data Collected in May 2015 From Fire Island, New York
Tabular digital data
U.S. Geological Survey Data Series
DS 1049
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://pubs.usgs.gov/ds/1049/downloads/201505_Ground_Based_XYZ.zip
Timothy R. Nelson
Jennifer L. Miselis
Cheryl J. Hapke
Owen T. Brenner
Rachel E. Henderson
Billy J. Reynolds
Kathleen E. Wilson
20170424
Coastal bathymetry data collected in May 2015 from Fire Island, New York: The wilderness breach and shoreface
U.S. Geological Survey Data Series
DS 1049
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://doi.org/10.3133/ds1049
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.
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 objectives of the data collection were 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_Ground_Based_XYZ.zip, consists of elevation data collected with a backpack GPS system from subaerial and shallow flood shoals.
20150506
20150520
ground condition
None planned
-72.90793139
-72.88394551
40.73824263
40.72281912
USGS Metadata Identifier
USGS:03ef7af6-8b72-4a08-9f9a-c73776236db1
Global Change Master Science Directory (GCMD)
OCEAN > COASTAL PROCESSES > BARRIER ISLANDS
OCEAN > COASTAL PROCESSES > BEACHES
DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR
None
marine geology
bathymetry
shoals
interferometry
single-beam echosounder
U.S. Geological Survey
Hurricane Sandy Supplemental: Fire Island
Hurricane Sandy
ISO 19115 Topic Category
geoscientificinformation
elevation
oceans
None
Fire Island
Fire Island National Seashore
Long Island
New York
United States
None
2015
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.
U.S. Geological Survey
Timothy R. Nelson
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
727-502-8098
727-502-8182
trnelson@usgs.gov
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. Methods are employed to maintain data collection consistency aboard the platform. 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 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 GPS 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.
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.
This zip archive contains postprocessed horizontal position and vertical elevation point data (x,y,z) acquired with a backpack mounted GPS along the shoreface of Fire Island and the wilderness breach. This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the online Data Series and the rest of the metadata record carefully for additional details.
The GPS antenna and receiver acquisition configuration used at the reference station was duplicated on the survey backpack (rover). The base receiver and the rover receiver recorded their positions concurrently at 10Hz recording intervals throughout the survey. All processed measurements are referenced to the base-station coordinates. All static base station GPS sessions were submitted for processing to the National Oceanographic and Atmospheric Administration (NOAA) and National Geodetic Survey (NGS) On-Line Positioning User Service (OPUS) software. OPUS results provided an error measurement for each daily solution with a horizontal accuracy estimated as 0.5 cm root mean squared (RMS). Rover kinematic (rover) GPS data were processed with GrafNav v8.50 software by Novatel. The combined horizontal error for the rover was assumed to be, at most, half of the calculated vertical uncertainty.
4.3 cm
Static GPS data were processed using NOAA/NGS OPUS software and kinematic GPS data were processed with GrafNav v8.50 software by Novatel. Uncertainty was determined using Matlab (2015b).
The GPS antenna and receiver acquisition configuration used at the reference station was duplicated on the mount. The base receiver and the rover receiver recorded the positions concurrently at 10 Hertz (Hz) recording intervals throughout the survey. All processed measurements are referenced to the base-station coordinates. OPUS results provided an error measurement for each daily solution. Applying these error measurements, the vertical accuracy of the base station was estimated to be 0.3 cm root mean squared (RMS). The kinematic (rover) trajectories were processed using GrafNav version 8.50 software by Novatel, Inc. An RMS of the elevation differences at backpack GPS trackline crossings were evaluated to determine vertical uncertainty. The combined vertical error from the base station coordinate solutions and the rover trajectories was 8.5 cm.
8.5 cm
Static GPS data were processed using NOAA/NGS OPUS software and kinematic GPS data were processed with GrafNav v8.50 software by Novatel. Trackline crossing elevation uncertainty were determined using Matlab (2015b).
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 the 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.
2015
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Billy J. Reynolds
Engineering Technician
mailing and physical address
600 4th St. S
St. Petersburg
FL
33701
USA
727-502-8067
727-502-8181
breynolds@usgs.gov
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.
2015
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Owen T. Brenner
Geologist
mailing and physical address
600 4th St. S
St. Petersburg
FL
33701
USA
727-502-8085
727-502-8182
obrenner@usgs.gov
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.
2015
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Billy J. Reynolds
Engineering Technician
mailing and physical address
600 4th St. S
St. Petersburg
FL
33701
USA
727-502-8067
727-502-8181
breynolds@usgs.gov
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.
2015
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Owen T. Brenner
Geologist
mailing and physical address
600 4th St. S
St. Petersburg
FL
33701
USA
727-502-8085
727-502-8182
obrenner@usgs.gov
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.
201505_Ground_Based_XYZ.csv
2016
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Timothy R. Nelson
Geologist
mailing and physical address
600 4th St. S
St. Petersburg
FL
33701
USA
727-502-8098
727-502-8182
trnelson@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20201013
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Point
Point
69,557
Universal Transverse Mercator
18
0.999600
-75.000000
0.000000
500000.000000
0.000000
row and column
0.6096
0.6096
meters
North American Datum 1983
Geodetic Reference System 80
6378137.000000
298.257222101
North American Vertical Datum 1988
0.001 m
meter
Attribute values
201505_Ground_Based_XYZ.csv
Comma-delimited x,y,z file containing location, elevation, and date information collected with backpack GPS systems
U.S. Geological Survey
Easting_m
NAD83 UTM x-axis coordinate (Zone 18)
U.S. Geological Survey
676685
678673
Meter
Northing_m
NAD83 UTM y-axis coordinate (Zone 18N)
U.S. Geological Survey
4510140
4511806
Meter
elevation
z-value (elevation) in NAVD88
U.S. Geological Survey
-5.678
2.089
Meter
Date
Coordinated Universal Time (UTC) date of sample collection
U.S. Geological Survey
05/17/2015
05/19/2015
Comma-delimited x,y,z file containing UTM X, UTM Y locations and corresponding Z-elevation values, all in meters, as well as date of sample collection.
Nelson, T.R., Miselis, J.L., Hapke, C.J., Brenner, O.T., Henderson, R.E., Reynolds, B.J., Wilson, K.E., 20175, Coastal Bbathymetry Ddata Ccollected in May 2015 from Fire Island, New York—: tThe Wwilderness Bbreach and Sshoreface: U.S. Geological Survey Data Series ###, https://dx.doi.org/10.3133/ds###.
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Timothy R. Nelson
Geologist
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8098
727-502-8182
trnelson@usgs.gov
201505_Ground_Based_XYZ.csv
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.
ASCII
ZIP
0.657
https://pubs.usgs.gov/ds/1049/downloads/201505_Ground_Based_XYZ.zip
None
20210923
20160824
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Kathleen E. Wilson
Researcher
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8099
727-502-8182
kwilson@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998