Chelsea A. Stalk
Karen L.M. Morgan
Jenna A. Brown
Christopher R. Sherwood
20200408
Ground Control Point Locations and Photographs From North Topsail Beach and Camp Lejeune, North Carolina, June 2019
U.S. Geological Survey Data Release
doi:10.5066/P9R9DPFS
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://doi.org/10.5066/P9R9DPFS
Scientist from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) collected xyz locations for 53 Ground Control Points (GCP) in North Topsail Beach and within the Camp Lejeune Marine Corps Base, North Carolina, June 12-14, 2019. During this study, Global Positing System (GPS) data were collected using a single Spectra SP80 Global Navigation Satellite System (GNSS) receiver affixed to a 2-meter (m) survey pole. Additional attributes pertaining to each survey point have also been provided in 2019_330_FA_GCP_Final.csv as well as all photographs taken during data collection. Data are provided in the native format of the World Geodetic System of 1984 (WGS84) International Terrestrial Reference Frame of 2008 (ITRF08) ellipsoid heights, as well as in the North American Datum of 1983 (NAD83) ellipsoid and NAD83 North American Vertical Datum of 1988 (NAVD88), GEOID12B.
To georectify aerial imagery taken post-Hurricane Florence (landfall September 14, 2018), scientists from the USGS SPCMSC conducted a GPS survey of 53 individual GCP locations (39 pre-determined sites, 14 opportunistically-derived sites) in North Topsail Beach and within the Camp Lejeune Marine Corps Base on June 12-14, 2019, during Field Activity Number (FAN) 2019-330-FA. This dataset, 2019_330_FA_GCP.zip and all other provided data, consist of GPS horizontal and vertical position as well as elevation data collected within the residential areas of North Topsail Beach and along Onslow Beach within the Camp Lejeune Marine Corps Base, using a single GPS receiver performing 10-minute static occupations. Additional survey and data details are available from the Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-330-FA.
For the GPS data, the differential positioning was obtained through post-processing the base station data to the rover. ExifTool (version 4.0) was used to add the following to the header of each photograph: time of collection, GPS latitude, GPS longitude, keywords, credit, artist (photographer), caption, copyright, and contact information. Photographs can be opened with any JPEG-compatible image viewer.
20190612
20190614
ground condition
None planned
-77.439168
-77.255484
34.579861
34.484067
USGS Metadata Identifier
USGS:d677675d-a899-47e0-9318-331cd7e5e3cf
Global Change Master Science Directory (GCMD)
OCEANS > COASTAL PROCESSES > BARRIER ISLANDS
OCEANS > COASTAL PROCESSES > BEACHES
DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR
Marine Realms Information Bank (MRIB) Keywords
beach
topographic mapping
altimetry
Global Positioning System (GPS) observations
USGS Thesaurus
GPS measurement
topography
geology
geomorphology
marine geology
ISO 19115 Topic Category
geoscientificinformation
elevation
location
imageryBaseMapsEarthCover
Geographic Names Information System
North Topsail Beach
Marine Corps Base Camp Lejeune
Sneads Ferry
Onslow County
North Carolina
United States of America
None
2019
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. These data should not be used for navigational purposes.
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
727-502-8000
cstalk@contractor.usgs.gov
Funding and (or) support for this study were provided by the USGS Remote Sensing Coastal Change project and the Office of Naval Research Increasing the Fidelity of Morphological Storm Impact Predictions project. The authors would like to thank John Reeve, Operations Officer, and Jeremy Hoff, U.S. Marine Corps Staff Sergeant, for their coordination of the Camp Lejeune survey as well as Justin Birchler and Arnell Forde of the USGS - St. Petersburg, Florida for their thoughtful peer reviews.
Environment as of Metadata Creation: Microsoft Windows 10 Version 1709 (Build 16299.666) Service Pack 1; Environmental Systems Research Institute (Esri) ArcGIS 10.6.0.8321
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. All critical measurements were recorded manually and then digitally entered into their respective programs. Offsets between the antenna reference point (ARP) and the survey point were measured and accounted for in post-processing. The survey point and topographic survey foot are calibrated from the manufacturer to ensure interchangeability without induced offsets. Differential Global Positioning System (DGPS) coordinates were obtained using post-processing software packages (National Geodetic Survey’s (NGS) Online Positioning User Service (OPUS), and Waypoint Product Group’s GrafNav, version 8.7).
These datasets are from one field activity with consistent instrument calibrations.
This data release contains horizontal and vertical position as well as vertical elevation (xyz) GPS data from June 2019, collected in North Topsail Beach and Camp Lejeune, North Carolina. A total of 54 points were pre-determined prior to field efforts, prefix PT. Due to field conditions or inaccessibility, not all pre-determined points were surveyed. Additionally, some “opportunity points” were taken throughout the survey (labeled with OP prefix) at points deemed useful to the analysis during the survey. Opportunity point 6 is missing due to it being determined planned point 1 during a post-field analysis, and therefore was re-assigned PT01. Users are advised to read the complete metadata record carefully for additional details.
All static base station sessions were processed through OPUS, which is maintained by the National Oceanic and Atmospheric Administration (NOAA) and the NGS. The OPUS solutions were entered into a spreadsheet to compute a final, time-weighted position (latitude, longitude, and ellipsoid height) for the utilized base station. The time-weighted position for NGS benchmark AI0917 was compared against the published NGS coordinates, however, since the mark was visibly tilted, the final time-weighted value from the survey occupations was used in subsequent processing steps. The horizontal standard deviation of the combined survey occupations is 0.00009 latitude seconds (s) and 0.00038 longitude s. The kinematic (rover) trajectories were processed using GrafNav version 8.70. The horizontal standard deviation of each point location is provided within the final file and ranges from 0.006 to 0.027 m.
All static base station sessions were processed through the OPUS maintained by and NGS. The OPUS solutions were entered into a spreadsheet to compute a final, time-weighted position (latitude, longitude, and ellipsoid height) for the utilized base station. The time-weighted position for NGS benchmark AI0917 was compared against the published NGS coordinates, however, since the mark was visibly tilted, the final time- weighted value from the survey occupations was used in subsequent processing steps. The vertical standard deviation of the combined survey occupations is 0.008 m. The kinematic (rover) trajectories were processed using GrafNav version 8.70. The vertical standard deviation of each point location is provided within the final file and ranges from 0.009 to 0.044 m.
GPS Acquisition: A GPS base station was erected on NGS benchmark AI0917, which is located within the landscaped area between the road and the paved parking lot of the Topsail Reef Condominiums. The base station was continually occupied and equipped with an Ashtech Proflex 800 GPS receiver recording 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via an AeroAntenna Choke Ring antenna, recording at a rate of 1 s.
2018
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
727-502-8000
cstalk@contractor.usgs.gov
GPS Acquisition: The GPS rover data were collected under USGS FAN 2019-330-FA, utilizing a single Spectra Precision SP80 GNSS receiver mounted on a 2-meter survey pole with an attached tripod. Survey points utilized for this field activity consisted of survey precision point and topographic foot surveys, and were used interchangeably depending upon point location, terrain, and stability; both are calibrated at the same length and do not affect the measurements acquired. Static GPS data were recorded at 1-s intervals for a total of 600-s (10 minutes) at each survey location. 39 Optimal survey locations were pre-planned (prefix "PT" in data file), however, 14 opportunistic sites were chosen in the field (prefix “OP” in data file). Optimal points had open sky, clear identifiers that could be spotted easily in photographs, and limited relief from surrounding ground cover.
2019
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
(727) 502-8000
cstalk@contractor.usgs.gov
Differentially Corrected Navigation Processing: The final, time weighted base station coordinates were imported into GrafNav version 8.70 and the kinematic GPS data from the survey rover were post- processed to the concurrent GPS session data at the base station. During processing, steps were taken to ensure that the trajectories between the base and 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-s intervals and exported in American Standard Code for Information Interchange (ASCII) text format. The GPS data were processed in the WGS84 (ITRF08) geodetic datum and then exported in both WGS84 (ITRF08) ellipsoid heights as well as NAD83 NAVD88 using the GEOID12B model. All individual exports were then compiled into a single .xlsx file which was then saved as a .csv file, both of which are provided in this data release.
2019
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
(727) 502-8000
cstalk@usgs.gov
Exchangeable Image File (EXIF) and International Press Telecommunications Council (IPTC) headers were populated using the command-line application ExifTool (http://www.sno.phy.queensu.ca/~phil/exiftool). Metadata was written to all photographs using a script and batch processing to execute ExifTool with information for each of the photographs read from the CSV file. The metadata values for photograph creation include time, date, GPS position (latitude and longitude), comment, image description, artist (photographer), copyright, credit, contact, keywords, and caption.
20200108
Jenna A. Brown
USGS
Research Oceanographer
Physical and Mailing
1289 McD Dr
Dover
DE
19901
USA
302-213-5071
jennabrown@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
53
Universal Transverse Mercator
18N
0.999600
-75.000000
0.000000
500000.000000
0.000000
coordinate pair
0.6096
0.6096
Meters
World Geodetic System of 1984
WGS_84
6378137.0
298.257223563
World Geodetic System of 1984
0.001
Meters
Attribute values
2019_330_FA_GCP_Final.csv
Comma-delimited x,y,z file containing location, elevation, and other information regarding the ground control points surveyed in North Topsail Beach and Camp Lejeune North Carolina.
U.S. Geological Survey
GCP Identifier
Identifier associated with the individual ground control point.
U.S. Geological Survey
Planned survey points (designated by a “PT” prefix) were numbered from 1-54 and placed from south to north, not all points were surveyed due to field conditions. Opportunity points (designated by an “OP” prefix) were numbered consecutively.
Local Date
Local date of data collection in MM/DD/YYYY format.
U.S. Geological Survey
6/12/2019
6/14/2019
GMT Time
GMT time of the start of the survey occupation in HH:MM:SS format.
U.S. Geological Survey
11:30:19
23:39:02
Local Time
Local time-Eastern Standard Time (EST) of the start of the survey occupation in HH:MM:SS format.
U.S. Geological Survey
07:30:19
19:39:02
WGS84 (ITRF08) UTM18N Easting
WGS84 Universal Transverse Mercator (UTM) x-axis coordinate (Zone 18N).
U.S. Geological Survey
276008.831
293117.230
Meters
WGS84 (ITRF08) UTM18N Northing
WGS84 UTM y-axis coordinate (Zone 18N)
U.S. Geological Survey
3818531.752
3828765.570
Meters
WGS84 (ITRF08) Lat
WGS84 latitude
U.S. Geological Survey
34.4840747
34.5798691
Decimal Degrees
WGS84 (ITRF08) Long
WGS84 longitude
U.S. Geological Survey
-77.4391743
-77.2554897
Decimal Degrees
WGS84 Ellipsoid Height (m)
WGS84 ellipsoid height
U.S. Geological Survey
-38.092
-35.692
Meters
NAD83 (2011) UTM 18N Easting
NAD83 UTM x-axis coordinate (Zone 18N)
U.S. Geological Survey
276009.346
293117.742
Meters
NAD83 (2011) UTM 18N Northing
NAD83 UTM y-axis coordinate (Zone 18N)
U.S. Geological Survey
3818530.873
3828764.687
Meters
NAD83 (2011) Lat
NAD83 latitude
U.S. Geological Survey
34.4840669
34.5798612
Decimal Degrees
NAD83 (2011) Long
NAD83 Longitude
U.S. Geological Survey
-77.43916846
-77.25548393
Decimal Degrees
NAD83 Ellipsoid Height (m)
NAD83 Ellipsoid height in meters
U.S. Geological Survey
-36.686
-34.286
Meters
NAVD88 GEOID12B Orthometric Height (m)
NAVD88 orthometric height using the GEOID12B model.
U.S. Geological Survey
0.671
2.981
Meters
STDEV Horizontal (m)
Horizontal (x,y) standard deviation of the individual point
U.S. Geological Survey
0.006
0.027
Meters
STDEV Height (m)
Vertical (z) standard deviation of the individual point
U.S. Geological Survey
0.009
0.044
Meters
Notes
Notes pertaining to data acquisition
U.S. Geological Survey
Weather condition and site notes written in the field during GCP data and photograph collection.
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
(727) 502-8000
cstalk@usgs.gov
2019_330_FA_GCP_Final.csv, 2019_330_FA_GCP_Final.xlsx, *.jpg
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.
comma-delimited text, Microsoft Excel format, JPEG
ZIP
3.01
https://coastal.er.usgs.gov/data-release/doi-P9R9DPFS/data/2019_330_FA_GCP.zip
None
20201013
Chelsea A. Stalk
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Researcher III
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701-4846
USA
(727) 502-8000
cstalk@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998