U.S. Geological Survey
2021
Ground control point, navigation, and elevation data from pole surveys at Head of the Meadow Beach, Truro during field activity 2020-015-FA on March 4 and 6, 2020
1.0
tabular digital data
data release
DOI:10.5066/P9KSG1RQ
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
https://doi.org/10.5066/P9KSG1RQ
https://cmgds.marine.usgs.gov/data/field-activity-data/2020-015-FA/
C. Sherwood
P. Traykovski
J. Over
J. Borden
S. Brosnahan
E. Marsjanik
M. Martini
2021
Topographic and bathymetric data, sediment samples, and imagery collected at Head of the Meadow Beach, Truro in March 2020, U.S Geological Survey Field Activity 2020-015-FA
1.0
tabular digital data
data release
DOI:10.5066/P9KSG1RQ
Reston, VA
U.S. Geological Survey
Over, J.R., Sherwood, C.R., Traykovski, P., Brosnahan, S.M., Martini, M.A., Marsjanik, E., Borden, J., 2021, Topographic and bathymetric data, sediment samples, and beach imagery collected at Head of the Meadow, Truro in March 2020, U.S Geological Survey Field Activity 2020-015-FA: U.S Geological Survey data release, https://doi.org/10.5066/P9KSG1RQ.
https://doi.org/10.5066/P9KSG1RQ
The data in this release map the beach and nearshore environment at Head of the Meadow Beach in Truro, MA and provide environmental context for the camera calibration information for the 2019 CoastCam installation that looks out at the coast shared by beachgoers, shorebirds, seals, and sharks. This is related to the field activity 2020-015-FA and a collaboration with the National Park Service at Cape Cod National Seashore to monitor the region that falls within the field of view of the CoastCam, which are two video cameras aimed at the beach. On March 4, 6, and 10, 2020, U.S Geological Survey and Woods Hole Oceanographic Institution (WHOI) scientists conducted field surveys to collect position and orientation information for the CoastCam cameras and map the field of view. Elevation data were collected using a real time kinematic – satellite navigation system (RTK-GNSS) receiver attached to a pole and walked on the beach. Point data of the beach face were collected along transects and at periodic locations of plywood targets moved throughout the day within the CoastCam view. Grain-size analysis was performed on sediment samples collected with a spade along multiple profiles from the bluff base to the intertidal zone. Images of the beach were taken with a camera (Ricoh GRII) and a post-processed kinematic (PPK) system attached to a kitesurfing kite, and high-precision targets (AeroPoints) were used as ground control points. Bathymetry was collected in the nearshore using a single-beam echosounder mounted on a surf capable self-righting electric autonomous survey vehicle. Agisoft Metashape (v. 1.6.1) was used to create a digital elevation model with the collected imagery and this was merged with the bathymetry in MatLab (v. 2020) to create a continuous topobathy product.
The navigation and point data can be used to ground truth the digital elevation model in the larger work and be used in the external calibration of the Coastcam.
For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-015-FA.
20200304
20200306
ground condition, no survey on 20200305, only AeroPoint data was collected on 20200306
Not planned
-70.080040
-70.075100
42.053166
42.050199
USGS Metadata Identifier
USGS:d9deb7b7-6f49-445e-a01e-9215d95c9cea
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
GPS navigation
USGS Thesaurus
GPS measurement
geolocation measurement
datasets
ISO 19115 Topic Category
geoscientificInformation
oceans
location
None
USA
Truro
Massachusetts
Head of the Meadow Beach
Cape Cod National Seashore
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Jin-Si Over
U.S. Geological Survey
mailing and physical address
U.S. Geological Survey
Woods Hole
MA
02543-1598
508-548-8700 x2269
jover@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2020-015-FA/data/imagery/2020015FA_Truro_navigation_browse.JPG
Browse graphic of the spatial distribution of the navigation/elevation points from surveys and ground control deployments at Head of the Meadow Beach, MA
JPG
Positions and elevations are verified by external sources, ex: OPUS Solutions for the receivers, see Positional_Accuracy section.
The files contain real-time kinematic satellite (RTK-GNSS) navigation and elevation data collected on foot using two receivers (Spectra Precision SP80 GNSS) corrected to a base station set up in the parking lot on March 04 and ground control points (AeroPoints) deployed on March 06 during USGS field activity 2020-015-FA.
Points from the foot survey were edited for quality control and some points were removed due to obvious errors (such as lack of attribute label or recording point when rover pole was on the ground), this can explain non-consecutive Point Labels. Users are advised to read the rest of the metadata record carefully for additional details.
Calculated RTK horizontal positions have an accuracy of +/- 30 centimeters. AeroPoint targets have theoretical 1 cm horizontal absolute accuracy.
Vertical accuracy of the calculated vertical elevation above datum is +/- 1 centimeter. AeroPoint targets have a theoretical 5 cm vertical absolute accuracy.
The RTK-GNSS data was collected and processed in the following manner:
1. A base station was set up in the parking lot on an established benchmark in the Head of the Meadow Parking lot and left on for 7 hours. An OPUS solution was calculated for the Benchmark and two Reference Marks.
2. The two Spectra receivers were localized to the base station. The height of rover #2 is 1.9820 m, rover #3 is 1.9819 and both were collecting RTK data in NAD83(2011) Zone 19N using Geoid 12B.
3. Rovers were then walked along the beach along nine pre-described transects perpendicular to the shoreline with one shoreline parallel transect along the berm taking points at least every 1-2 meters. Points were also taken at the top of the bluff and at the base of the bluff to characterize the slope.
4. In order to calibrate the CoastCams looking down from the bluff to the beach, five plywood checkerboard targets were placed propped up on the beach facing towards the CoastCam. These were measured with the rovers at the intersection of the sand and the middle of the target. The same targets were moved five times, so the same attribute label may have a different time, elevation, etc.
5. The RTK data is exported as CSV files using SurvCE (http://survce.com/home).
6. Rover data was manually redistributed into two CSV files. The first, 2020015FA_Truro_nav_transects.csv contains all the data collected to ground truth the survey site; transects, bluff points, and the benchmark measurements. The second, 2020015FA_Truro_nav_CoastCamtargets.csv, contains the positions of the plywood targets and the two CoastCam video cameras on the bluff.
20200306
Jin-Si Over
U.S Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd
Woods Hole
MA
02543
508-458-8700 x2269
jover@usgs.gov
The ground control points (AeroPoints) targets were processed with the following steps:
1. Eleven AeroPoints were deployed evenly spaced across the survey area and left on for a minimum of 3 hours to collect GNSS data.
2. Once connected to Wifi, the AeroPoint data is uploaded and is run through a post-processing kinematic algorithm and is exported with X,Y, and Z variances in the horizontal datum NAD83(2011) to produce latitude, longitude, and ellipsoid heights and then the GEOID 12B was used to produce orthometric heights. These are exported to a CSV file named 2020015FA_Truro_AeroPoints.
20200306
Peter Traykovski
Woods Hole Oceanographic Institute
Associate Professor
mailing and physical address
226 Woods Hole Rd, #MS 12
Woods Hole
MA
02543
508-289-2638
ptraykovski@whoi.edu
The 2020015FA_Truro_nav_transects.csv file was converted to a shapefile using ArcGIS 10.7.1, by right-clicking on the CSV in the catalog window and selecting using Create Feature Class - From XY data. The x-coordinate set to Easting and the y-coordinate set to Northing. The coordinate system of the input coordinates was set to the planar coordinate system NAD83(2011)/UTM Zone 19N. The CSV was saved as the shapefile 2020015FA_Truro_transects.
20200930
Jin-Si Over
U.S Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd
Woods Hole
MA
02543
508-458-8700 x2269
jover@usgs.gov
Corrected a thesaurus keyword.
20210514
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
566
Universal Transverse Mercator
19
0.999600
-69.000000
0.000000
500000.000000
0.000000
row and column
1
1
meters
North American Datum of 1983 (National Spatial Reference System 2011)
GRS_1980
6378137.000000
298.257224
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
2020015FA_Truro_nav_transects.csv has 579 data records, 2020015FA_Truro_nav_CoastCamTargets.csv has 32 data records, and 2020015FA_Truro_nav_AeroPoints.csv has 11 data records.
Point positions and elevations, attributes are treated as if all CSV files are combined.
U.S. Geological Survey
INFO
USGS Field Activity Number
USGS
2020-015-FA
USGS year, ID, and Field Activity
USGS
GPS_ID
An identifier for the Spectra Precision equipment used to collect survey data
USGS
2
3
999
Null value
USGS
Point_Label
Unique point identification number, non-consecutive.
USGS
1
1452
Attributes
Non-unique identifier for the type of feature measured in the table array.
USGS
BLUFFBASE, BM1_OPEN, BM1_CLOSE, RM1_OPEN, RM1_CLOSE, LS-BERM, TRAN#, TARGET P#, CAM-01, CAM-02, ac########
TARGET P#, where the # is a value between 1 and 6; BM and RM stand for Benchmark and Reference Mark with CLOSE and OPEN referring to the end or beginning of the survey and OPUS referring the Online Positioning service locations on the date collected; CAM-01 and CAM-02 are the locations of the CoastCams; TRAN #, where TRAN represents the transect and the # is a value between 1 and 9; BLUFFBASE and LS-BERM refer to points taken off transect either at the bluff or alongshore; and ac######## refer to AeroPoint IDs, ac followed by a string of eight numbers and letters.
USGS
Northing
Feature location Y-Coordinate (NAD83(2011)/UTM Zone 19N)
USGS
4655914.799
4656240.399
meters
Easting
Feature location X-Coordinate (NAD83(2011)/UTM Zone 19N)
USGS
410626.436
410980.159
meters
Orthometric_height
Feature location Z-Coordinate (NAVD88) using GEOID 12B
USGS
-0.938
27.155
meters
Latitude
Feature location latitude (NAD83(2011))
USGS
42.05025592
42.05316579
decimal degrees
Longitude
Feature location latitude (NAD83(2011))
USGS
-70.08003955
-70.07575428
decimal degrees
Ellipsoid_height
Feature height (NAD83(2011) GRS80)
USGS
-24.790
-22.355
meters
999
Null value
USGS
Date
Feature date
USGS
20200304
20200306
YYYYMMDD
Time_EST
Feature time of initiation in Eastern Standard Time (EST)
USGS
07:32:50
13:35:58
HH:MM:SS EST
999
Null value
USGS
These attribute definitions describe each column of information in the CSV files with the exception of additional information in the last three columns of the 2020015FA_Truro_nav_AeroPoints.csv. Those columns contain the X, Y, and Z variance, in mm, of the AeroPoint position. Null values (999) indicate the attribute was not calculated or applicable. Trailing and leading zeros may not appear in the csv and so some values may not display as many significant digits as described.
USGS Field Activity 2020-015-FA
U.S. Geological Survey
Jin-Si Over
Geographer
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-458-8700 x2269
jover@usgs.gov
2020015FA_Truro_navigation.zip contains the CSV file 2020015FA_Truro_nav_transects.csv and a shapefile (2020015FA_Truro_nav_transects.shp and additional files that make up a shapefile). The CSV files 2020015FA_Truro_nav_CoastCamtargets.csv and 2020015FA_Truro_nav_AeroPoints.csv are provided as separate files.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
CSV
Exported from Excel Office 365 16.01
The CSV files contain survey and ground control (AeroPoint) data
Use WinZip, 7zip, Peazip or pkUnzip
0.064
https://cmgds.marine.usgs.gov/data/field-activity-data/2020-015-FA/
https://doi.org/10.5066/P9KSG1RQ
The first link in the list above is to the field data page and the second link is to the publication landing page.
Shapefile
ArcGIS 10.7.1
The zip file contains a shapefile format of survey data.
Use WinZip, 7zip, Peazip or pkUnzip
0.55
https://cmgds.marine.usgs.gov/data/field-activity-data/2020-015-FA/
https://doi.org/10.5066/P9KSG1RQ
The first link in the list above is to the field data page and the second link is to the publication landing page.
None.
The zip file contains data in CSV and Esri shapefile formats. The user must have software capable of uncompressing the zip file and reading the data formats.
20210514
Jin-Si Over
U.S. Geological Survey
Geographer
mailing and physical
U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2269
jover@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
None
None