U.S. Geological Survey
2021
Topobathy grid representing the backshore to the nearshore at Head of the Meadow Beach, Truro from data taken during field activity 2020-015-FA on March 6 and 10, 2020
1.0
raster 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
digital files
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.
This topobathymetric grid represents approximately 0.1778 square kilometers of the bluffs, dunes, beach, and nearshore of Head of the Meadow Beach in view of the CoastCam setup.
For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-015-FA.
20200306
20200310
ground condition. Two days of surveying. Bathymetry collected on March 10 and topography collected on March 6.
Not planned
-70.08045839
-70.07186358
42.05825375
42.05006994
USGS Metadata Identifier
USGS:ca4d364e-fe51-4467-8931-1c25288f0e89
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
USGS Thesaurus
remote sensing
single-beam echo sounder
bathymetry
topography
datasets
geospatial datasets
ISO 19115 Topic Category
geoscientificInformation
oceans
elevation
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
2020015FA_Truro_topobathy_browse.JPG
Depth-colored image of topobathy data collected onshore and offshore of Head of the Meadow Beach, Truro MA
JPG
The GNSS used on the ASV and to collect the imagery used to model the topography has theoretical vertical and horizontal accuracies of 5 meters. See the bathymetry and imagery datasets and metadata in the larger work citation for more details.
This file represents the merged 1 meter single beam echo-sounder bathymetry data and digital surface model created from imagery collected by Peter Traykovski or WHOI. These data were combined with post-processed kinematic (PPK) orthometric heights collected using a GNSS receiver (EMLID Reach M2) corrected to a base station (JAVA Triumph) onshore in GEOID 12B NAVD88.
This product represent the full extent of the topography and bathymetry available in the larger work citation. Users are advised to read the rest of the metadata record carefully for additional details.
Navigation information was acquired from a GNSS receiver (EMLID Reach M2) in PPK mode with a Multi-band GNSS antenna that has an estimated horizontal accuracy of 5 meters.
The location information was acquired from a GNSS receiver (EMLID Reach M2) in PPK mode with a Multi-band GNSS antenna and hotshoe adapter with an estimated vertical accuracy of 5 m.
The 25 cm Digital Surface Model (DSM) 2020015FA_Truro_DSM_25cm.tif and the 1 m bathymetry grid 2020015FA_Truro_bathymetry_1m.tif (available from the larger work citation) were merged and interpolated over a 1 m grid in MatLab v. 2020b with the following steps.
1. The data (x,y,z) from the DSM and Bathy grids are combined with the interpolation method regularizedata3d (bicubic interpolation) with a smoothness coefficient of 0.001 (used for data with low noise where the input points nearly coincide with the output surface) by Jamal (2020).
2. Combined grid is then masked using 'roipoly' which returns the mask as a binary image, setting pixels inside the region of interest polygon to 1 and pixels outside the ROI to 0. The boundary is determined by specifiying the polygon verticies as the regularizedata3D outputs (x,y,z) from the previous step and prevents extrapolation beyong the tracklines of the Bathy and DSM extent.
3. The final merged GeoTIFF is created using the GRIDobj tool in the TopoToolbox (Schwanghart and Scherler, 2014) which uses the interpolated grid from Step 1 and the mask from step 2 to create the final output. The GeoTIFF is output in NAD83(2011)/UTM Zone 19N in the vertical datum NAVD88 in meters.
Schwanghart, W., Scherler, D. (2014): TopoToolbox 2 – MATLAB-based software for topographic analysis and modeling in Earth surface sciences. Earth Surface Dynamics, 2, 1-7. [DOI: 10.5194/esurf-2-1-2014]
Jamal (2020). RegularizeData3D (https://www.mathworks.com/matlabcentral/fileexchange/46223-regularizedata3d), MATLAB Central File Exchange. Retrieved September 23, 2020.
20200917
Peter Traykovski
Woods Hole Oceanographic Institue
Associate Scientist
mailing and physical address
226 Woods Hole Rd, MS #12
Woods Hole
MA
02543
508-289-2638
ptraykovski@whoi.edu
Raster
Pixel
901
701
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_80
6378137.000000
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
There are no text attributes associated with a binary GeoTIFF image. GeoTIFF pixels represent elevation in meters in reference to NAVD88. No-data values is -32767.
USGS Field Activity 2020-015-FA
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
File 2020015FA_Truro_topobathy_1m.tif containing a 64-bit floating point GeoTIFF grid.
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.
GeoTIFF
1.0.0
64-bit floating point GeoTIFF format
File containing 64-bit floating point GeoTIFF representing a topobathy model of Head of the Meadow Beach, MA in March 2020.
1.7
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.
These data are available as a 64-bit floating point GeoTIFF image. To utilize these data, the user must have an image viewer, image processing, or GIS software package capable of importing a GeoTIFF image. Free spatial data viewers or proprietary software such as ArcGIS Earth or Google Earth Pro are capable of displaying the data. See: http://www.esri.com/software/arcgis-earth, or https://www.google.com/earth/desktop/. The zip file also contains associated metadata.
20210318
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