Peter A. Traykovski
Jin-Si R. Over
20220607
Topobathy Products in Pea Island National Wildlife Refuge, North Carolina in November 2020 and April, September, and October 2021
1.0
raster digital data
data release
DOI:10.5066/P9DPZZG2
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/P9DPZZG2
https://www.sciencebase.gov/catalog/item/623dcb84d34e915b67d65441
Jin-Si R. Over
Christopher R. Sherwood
Peter A. Traykovski
Sandra M. Brosnahan
Alex J. Olson
Noa R. Randall
2022
DUNEX topographic, bathymetric, and supporting GPS data collected in Pea Island National Wildlife Refuge, North Carolina 2020-2021
1.0
raster digital data, tabular digital data, remote-sensing image
data release
DOI:10.5066/P9DPZZG2
Reston, VA
U.S. Geological Survey
Over, J.R., Sherwood, C.R., Traykovski, P.A., Olson, A.J., Randall, N.R., and Brosnahan, S.M., 2022, DUNEX topographic, bathymetric, and supporting GPS data collected in Pea Island National Wildlife Refuge, North Carolina 2020-2021: U.S Geological Survey data release, https://doi.org/10.5066/P9DPZZG2.
https://doi.org/10.5066/P9DPZZG2
https://www.sciencebase.gov/catalog/item/623dca6cd34e915b67d65110
The data in this part of the release characterize the beach and nearshore environment at the USGS DUring Nearshore Event eXperiment (DUNEX) site on Pea Island National Wildlife Refuge (PINWR) and at the Basnight Bridge (BB), NC. In November 2020, April, September, and October 2021, USGS and Woods Hole Oceanographic Institute (WHOI) scientists conducted multiple field surveys to collect a topobathy elevation time series. Bathymetry for topobathy products was collected in the nearshore using a single-beam echosounder mounted on a surf capable self-righting electric autonomous survey vehicle. Topography is produced using GPS walking surveys or structure-from-motion (SfM) with the imagery and ground control point data provided in the larger citation. DUNEX is a multi-agency, academic, and non-governmental organization collaborative community experiment designed to study nearshore coastal processes during storm events. USGS participation in DUNEX will contribute new measurements and models that will increase our understanding of storm impacts to coastal environments, including hazards to humans and infrastructure and changes in landscape and natural habitats. Collected data are part of field activity 2021-029-FA and donated data 2020-024-DD and are related to field activity 2021-028-FA and 2021-032-FA.
Topobathy dataset was aquired to observe change over time from the dune to the nearshore.
Topobathy products are the interpolated topography (SfM or walking survey) data and the single beach echosounder bathymetry data in the larger citation section of the release. For more information about the data, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-024-DD and https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-029-FA. Bounding coordinates represent the maximum bounds of the raster’s provided in this dataset.
20201122
20201125
20201127
20210419
20210420
20210907
20210908
20210911
20210912
20210926
20210928
20211019
20211020
Ground condition; data collected on multiple days but surveys have been combined into topobathy grids: 20201122, 20201125, and 20201127; 20210419 and 20210420; 20210907 and 20210908; 20210926 and 20210928; 20211019 and 20211020.
As needed
-75.52598572
-75.45864965
35.76604133
35.67291791
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
DUNEX
WHOI
topobathy
USGS Thesaurus
remote sensing
single-beam echo sounder
topography
bathymetry
ISO 19115 Topic Category
geoscientificInformation
oceans
elevation
USGS Metadata Identifier
USGS:623dcb84d34e915b67d65441
Common geographic areas
United States
Pea Island
Dare
North Carolina
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Not for navigational use. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Not for navigational use.
Jin-Si R. Over
U.S. Geological Survey, Northeast Region: Woods Hole Coastal and Marine Science Center
mailing and physical address
U.S. Geological Survey
Woods Hole
MA
02543-1598
508-548-8700 x2269
jover@usgs.gov
https://www.sciencebase.gov/catalog/file/get/623dcb84d34e915b67d65441?name=PINWR_Topobathy_browse.JPG&allowOpen=true
Example elevation colored topobathy grid in Pea Island National Wildlife Refuge.
JPEG
All elevation values are internally consistent in relation to each other and are comparable to values of published topobathy in the area (e.g. 2022 USGS CoNED Topobathy DEM (1851 - 2020): Coastal Carolinas, available at https://www.fisheries.noaa.gov/inport/item/67013, accessed May 18, 2022).
These grids represent merged grids of single beam echo-sounder bathymetry data collected by Peter Traykovski (WHOI) and collected topographic data from the larger citation. Raw data is provided in the larger citation.
Not all combinations of topography and bathymetry were merged from the raw data. The best coverage and completeness of the topography and bathymetry collected within two days of each other were used to produce the merged products.
Navigation information was acquired from the GNSS receiver in PPK mode with a Multi-band GNSS antenna that has a theoretical horizontal accuracy of 1-5 cm and average reported SD of 1.0 cm. See the larger citation for detailed accuracy reports on the bathymetry and topography.
The location information was acquired from the GNSS receiver in PPK mode with a Multi-band GNSS antenna and hot shoe adapter with a theoretical horizontal accuracy of 1-5 cm and average reported SD of 1.6 cm. See the larger citation for detailed accuracy reports on the bathymetry and topography.
The bathymetry and topography data are provided in the larger citation. Data are merged using the following steps.
1. The data (x,y,z) from the DSM and Bathy grids were combined with the interpolation method regularizedata3d (bicubic interpolation) using a smoothness coefficient of 0.001 (appropriate for data with low noise where the input points nearly coincide with the output surface) by Jamal (2020).
2. The combined grid was then masked using 'roipoly' which returned the mask as a binary image, setting pixels inside the region of interest (ROI) polygon to 1 and pixels outside the ROI to 0. The boundary was determined by specifying the polygon vertices as the regularizedata3D outputs (x,y,z) from the previous step and prevented extrapolation beyond the tracklines of the Bathy and DSM extent.
3. The final merged GeoTIFF was created using the GRIDobj tool in the TopoToolbox (Schwanghart and Scherler, 2014) which used the interpolated grid and the mask from step 2 to create the final output.
4. Export gridded 1 m data in NAD83(2011)/UTM Zone 18N in NAVD88 meters, using Geoid 12B, as a GeoTIFF. Note that using NAVD88 as a height means that the depths are not true-depths but the elevation of the seafloor above or below the geoid.
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.
202203
Peter A. Traykovski
Woods Hole Oceanographic Institution
Associate Scientist
mailing and physical address
226 Woods Hole Rd, MS #12
Woods Hole
MA
02543-1598
508-289-2638
ptraykovski@whoi.edu
The grids were converted into cloud optimized GeoTiffs (cog) and assigned a nodata value of -3.402823E38 using gdal_translate with the following command: for %i in (.\*.tif) do gdal_translate %i .\cog\%~ni_cog.tif -co COMPRESS=LZW -co COPY_SRC_OVERVIEWS=YES -co BIGTIFF=YES -co TILED=YES -nodata value= -3.402823E38
Where i was the name of each geoTIFF section and there is an empty folder named cog in the directory.
20220512
Jin-Si R. Over
U.S. Geological Survey, Northeast Region: Woods Hole Coastal and Marine Science Center
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1258
508-548-8700 x2269
jover@usgs.gov
Raster
Universal Transverse Mercator
18
0.999600
-69.000000
0.000000
500000.000000
0.000000
row and column
1
1
meters
NAD83_National_Spatial_Reference_System_2011
GRS_1980
6378137.000000
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
2020024DD_PINWR_DUNEX_Topobathy_1m_1122-25-27_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on November 22 and 27, 2020 and walking survey topography from November 22 and 25, 2020 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-10.655
5.915
meters
2020024DD_PINWR_DUNEX_Topobathy_1m_0419-20_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on April 19 and 20, 2021 and walking survey topography from April 20, 2021 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-17.836
5.078
meters
2020024DD_PINWR_BB_Topobathy_1m_0420_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry and walking survey topography collected on April 20, 2021 at the Pea Island National Wildlife Refuge Basnight Bridge site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-11.079
0.684
meters
2021029FA_PINWR_DUNEX_Topobathy_1m_0907-08_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on September 7, 2021 and Helikite survey topography from September 8, 2021 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-8.019
7.629
meters
2021029FA_PINWR_DUNEX_Topobathy_1m_0911-12_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on September 12, 2021 and Helikite survey topography from September 11, 2021 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-17.319
8.237
meters
2021029FA_PINWR_DUNEX_Topobathy_1m_0926-28_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on September 28, 2021 and Helikite survey topography from September 26, 2021 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-9.982
7.644
meters
2021029FA_PINWR_DUNEX_Topobathy_1m_1019-20_cog.tif
A 1-m raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from bathymetry collected on October 19 and 20, 2021 and Helikite survey topography from October 19, 2021 at the Pea Island National Wildlife Refuge DUNEX site.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Elevation relative to NAVD88 (m) using Geoid 2012B
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-9.994
7.428
meters
There are seven topobathy grids represent elevation in meters relative to the NAVD88 datum. The cloud optimized GeoTIFFs have no-data values of -3.402823E38. The naming convention is as follows: the USGS field name 2020024DD or 2021029FA; location is Pea Island National Wildlife Refuge (PINWR) at either the DUNEX or Basnight Bridge (BB) site; product is Topobathy; resolution is 1-meter; and date is in MMDD-DD to provide context if data were collected on multiple days for the final grid.
USGS Field Activity 2021-029-FA and Donated Data 2020-024-DD
U.S. Geological Survey - ScienceBase
mailing and physical address
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
1-888- 275-8747
sciencebase@usgs.gov
Each file represents a merged interpolated topobathy grid of elevation values in Pea Island National Wildlife Refuge.
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
GeoTIFF
Merged grids of single beam bathymetric data collected by Peter Traykovski (WHOI) and topography data collected during field activity 2021-029-FA and from donated data 2020-024-DD.
21
https://www.sciencebase.gov/catalog/file/get/623dcb84d34e915b67d65441
https://www.sciencebase.gov/catalog/item/623dcb84d34e915b67d65441
https://doi.org/10.5066/P9DPZZG2
The first link in the list above is to directly download all of the data into one zip file (the transfer size), the second link is to the page where you can download the topobathy individually, the third link is to the publication landing page.
None.
These data are available as cloud optimized GeoTIFF rasters. To utilize these data, the user must have an image viewer, image processing, GIS software package capable of importing a GeoTIFF, and a way to unzip the raw data. 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/.
20220607
Jin-Si R. Over
U.S. Geological Survey, Northeast Region: Woods Hole Coastal and Marine Science Center
Geographer
mailing and physical
U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2269
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the person is no longer with USGS.
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998