U.S. Geological Survey
20220131
Low-altitude aerial imagery collected from a Helikite at Head of the Meadow Beach, Truro during field activity 2021-014-FA on February 4, 2021
1.0
tabular digital data
data release
DOI:10.5066/P9D94NZ3
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/P9D94NZ3
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/
J. Over
C. Sherwood
P. Traykovski
2022
Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Head of the Meadow, Truro in February 2021, U.S. Geological Survey Field Activity 2021-014-FA
1.0
tabular digital data
data release
DOI:10.5066/P9D94NZ3
Reston, VA
U.S. Geological Survey
Over, J.R., Sherwood, C.R., and Traykovski, P.A., 2022, Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Head of the Meadow, Truro in February 2021, U.S. Geological Survey Field Activity 2021-014-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9D94NZ3
https://doi.org/10.5066/P9D94NZ3
These data map the beach and nearshore environment at Head of the Meadow Beach in Truro, MA, providing updated regional context for the 2019 CoastCam installation. CoastCam CACO-01 are two video cameras aimed at the beach that view the coast shared by beachgoers, shorebirds, seals, and sharks. These data were collected as part of field activity 2021-014-FA and a collaboration with the National Park Service at Cape Cod National Seashore to monitor the region. In February 2021, U.S. Geological Survey and Woods Hole Oceanographic Institute (WHOI) scientists conducted field surveys to re-map the field of view of the CoastCam. Aerial images of the beach for use in structure from motion were taken with a camera (Ricoh GRII) and a post-processed kinematic (PPK) system attached to a helium powered balloon-kite (Helikite). High-precision GPS 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 Small Surf Vehicle (SSV). Agisoft Metashape (v. 1.7.2) 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.
Images and positions are used in structure from motion to produce the derivitive elevation model and orthomosaic.
Bounding coordinates are based on image positions and may not reflect the full extent of the final product. For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-014-FA.
20210204
ground condition; single survey day: aerial imagery was collected on February 4, 2021.
Not planned
-70.079080
-70.074761
42.052749
42.050378
USGS Metadata Identifier
USGS:aa37f584-3a38-4dcc-b9ba-08aa8a435be2
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
shoreline
3-band imagery
shoreline photographs
photographs
JPG
low-altitude aerial imagery
aerial imagery
UAS
Unmanned aerial system
geotagged photos
Marine Realms Information Bank (MRIB) keywords
aerial and satellite photography
USGS Thesaurus
remote sensing
aerial photography
image collections
ISO 19115 Topic Category
geoscientificInformation
oceans
location
Common geographic areas
United States
Truro
Massachusetts
Cape Cod
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.
Jin-Si Over
U.S. Geological Survey
mailing and physical address
U.S. Geological Survey 384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2269
jover@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Imagery/2021014FA_Truro_imagery_browse.JPG
Example still image of Head of the Meadow Beach, Truro, MA
JPEG
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Imagery/2021014FA_Truro_HelikiteCameraAttachment_browse.jpg
Photograph showing how the camera, GNSS, and antenna configuration attaches to the Helikite.
JPG
Jin-Si R. Over
Chris R. Sherwood
Peter A. Traykovski
Sandra M. Brosnahan
Marinna A. Martini
Eric Marsjanik
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
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
This publication is the original/first survey data of Head of the Meadow beach from 2020.
https://doi.org/10.5066/P9KSG1RQ
The camera (Ricoh GRII HD) used on the kite acquires 16.2 megapixel photos, with file sizes generally between 4 and 6 MB on disc, depending on image complexity. The GPS used on the kite has theoretical vertical and horizontal accuracies of 5 meters.
One flight was flown at a target elevation of 40-50 m to map the Head of the Meadow Beach shoreline and bluff face in Truro, MA, on February 4, 2021.
Photographs were captured every 10 seconds for a total of 289 images, but only 222 are provided; images taken while the Helikite was launched and recovered were removed. All photos included have location information. Users are advised to read the rest of the metadata record carefully for additional details.
Though the images do not represent spatial data, the spatial information is embedded in the photo and available in the EXIF header of each image, which is derived from the provided Helikite navigation file (2021014FA_Truro_f1_photolocations.csv) in the larger work citation. The location information was acquired from a GNSS receiver (EMLID Reach M2) in PPK mode with a Multi-band GNSS antenna and hot shoe adapter with an estimated horizontal accuracy of 1 cm.
Though the images do not represent spatial data, the spatial information is available in the EXIF header of each image, which is derived from the provided Helikite navigation file (2021014FA_Truro_f1_photolocations.csv) in the larger work citation. The location information was acquired from a GNSS receiver (EMLID Reach M2) in PPK mode with a multi-band GNSS antenna and hot shoe adapter with an estimated vertical accuracy of 2 cm.
These JPG images were collected with a camera (Ricoh GRII HD) labeled 'r##', where 'r' indicates a Ricoh camera, and the following 2 digits normally indicate the camera ID. The camera was wired to the GNSS receiver and duct taped together, then hung from the Helikite (2021014FA_Truro_HelikiteCameraAttachment_browse.JPG) so that the camera faced downward. The Helikite was on a 50 m string and kitesurfing harness; together the Helikite and gear were walked down the beach. The horizontal positions and elevations of each image (2021014FA_Truro_f1_photolocations.csv) were recorded from the GNSS receiver (EMLID Reach M2), which were processed in PPK mode using the MASS CORS network. The navigation data was added to the image EXIF information after the flight as described in the process steps. It is recommended when using the imagery for photogrammetric purposes to also use the Aeropoint locations (see larger work citation Navigation: 2021014FA_Truro_nav_AeroPoints.csv) as ground control points.
20210204
Peter 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 GNSS navigation data was processed in Inertial Explorer (https://novatel.com/products/waypoint-software/inertial-explorer, version 8.70.8722). In the software, the data were processed using an 'Antenna Height' of 0.0 m to indicate that there was no offset from the GPS to the camera. The positions were processed in the NAD83(2011) datum, providing the Latitude, Longitude, and H_Ell_m attributes and then Geoid 12B was applied using NAVD88 as the vertical datum and UTM Zone 19N for the horizontal coordinate reference system to produce the Northing, Easting, and H_Ortho_m attributes.
All of the attributes here are provided in the 2021014FA_Truro_f1_photolocations.csv but only the latitude, longitude, and H_Ortho_m (NAVD88) were embedded in the image header.
202102
Peter 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 images acquired with the camera were geotagged and processed to add additional information required by the USGS to the EXIF headers using ExifTools (https://exiftool.org/, version: 12.06), and the files were renamed to a unique identifier using Namexif (http://www.digicamsoft.com/softnamexif.html, version 2.1) to avoid any possibility of duplicate names. These steps are described here.
1. Using the GNSS navigation from the previous step, ExifTools was used to geotag each photo with the GPSDateStamp, GPSTimeStamp, GPSLatitude, GPSLongitude, and GPSAltitude stored in a csv file with the command:' -geotag "C:\directory\name\Geotags.csv" -geosync=+23 C:\directory\name\of\photos'
where the -geosync command tells the exiftools that the GPS and photo time are offset by 23 seconds. The TimeStamp is in UTC, the latitude and longitude geotags are in NAD83(2011), and the altitude geotag is the H_Ortho_m in NAVD88 (m). The first row of the CSV are the headers; the first column is SourceName (unique image names), and the rest of the columns are the geotags listed in Step 1. Keywords were added with the following command in the directory with all the photographs: exiftool -sep ", " -iptc:keywords="Head of the Meadow Beach, Massachusetts, 2021-014-FA, Ricoh, USGS, aerial imagery" *.JPG
2. Additional EXIF information was added in the directory with all the photos with the command: exiftool -csv=directory\name\EXIF_tags.csv *.JPG
Where the CSV file has the attributes below as headings.
To read out the photo information to a csv when in the direcotry with the photos the command is: exiftool -csv -f -filename -GPSDateStamp -GPSTimeStamp -GPSLongitude -GPSLatitude -n -Artist -Contact -Comment -Credit -Copyright -ImageDescription -OriginalFileName -AttributionURL -Event -GPSAreaInformation -GPSMapDatum *.JPG > directory/name/out.csv
Tags may be added or removed to the command above depending on the information desired.
3. All the JPG images were renamed with Namexif to ensure unique filenames and compliance with the USGS Coastal and Marine Hazards and Resources Program's best practices for image naming convention. Images were renamed with the field survey ID prefix; flight number, and ID that distinguishes USGS cameras by make/camera number, the image acquisition date, coordinated universal time (UTC) in ISO8601 format, and a suffix with the original image name. For example, image name '2021014FA_f01r02_20200306T165822Z_M1040356.JPG', 2021014FA is the survey ID, f01 is the flight number, r02 is the internal camera ID, and 20200306 is the UTC date in the format YYYYMMDD. A 'T' is used to separate UTC date from UTC time in format HHMMSS followed by a Z, and M1040356.JPG is the original raw photo name appended to the end of the new filename. Because GPS data was collected in UTC and had a 23 second offset from the time produced by the camera (EST), the time in Namexif was shifted +4:00:23.
20210623
Jin-Si Over
U.S. Geological Survey
Geographer
mailing and physical address
U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2269
jover@usgs.gov
Update the publication date to 'go live' date. Modified browse graphic name to be the URL to the browse graphic. This work done on 20220307. Add PID to metadata (20220411). Any edits to the metadata also include an update to the metadata date.
20220411
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
embedded in EXIF
0.000001
0.000001
Decimal degrees
North American Datum of 1983 (National Spatial Reference System 2011)
GRS_1980
6378137.0
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
2021014FA_Truro_f1_photolocations.csv contains 222 data records.
The CSV file contains the post-processed Helikite navigation GNSS data (approximate position of the camera at the moment of each image capture).
USGS
ImageName
File names of individual images, see the Data_Quality_Information and Process_Description for file naming convention.
USGS
Character string.
UTC_Time
Time in HH:MM:SS of each corrected camera position in coordinated universal time (UTC).
Processor defined
15:06:34
15:44:54
HH:MM:SS
Latitude
Post-processed interpolated latitude of kite GNSS antenna position based on time of each image capture, in decimal degrees (NAD83[2011]).
USGS
42.050378
42.052749
decimal degrees
Longtitude
Post-processed interpolated longitude of kite GNSS antenna position based on time of each image capture, in decimal degrees (NAD83(2011)). Negative values represent W.
USGS
-70.079080
-70.074761
decimal degrees
H_Ell_m
Post-processed height in meters of kite GNSS antenna position based on time of each image capture using the NAD83(2011) reference ellipsoid.
None
-7.101
17.013
meters
Northing
Post-processed interpolated X-coordinate of kite GNSS antenna position based on time of each image capture, in NAD83(2011)/UTM Zone 19N.
USGS
4655929.874
4656195.668
meters
Easting
Post-processed interpolated Y-coordinate of kite GNSS antenna position based on time of each image capture, in NAD83(2011)/UTM Zone 19N.
USGS
410705.055
411061.460
meters
H_Ortho_m
Post-processed interpolated Z-coordinate of kite GNSS antenna position based on time of each image using NAVD88 correction with Geoid 18.
USGS
20.483
44.598
meters
The attributes Latitude, Longitude, H_Ortho_m, and UTC_Time are included in the image headers as GPSLatitude, GPSLongitude, GPSAltitude, and GPSTimeStamp, respectively. A GPSMapDatum header is also included in the images specifying that the latitude and longitude are in NAD83(2011) and altitude is in NAVD88 Geoid12B.
USGS Field Activity 2021-014-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
The Windows 10 zip folder 2021014FA_Truro_f1.zip contains 222 JPG images and 2021014FA_Truro_f1_photolocations.csv contains the PPK GNSS navigation data.
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.
JPG
1.0.0
JPG
The 2021014FA_Truro_f1.zip file contains 222 JPGs.
Use WinZip, 7zip, Peazip or pkUnzip
1150
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Imagery/2021014FA_Truro_f1.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/
https://doi.org/10.5066/P9D94NZ3
The first link in the list above is to directly download the data, the second to the field data page, and the third link is to the publication landing page.
CSV
Exported from Excel Office 365 16.01
The 2021014FA_Truro_f1_photolocations.csv contains location data for the imagery.
0.26
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Imagery/2021014FA_Truro_f1_photolocations.csv
https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/
https://doi.org/10.5066/P9D94NZ3
The first link in the list above is to directly download the data, the second to the field data page, and the third link is to the publication landing page.
none
Use of these files requires software capable of opening JPG images and, if desired, capable of reading the associated EXIF information. Additionally, the location information is provided in a CSV file for the user to utilize with appropriate software.
20220411
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
local time
None
None