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

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20220131
Title:
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
Edition: 1.0
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9D94NZ3
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher:
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Online_Linkage: https://doi.org/10.5066/P9D94NZ3
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: J. Over
Originator: C. Sherwood
Originator: P. Traykovski
Publication_Date: 2022
Title:
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
Edition: 1.0
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9D94NZ3
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
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
Online_Linkage: https://doi.org/10.5066/P9D94NZ3
Description:
Abstract:
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.
Purpose:
Images and positions are used in structure from motion to produce the derivitive elevation model and orthomosaic.
Supplemental_Information:
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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20210204
Currentness_Reference:
ground condition; single survey day: aerial imagery was collected on February 4, 2021.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Not planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.079080
East_Bounding_Coordinate: -70.074761
North_Bounding_Coordinate: 42.052749
South_Bounding_Coordinate: 42.050378
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:aa37f584-3a38-4dcc-b9ba-08aa8a435be2
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: shoreline
Theme_Keyword: 3-band imagery
Theme_Keyword: shoreline photographs
Theme_Keyword: photographs
Theme_Keyword: JPG
Theme_Keyword: low-altitude aerial imagery
Theme_Keyword: aerial imagery
Theme_Keyword: UAS
Theme_Keyword: Unmanned aerial system
Theme_Keyword: geotagged photos
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: aerial and satellite photography
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: remote sensing
Theme_Keyword: aerial photography
Theme_Keyword: image collections
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Theme_Keyword: location
Place:
Place_Keyword_Thesaurus: Common geographic areas
Place_Keyword: United States
Place_Keyword: Truro
Place_Keyword: Massachusetts
Place_Keyword: Cape Cod
Access_Constraints: None
Use_Constraints:
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.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si Over
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Electronic_Mail_Address: jover@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description: Example still image of Head of the Meadow Beach, Truro, MA
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Photograph showing how the camera, GNSS, and antenna configuration attaches to the Helikite.
Browse_Graphic_File_Type: JPG
Cross_Reference:
Citation_Information:
Originator: Jin-Si R. Over
Originator: Chris R. Sherwood
Originator: Peter A. Traykovski
Originator: Sandra M. Brosnahan
Originator: Marinna A. Martini
Originator: Eric Marsjanik
Publication_Date: 2021
Title:
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
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher:
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Other_Citation_Details:
This publication is the original/first survey data of Head of the Meadow beach from 2020.
Online_Linkage: https://doi.org/10.5066/P9KSG1RQ
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report:
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.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
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.
Lineage:
Process_Step:
Process_Description:
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.
Process_Date: 20210204
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter Traykovski
Contact_Organization: Woods Hole Oceanographic Institution
Contact_Position: Associate Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 226 Woods Hole Rd, MS #12
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-289-2638
Contact_Electronic_Mail_Address: ptraykovski@whoi.edu
Process_Step:
Process_Description:
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.
Process_Date: 202102
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter Traykovski
Contact_Organization: Woods Hole Oceanographic Institution
Contact_Position: Associate Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 226 Woods Hole Rd, MS #12
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-289-2638
Contact_Electronic_Mail_Address: ptraykovski@whoi.edu
Process_Step:
Process_Description:
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.
Process_Date: 20210623
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si Over
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Electronic_Mail_Address: jover@usgs.gov
Process_Step:
Process_Description:
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.
Process_Date: 20220411
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: embedded in EXIF
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name:
North American Datum of 1983 (National Spatial Reference System 2011)
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.001
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label:
2021014FA_Truro_f1_photolocations.csv contains 222 data records.
Entity_Type_Definition:
The CSV file contains the post-processed Helikite navigation GNSS data (approximate position of the camera at the moment of each image capture).
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: ImageName
Attribute_Definition:
File names of individual images, see the Data_Quality_Information and Process_Description for file naming convention.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: UTC_Time
Attribute_Definition:
Time in HH:MM:SS of each corrected camera position in coordinated universal time (UTC).
Attribute_Definition_Source: Processor defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 15:06:34
Range_Domain_Maximum: 15:44:54
Attribute_Units_of_Measure: HH:MM:SS
Attribute:
Attribute_Label: Latitude
Attribute_Definition:
Post-processed interpolated latitude of kite GNSS antenna position based on time of each image capture, in decimal degrees (NAD83[2011]).
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 42.050378
Range_Domain_Maximum: 42.052749
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Longtitude
Attribute_Definition:
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.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.079080
Range_Domain_Maximum: -70.074761
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: H_Ell_m
Attribute_Definition:
Post-processed height in meters of kite GNSS antenna position based on time of each image capture using the NAD83(2011) reference ellipsoid.
Attribute_Definition_Source: None
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -7.101
Range_Domain_Maximum: 17.013
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Northing
Attribute_Definition:
Post-processed interpolated X-coordinate of kite GNSS antenna position based on time of each image capture, in NAD83(2011)/UTM Zone 19N.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4655929.874
Range_Domain_Maximum: 4656195.668
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Easting
Attribute_Definition:
Post-processed interpolated Y-coordinate of kite GNSS antenna position based on time of each image capture, in NAD83(2011)/UTM Zone 19N.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 410705.055
Range_Domain_Maximum: 411061.460
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: H_Ortho_m
Attribute_Definition:
Post-processed interpolated Z-coordinate of kite GNSS antenna position based on time of each image using NAVD88 correction with Geoid 18.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.483
Range_Domain_Maximum: 44.598
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
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.
Entity_and_Attribute_Detail_Citation: USGS Field Activity 2021-014-FA
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si Over
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical
Address: U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Electronic_Mail_Address: jover@usgs.gov
Resource_Description:
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.
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: JPG
Format_Version_Number: 1.0.0
Format_Specification: JPG
Format_Information_Content: The 2021014FA_Truro_f1.zip file contains 222 JPGs.
File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip
Transfer_Size: 1150
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
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.
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: Exported from Excel Office 365 16.01
Format_Information_Content:
The 2021014FA_Truro_f1_photolocations.csv contains location data for the imagery.
Transfer_Size: 0.26
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
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.
Fees: none
Technical_Prerequisites:
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.
Metadata_Reference_Information:
Metadata_Date: 20220411
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si Over
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical
Address: U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Electronic_Mail_Address: jover@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None

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