Low-altitude aerial imagery collected from a Helikite at Head of the Meadow Beach, Truro on March 10, 2022

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20220919
Title:
Low-altitude aerial imagery collected from a Helikite at Head of the Meadow Beach, Truro on March 10, 2022
Edition: 1.0
Geospatial_Data_Presentation_Form: raster and tabular digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9GEVWG1
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/P9GEVWG1
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Jin-Si R. Over
Originator: Chris R. Sherwood
Originator: Peter A. Traykovski
Publication_Date: 2022
Title:
Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Head of the Meadow Beach, Truro, MA in March 2022, U.S. Geological Survey Field Activity 2022-015-FA
Edition: 1.0
Geospatial_Data_Presentation_Form: digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9GEVWG1
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 Beach, Truro, MA in March 2022, U.S. Geological Survey Field Activity 2022-015-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9GEVWG1.
Online_Linkage: https://doi.org/10.5066/P9GEVWG1
Online_Linkage:
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 2022-015-FA and a collaboration with the National Park Service at Cape Cod National Seashore to monitor the region. In March 2022, 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 (Sony a6000) and a post-processed kinematic (PPK) system attached to a helium filled balloon-kite (Helikite). High-precision GPS targets (AeroPoints) and numbered black and white tarps 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 surface vehicle. Agisoft Metashape (v. 1.8.1) was used to create a digital surface model with the collected imagery, which was merged with the bathymetry in MATLAB (v. 2020b) to create a continuous topobathy product.
Purpose:
Images and positions are used in structure from motion to produce the derivative surface 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=2022-015-FA.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20220310
Currentness_Reference:
ground condition; single survey day: aerial imagery was collected on March 10, 2022.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Not planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.07932595
East_Bounding_Coordinate: -70.07457069
North_Bounding_Coordinate: 42.05276130
South_Bounding_Coordinate: 42.04972995
Keywords:
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: JPEG
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
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:62dfef6ad34e952be90980bb
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 R. Over
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2297
Contact_Electronic_Mail_Address: jover@usgs.gov
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: JPEG
Native_Data_Set_Environment:
Adobe Lightroom Classic, EXIF Tool v. 12.06, Inertial Explorer v. 8.70.8722, Namexif v. 2.2
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
Cross_Reference:
Citation_Information:
Originator: Jin-Si R. Over
Originator: Christopher R. Sherwood
Originator: Peter A. 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
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
Other_Citation_Details:
This publication is the 2021 field data at Head of the Meadow Beach.
Online_Linkage: https://doi.org/10.5066/P9D94NZ3
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The camera (Sony a6000) used on the Helikite acquires 24 megapixel photos, with file sizes generally between 1 and 3 MB on disc, depending on image complexity. Some images are blurry due to movement and changing low light conditions. Images were corrected in Adobe Lightroom to improve color balance.
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 March 10, 2022.
Completeness_Report:
Photographs were captured every 2 seconds for a total of 1,646 images, but only 1,616 are provided; images taken while the Helikite was launched and recovered were removed. All photos included have location information.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Though the images do not represent spatial data, the latitude and longitude is embedded in the photos and available in the EXIF header of each image, which is derived from the provided Helikite navigation file (2022015FA_Truro_photolocations.csv). 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 to the camera with an estimated horizontal accuracy of 10 cm.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Though the images do not represent spatial data, the altitude is embedded in the EXIF header of each image, which is provided in the Helikite navigation file (2022015FA_Truro_f1_photolocations.csv). 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 to the camera with an estimated vertical accuracy of 5 cm.
Lineage:
Process_Step:
Process_Description:
These JPEG images were collected with a camera (Sony a6000) wired to the GNSS receiver 15 cm vertically offset from the focal point and hung from the Helikite (2022015FA_Truro_HelikiteCameraAttachment_browse.JPG) so that the camera faced downward. The Helikite was on a 60 m string and kitesurfing harness; together the Helikite and gear were walked up and down the beach to achieve overlapping images. The horizontal positions and elevations of each image (2022015FA_Truro_photolocations.csv) were recorded from the GNSS receiver (EMLID Reach M2) and 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 ground control point locations (see larger work citation Navigation: 2022015FA_Truro_nav_GCPs.csv). Photos were downloaded and adjusted in Adobe Lightroom Classic for brightness due to the changing cloud conditions.
Process_Date: 20220310
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). The positions were processed in the NAD83(2011) datum, which provided the Latitude, Longitude, and Ellipsoid attributes. 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 Altitude attributes. The GPS offset was not accounted for in this step, so the offset should be accounted for when deriving other products. All of the attributes here are provided in the 2022015FA_Truro_f1_photolocations.csv but only the latitude, longitude, and altitude (NAVD88) were embedded in the image header.
Process_Date: 202203
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 tag each photo with the following tags: Credit, Copyright, UsageTerms, ImageDescription, Artist, GPSAreaInfo, GPSMapDatum, GPSLatitude, GPSLongitude, and GPSAltitude stored in a csv file with the command:' -exiftool -csv="C:\directory\name\Geotags_EXIF.csv" C:\directory\name\of\photos *.jpg The first row of the CSV are the tag names; the first column is SourceName (unique image names). Keywords were added with the following command in the directory with all the photographs: exiftool -keywords="aerial imagery" -keywords="Head of the Meadow Beach" -keywords=Massachusetts -keywords="2022-015-FA" -keywords=USGS -overwrite_original *.jpg To read out the photo information to a csv when in the directory with the photos, the command is: exiftool -csv *.JPG > directory/name/allheaders_out.csv 2. All the JPEG images were renamed with Namexif (https://us.digicamsoft.com/softnamexif.html v 2.2 accessed April 2020) 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 '2022015FA_f01s6000_20220310T165822Z_image####.jpg', 2022015FA is the survey ID, f01 is the flight number, s6000 is the camera make (SONY) and model (6000), and 20220310 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 image####.jpg is the original raw photo name appended to the end of the new filename. Because the camera time was collected in EST the time in Namexif was shifted +4:00:00 to be in UTC.
Process_Date: 202204
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si R. Over
Contact_Organization: U.S. Geological Survey, Northeast Region
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 x2297
Contact_Electronic_Mail_Address: jover@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, using geoid 12B
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: 2022015FA_Truro_photolocations.csv contains 1,616 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: Time_EST
Attribute_Definition:
Time in HH:MM:SS of each corrected camera position in Eastern Standard Time (EST).
Attribute_Definition_Source: Processor defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 12:00:13
Range_Domain_Maximum: 12:53:55
Attribute_Units_of_Measure: HH:MM:SS EST
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: 42.04972995
Range_Domain_Maximum: 42.05276130
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: -70.07932595
Range_Domain_Maximum: -70.07457069
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Ellipsoid_NAD83_2011
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: 8.481
Range_Domain_Maximum: 30.668
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: 4655856.906
Range_Domain_Maximum: 4656197.204
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: 410684.699
Range_Domain_Maximum: 411076.312
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Altitude_NAVD88_m
Attribute_Definition:
Post-processed interpolated Z-coordinate of kite GNSS antenna position based on time of each image using NAVD88 with Geoid 12B.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 36.065
Range_Domain_Maximum: 58.252
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
The attributes Latitude, Longitude, and Altitude_NAVD88_m are included in the image headers as GPSLatitude, GPSLongitude, and GPSAltitude, 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. Positions are derived from an Emlid Reach PPK GNSS receiver.
Entity_and_Attribute_Detail_Citation: USGS Field Activity 2022-015-FA
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si R. Over
Contact_Organization: U.S. Geological Survey, Northeast Region
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 x2297
Contact_Electronic_Mail_Address: jover@usgs.gov
Resource_Description:
The Windows 10 zip folder 2022015FA_Truro_f1.zip contains 1,616 JPEG images and 2022015FA_Truro_f1_photolocations.csv contains the PPK GNSS navigation data for each image.
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: JPEG
Format_Version_Number: 1.0.0
Format_Specification: JPEG
Format_Information_Content: The 2022015FA_Truro_f1.zip file contains 1,616 JPEGs.
File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip
Transfer_Size: 1890
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link in the list above is to directly download all the data on the page (JPEG and CSV), the second to the data page to individually download files, 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 2022015FA_Truro_f1_photolocations.csv contains location data for the imagery.
Transfer_Size: 0.19
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link in the list above is to directly download all the data on the page (JPEG and CSV), the second to the data page to individually download files, and the third link is to the publication landing page.
Fees: none
Technical_Prerequisites:
Use of these files requires software capable of opening JPEG images and, if desired, capable of reading the associated EXIF information. Additionally, the location information is provided in a CSV file.
Metadata_Reference_Information:
Metadata_Date: 20220919
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jin-Si R. Over
Contact_Organization: U.S. Geological Survey, Northeast Region
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 x2297
Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the person is no longer with USGS.
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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