Digital surface model representing Head of the Meadow Beach, Truro during field activity 2021-014-FA on February 04, 2021

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 20220131
Title:

Digital surface model representing Head of the Meadow Beach, Truro during field activity 2021-014-FA on February 04, 2021

Edition: 1.0
Geospatial_Data_Presentation_Form: raster 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:

https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/

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:

A high-resolution elevation dataset of Head of the Meadow Beach for use by the public, researchers, and others to observe ground conditions and temporal change.

Supplemental_Information:

This digital elevation model, as constructed using structure from motion from the images in the 2021014FA_Truro_f1.zip folder in the greater work citation, represents Head of the Meadow Beach in view of CoastCam CACO-01 cameras. The product has sections of interpolation and has not been cloud optimized. 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; represents the state of the beach on February 4, 2021

Status:

Progress: Complete
Maintenance_and_Update_Frequency: Not planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.08100518
East_Bounding_Coordinate: -70.07389241
North_Bounding_Coordinate: 42.05351489
South_Bounding_Coordinate: 42.04920068

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:093bc36e-9637-4dd5-b2ac-4382677e8f1e

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: Structure from Motion

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: remote sensing
Theme_Keyword: digital elevation models
Theme_Keyword: datasets

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: elevation

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_Position: Geographer
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:

https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Topobathy/DSM/2021014FA_Truro_DSM_browse.JPG

Browse_Graphic_File_Description:

Elevation-colored image of topography data collected from Head of the Meadow Beach, Truro MA

Browse_Graphic_File_Type: JPEG

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: Andrew C. Ritchie
Originator: Christine Kranenburg
Originator: Jennifer (Jenna) A. Brown
Originator: Daniel D. Buscombe
Originator: Tom Noble
Originator: Christopher R. Sherwood
Originator: Jonathan Warrick
Originator: Phillipe Wernette
Publication_Date: 2021
Title:

Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6-Structure from motion workflow documentation

Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2021-1039

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details:

This publication includes the general methodology for processing imagery in Metashape to produce digital elevation models and ortho products.

Online_Linkage: https://doi.org/10.3133/ofr20211039

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The positional information used on the Helikite and ground control point datasets and metadata are available in the imagery and navigational components of the larger work citation.

Logical_Consistency_Report:

All data fall into expected ranges except for points near and offshore of the waterline, where the data returned can be noisy and may result in erroneous measurements. This is a digital surface model (DSM) and includes returns from vegetation.

Completeness_Report:

The structure from motion process that builds the DSM uses all the available imagery and location information at the start; however, not all images may align in the software to produce the final product. The topographic surface does have interpolated elevation data to fill holes. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigation information was acquired from a GNSS receiver (EMLID Reach M2) in PPK mode with a Multi-band GNSS antenna that has a theoretical horizontal accuracy of 2-5 cm. However, using these values in Metashape returned a poor product so the accuracy was loosened to 1 m to rely more on the ground control points, which have a theoretical accuracy of 1-2 cm. The final product was compared to the previous survey at Head of the Meadow (see first cross-reference) and the XY difference at a stable point was within 10 cm.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

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 2-5 cm. The ground control points used have centimeter vertical accuracies.

Lineage:

Process_Step:

Process_Description:

Digital Surface Model was created in Agisoft Metashape v. 1.7.2 using the following general steps (see Over and others, 2021 for a more detailed methodology explanation): 1. The project was created and imagery (located in larger work citation 2021014FA_Truro_f1.zip) and positions (located in larger work citation 2021014FA_Truro_f1_photolocations.csv) were imported using the NAD83(2011) datum. 2. Accuracies for the ground control points (GCPs) were set 0.05 m and accuracies for the camera positions were set to 1 m. The photos were aligned with high accuracy (the pixels are not subsampled for increased processing speed) using a keypoint limit of 50,000 and unlimited tie points. 3. Ten GCPs (2021014FA_Truro_nav_AeroPoints.csv located in the larger work citation) were added to the project in NAD83(2011) and manually placed on the images as markers. 4. The alignment process matches pixels between images to create point clouds and puts the imagery into a relative spatial context using the photo positions and GCPs. Then, Metashape software refined and optimized, using least squares, the camera positions and lens model using gradual selection and optimization parameters of: Ru = 15, Pa = 5, and Re = 0.5 to minimize the reprojection error or the distance between the measured points and the software created points. 5. A dense point cloud was generated using the high quality setting (images were not subsampled) and a low frequency filtering algorithm. The total camera position error was 5 m (XYZ: 2.16, 4.25, 0.99) and the total GCP error was 0.019 m (XYZ: 0.010, 0.010, 0.012). The dense point cloud was then edited to remove noise by filtering by point confidence before generating an interpolated digital elevation model (the software calls all models elevation models, but technically it is a surface model because it includes vegetation/canopy returns, a terrain model would be only bare earth returns). 6. The DSM product was exported at 25 cm in NAD83(2011) UTM Zone 19N and NAVD88 (m). No further cropping was applied.

Process_Date: 20210624
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: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1258

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 the 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:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Pixel
Row_Count: 1888
Column_Count: 2332

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 19
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -69.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 0.25
Ordinate_Resolution: 0.25

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name:

North American Datum of 1983 (National Spatial Reference System 2011)

Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.000000
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_DSM_25cm.tif
Entity_Type_Definition:

A raster dataset (GeoTIFF format) with encoded elevation values of Head of the Meadow Beach in Truro, MA on February 4, 2021. Pixel resolution is 25 cm.

Entity_Type_Definition_Source:

U.S. Geological Survey, Coastal and Marine Hazards and Resources Program

Attribute:

Attribute_Label: Value
Attribute_Definition:

Surface elevation orthometric height NAVD88 (m) using Geoid 2018 in NAD83(2011) UTM Zone 19N, (no data value = -999)

Attribute_Definition_Source:

U.S. Geological Survey, Woods Hole Coastal and Marine Science Center

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -999
Enumerated_Domain_Value_Definition: No data
Enumerated_Domain_Value_Definition_Source: Producer-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.866
Range_Domain_Maximum: 28.111
Attribute_Units_of_Measure: meters

Overview_Description:

Entity_and_Attribute_Overview:

Pixels represent elevation in meters relative to North American Vertical Datum of 1988 (NAVD88). GeoTIFF was created from the dense point cloud in Agisoft Metashape with interpolation enabled. The Metashape software assigns a no-data value of -999 to the elevation surface.

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: 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:

GeoTIFF file 2021014FA_Truro_DSM_25cm.tif as a 32-bit floating point digital surface model (DSM).

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: GeoTIFF
Format_Version_Number: 1.0.0
Format_Specification: 32-bit floating point GeoTIFF format
Format_Information_Content:

GeoTIFF file containing 32-bit floating point DSM of Head of the Meadow Beach, Truro MA on February 4, 2021.

Transfer_Size: 9.11

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/data/Topobathy/DSM/2021014FA_Truro_DSM_25cm.tif

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2021-014-FA/

Network_Resource_Name: https://doi.org/10.5066/P9D94NZ3

Access_Instructions:

The first link in the list above is to directly download the GeoTIFF, the second to the field data page, and the third link is to the publication landing page.

Fees: None.

Metadata_Reference_Information:

Metadata_Date: 20240318
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: 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. (updated on 20240318)

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/field_activities/2021_014_fa/2021-014-FA_Truro_DSM_meta.html>