Emily J. Sturdivant
Erika E. Lentz
E. Robert Thieler
David P. Remsen
Simon Miner
2017
Elevations surveyed at Black Beach, Falmouth, Massachusetts on 18 March 2016 (text file)
1.0
digital text files
data release
DOI:10.5066/F7KW5F04
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
The first link is to the publication landing page. The second link is to the page containing the data.
https://doi.org/10.5066/F7KW5F04
https://www.sciencebase.gov/catalog/item/59b00e02e4b020cdf7d4db36
Emily J. Sturdivant
E. Robert Thieler
Erika E. Lentz
David P. Remsen
Simon Miner
2017
Topographic, imagery, and raw data associated with unmanned aerial systems (UAS) flights over Black Beach, Falmouth, Massachusetts on 18 March 2016
1.0
data release
DOI:10.5066/F7KW5F04
Reston, VA
U.S. Geological Survey
Suggested citation: Sturdivant, E.J., Thieler, E.R., Lentz, E.E., Remsen, D.P., and Miner, Simon, 2017, Topographic, imagery, and raw data associated with unmanned aerial systems (UAS) flights over Black Beach, Falmouth, Massachusetts on 18 March 2016: U.S. Geological Survey data release, https://doi.org/10.5066/F7KW5F04.
https://doi.org/10.5066/F7KW5F04
https://www.sciencebase.gov/catalog/item/59a05400e4b038630d030442
Imagery acquired with unmanned aerial systems (UAS) and coupled with structure from motion (SfM) photogrammetry can produce high-resolution topographic and visual reflectance datasets that rival or exceed lidar and orthoimagery. These new techniques are particularly useful for data collection of coastal systems, which requires high temporal and spatial resolution datasets. The U.S. Geological Survey worked in collaboration with members of the Marine Biological Laboratory and Woods Hole Analytics at Black Beach, in Falmouth, Massachusetts to explore scientific research demands on UAS technology for topographic and habitat mapping applications. This project explored the application of consumer-grade UAS platforms as a cost-effective alternative to lidar and aerial/satellite imagery to support coastal studies requiring high-resolution elevation or remote sensing data. A small UAS was used to capture low-altitude photographs and GPS devices were used to survey reference points. These data were processed in an SfM workflow to create an elevation point cloud, an orthomosaic image, and a digital elevation model.
These points provide surface elevations at approximately 5 meter spacing roughly along two north-south transects and six east-west transects. Transects were loosely-established as they were only intended to collect a representative sample of reference points from around the study area. They were used to measure the accuracy of photogrammetric products derived from an aerial image survey at Black Beach, Falmouth on 18 March, 2016.
For more information regarding field activity 2016-010-FA, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-010-FA.
20160318
ground condition
None planned
-70.64397
-70.64174
41.58702
41.58321
USGS Metadata Identifier
USGS:59b00e02e4b020cdf7d4db36
None
U.S. Geological Survey
USGS
Woods Hole Coastal and Marine Science Center
WHCMSC
Coastal and Marine Geology Program
CMGP
ground control point
coasts
point data
elevation
cross shore transect
ISO 19115 Topic Category
elevation
USGS Thesaurus
aerial photography
geospatial datasets
None
Atlantic Ocean
Cape Cod
Barnstable
Massachusetts
Falmouth
Black Beach
Great Sippewissett Marsh
Great Sippewissett Inlet
Buzzards Bay
none
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
U.S. Geological Survey
Emily J. Sturdivant
Geographer
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543-1598
508-548-8700 x2230
508-457-2310
esturdivant@usgs.gov
https://www.sciencebase.gov/catalog/file/get/59b00e02e4b020cdf7d4db36/?name=bb20160318_transects_browse.png
Map of point locations with transects labeled.
PNG
Coordinates recorded for each entry describe discrete positions in space. The Note column indicates the transect along which the point was collected or a description of the point surveyed (e.g. ‘BOARD’). All points used as reference points to assess the accuracy of SfM processing (see larger work) are listed in the text file.
All coordinates surveyed along the eight transects are recorded in the text file. The Note column indicates the transect identifier. The following columns were removed because they contained values that were either unnecessary or misleading: Point_ID, Cartesian_X, Cartexian_Y, Cartesian_Z, Ant_hgt_KI, Ant_Hgt_True, Solution, noSV, PDOP, HDOP, VDOP, PC DATE STAMP, PC TIME STAMP, and GPS END TIME.
A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. Horizontal RMS error is calculated for each point in the column “Dev_1” of the data file. The average HRMS error estimated by the receivers is approximately 0.011 m. The largest horizontal difference measured was 0.017 m. Positions were only recorded when the solution was fixed. Number of visible satellites was always greater than 13 and the geometry of triangulation points was consistently of high quality, indicated by dilution of precision (DOP) values close to 1. Position DOP ranged from 0.9 to 1.1 and horizontal DOP from 0.5 to 0.7.
A formal accuracy assessment of the positional information in the data set has not been conducted. Vertical RMS is recorded for each entry in the column “Dev_2” of the data file. The average VRMS estimated by the receivers is approximately 0.014 m. Number of visible satellites was always greater than 14 and the geometry of triangulation points was consistently of high quality, indicated by dilution of precision (DOP) values close to 1. Position DOP ranged from 0.9 to 1.1 and vertical DOP from 0.8 to 0.9.
Field crews used three differential GNSS (Global Navigation Satellite System) rover instruments survey 254 reference elevation points roughly along two north-south transects and six east-west transects at approximately 5-meter intervals between points. Transects were loosely-established as they were only intended to collect a representative sample of reference points from around the study area. The rovers received differential GPS corrections in real time from a base station on the Massachusetts Continuously Operating Reference Station Network (MaCORS) for RTK position corrections that yield (x,y,z) data accurate to within 1-3 cm (network: NTRIP RTCM3_MAX). The RTK base station was located in East Falmouth, approximately 9 km from Black Beach. Positions were referenced to WGS 84, UTM Zone 19 North (meters horizontal) and Geoid 12a, NAVD88 (meters vertical) by the MaCORS base station.
Two rovers were Spectra Precision model SP80 GNSS receivers with antenna SPP91564_2 (radius: 0.0985 m; slant height measure point: 0.028 m; L1 offset: 0.0826 m; L2 offset: 0.0756 m; instrument height: 2.0826 m) and the other, model ProMark GNSS Receiver 800 was operated with antenna ASH802147 (radius: 0.098 m; slant height measure point: 0.04 m; L1 offset: 0.0852 m; L2 offset: 0.0922 m; instrument height: 2.0852 m). Rover antennas were mounted on 2-m survey rods with bubble levels and 5-cm (2-inch) sand feet. The receivers were connected to Carlson CHC LT30 Handheld Terminal running Carlson SurvCE software under Windows Mobile v. 6.1 Professional operating system.
Rovers were operated by Sandy Brosnahan, Barry Irwin, Jonathan Borden, and E. Robert Thieler. The SP80 rover operated by Brosnahan was connected by receiver WiFi to a data collector running SurvCE Version 4.06. Brosnahan surveyed two south–north transects from the tidal flats to the marsh. Irwin operated the ProMark 800, connected by internal GSM to the data collector running SurvCE Version 4.90.44, to survey 6 west–east transects. In some cases operators reversed direction or surveyed locations off the trajectory of the transect.
The measurements were exported from the data collector in a text file in the RW5 format and then converted to a comma-separated values file using the Carlson Report Generator for a SurvCE RW5 Report (https://www.carlsonemea.com/cwa/report). The three datasets were consolidated into one and then manually separated into GCP locations and transect points by referring to the operator-entered label stored in the Note column. The Note column indicates the transect label or a description of the point surveyed (e.g. ‘BOARD’). All points used as reference points to assess the accuracy of SfM processing (see bb_20160318_pointcloud.laz metadata in the larger work) are listed in the text file. The following columns were removed because they contained values that were unnecessary or misleading: Point_ID, Cartesian_X, Cartesian_Y, Cartesian_Z, Ant_Hgt_KI, Ant_Hgt_True, Solution, PC DATE STAMP, PC TIME STAMP, and GPS END TIME. The Note column was moved to the first column position.
20160318
U.S. Geological Survey
Emily J. Sturdivant
Geographer
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543-1598
508-548-8700 x22630
508-457-2310
esturdivant@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200807
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Universal Transverse Mercator
0.999600
-69.00000
0.000
500000.0000
0.0000
coordinate pair
0.001
0.001
meters
World Geodetic System 1984 (WGS 84)
WGS 84
6378137
298.257224
North American Vertical Datum of 1988 (NAVD88)
0.01
meters
Explicit elevation coordinate included with horizontal coordinates
bb20160318_transects.csv
This file contains positions in the horizontal and vertical plane surveyed at Black Beach to provide independent reference points for accuracy assessment.
U.S. Geological Survey
Note
Point description, usually transect identifier.
GPS operator
character set
Latitude
Latitude in degrees minutes seconds referenced to WGS 84.
SP80 GNSS receiver
41 34 59.539920
41 35 13.272354
degrees minutes seconds
1.0E-6
Longitude
Longitude in degrees minutes seconds referenced to WGS 84.
SP80 GNSS receiver
-70 38 38.28000
-70 38 30.25176
degrees minutes seconds
1.0E-5
Elevation
Ellipsoid elevation in meters referenced to WGS84 mean sea level.
SP80 GNSS receiver
-26.8268
-22.8484
meters
1.0E-4
Local_N
Northing in meters referenced to UTM Zone 19 North referenced to WGS 84.
SP80 GNSS receiver
4604805.15
4605229.488
meters
1.0E-4
Local_E
Easting in meters referenced to UTM Zone 19 North referenced to WGS 84.
SP80 GNSS receiver
362971.4225
363155.517
meters
1.0E-4
Local_Z
Elevation referenced to NAVD88.
SP80 GNSS receiver
-0.2037
3.775
meters
1.0E-3
Dev_1
Horizontal RMS error reported by the GNSS receiver.
SP80 GNSS receiver
0.006
0.013
meters
1.0E-4
Dev_2
Vertical RMS error reported by the GNSS receiver.
SP80 GNSS receiver
0.009
0.02
meters
1.0E-4
noSV
number of visible satellites
SP80 GNSS receiver
13
17
PDOP
Positional dilution of precision (DOP)
SP80 GNSS receiver
0.9
1.7
meters
1.0E-1
HDOP
Horizontal dilution of precision (DOP)
SP80 GNSS receiver
0.6
0.9
meters
1.0E-1
VDOP
Vertical dilution of precision (DOP)
SP80 GNSS receiver
0.7
1.5
meters
1.0E-1
GPS_TIME
Date and time in Coordinated Universal Time (UTC) at which the data were recorded in the field in 18 Mar 2016 HH:MM:SS format.
SP80 GNSS receiver
18 Mar 2016 14:18:32
18 Mar 2016 15:36:07
The text file contains one header line and 254 additional lines with 14 columns of comma-separated values. The first header line contains column headings.
U.S. Geological Survey
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
The data include a comma-separated values file and one PNG image of a map of the surveyed area in which markers indicate locations of the points. Additionally, the CSDGM FGDC metadata in XML format is included.
Neither the U.S. Government, the Department of the Interior, the USGS, the Marine Biological Laboratory, Woods Hole Analytics, 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 USGS 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.
CSV
The CSV of coordinates collected along eight south-north and west-east transects. FGDC CSDGM metadata is also included.
0.021
https://www.sciencebase.gov/catalog/item/59b00e02e4b020cdf7d4db36
https://www.sciencebase.gov/catalog/file/get/59b00e02e4b020cdf7d4db36
https://doi.org/10.5066/F7KW5F04
The first link is to the page containing the data. The second is a direct link to download a zipped file with the data. And the final link is to the publication landing page.
none
The file is plain text with comma-separated-values. It can be read with most editors and spreadsheet programs. The browse graphic is a digital image and can be displayed with most image viewing software.
20211119
U.S. Geological Survey
Emily J. Sturdivant
Geographer
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543-1598
508-548-8700 x2230
508-457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998