U.S. Geological Survey
20210824
Town Neck Beach, Massachusetts, 10 cm 2016-2017 Digital Elevation Models
1.0
raster digital data
data release
DOI:10.5066/P9BFD3YH
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/P9BFD3YH
https://www.sciencebase.gov/catalog/item/60e74e6ad34e2a7685d0c6c8
C. Sherwood
J. Over
K. Soenen
2021
Structure from motion products associated with UAS flights in Sandwich, Massachusetts between January 2016 - September 2017
1.0
digital files
data release
DOI:10.5066/P9BFD3YH
Reston, VA
U.S. Geological Survey
Suggested citation: Sherwood, C.R., Over, J.R., and Soenen, K., 2021, Structure from motion products associated with UAS flights in Sandwich, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9BFD3YH.
https://doi.org/10.5066/P9BFD3YH
https://www.sciencebase.gov/catalog/item/60e74d4bd34e2a7685d0c428
Low-altitude (80-100 meters above ground level) Unmanned Aircraft Systems (UAS) imagery of Town Neck Beach in Sandwich, Massachusetts, were used in a structure-from-motion (SfM) photogrammetry workflow to create high-resolution topographic datasets. Imagery was collected at close to low tide on twelve days to observe changes in beach and dune morphology. Ground control points (GCPs), which are temporary targets on the ground located by using a real-time kinematic global navigation satellite system (RTK-GNSS) base station and rover, were used to constrain the SfM process. Photoscan (v. 1.2-1.4) was used to create a digital elevation model and orthomosaic for each data collection day. Collection of these data was supported by the U.S. Geological Survey Coastal/Marine Hazards and Resources Program and were conducted under USGS field activity numbers 2016-013-FA, 2016-043-FA, 2016-053-FA, 2016-054-FA, 2016-055-FA, 2017-005-FA, 2017-008-FA, 2017-010-FA, 2017-014-FA, 2017-027-FA, 2017-029-FA, and 2017-050-FA.
May be used as a high-resolution elevation dataset of Town Neck Beach for use by the public, researchers, and others to observe ground conditions and change over time.
For more information see the imagery and GCP releases; https://www.sciencebase.gov/catalog/item/5a7daca0e4b00f54eb24a4f5 and https://www.sciencebase.gov/catalog/item/5cf12e89e4b056af3664e718. UAS mapping was conducted at Town Neck Beach and adjacent Spring Hill Beach (January 9, 2017 only) in Sandwich, Massachusetts. The products of the imagery releases include the data collected in 2016 and 2017. The bounding coordinates below represent the maximum extents of all the surveys, no single survey covers the entire extent. The DEM includes returns from the vegetation canopy and is thus also a Digital Surface Model (DSM), a type of DEM. Geospatial software is recommended for viewing.
20160122
20160125
20160211
20160330
20160921
20170109
20170125
20170214
20170316
20170428
20170504
20170918
ground condition: data represent twelve days of collection between January 2016 and September 2017
Not planned
-70.49754246
-70.47197217
41.77618650
41.76013342
ISO 19115 Topic Category
geoscientificInformation
oceans
imageryBaseMapsEarthCover
None
U.S. Geological Survey
USGS
Coastal/Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
FC300X
DJI Phantom 3 quadcopter
USGS Thesaurus
remote sensing
aerial photography
image collections
coastal processes
geomorphology
structure from motion
USGS Metadata Identifier
USGS:60e74e6ad34e2a7685d0c6c8
Common geographic areas
United States
Cape Cod
Sandwich
Massachusetts
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 (USGS) as the source of this information. 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.
Christopher R Sherwood
U.S. Geological Survey, Northeast Region
Research Oceanographer
mailing address
384 Woods Hole Road
Woods Hole
MA
02543
US
508-457-2269
508-457-2310
csherwood@usgs.gov
Sandwich_DEM_Browse.JPG https://www.sciencebase.gov/catalog/file/get/60e74e6ad34e2a7685d0c6c8?name=Sandwich_DEM_Browse.JPG
Example section of an elevation-colored digital elevation (surface) model
JPEG
Products were processed in Photoscan (v. 1.2-1.4).
Jin-Si R. Over
Andrew C. Ritchie
Christine J. Kranenburg
Jenna A. Brown
Daniel D. Buscombe
Tom Noble
Christopher R. Sherwood
Jonathan A. Warrick
Phillipe A. Wernette
2021
Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6—Structure from motion workflow documentation
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
US Geological Survey
This is a user guide that details the Agisoft Metashape workflow that take imagery and creates 3D products; Photoscan is the precursor program to Metashape but the steps are very similar.
https://doi.org/10.3133/ofr20211039
The source imagery and positional information and metadata that were used to create these photogrammetrically derived digital elevation models are available here: https://doi.org/10.5066/P9CJOMBM and https://doi.org/10.5066/F7QC02RM. Information on the horizontal and vertical accuracies of the source data can be found within the data release metadata. Ground Control Points were used to constrain the products.
All aerial photographs were acquired by with the integrated DJI FC300X camera mounted on a DJI Phantom 3 quadcopter unmanned aerial system (UAS). Images were collected along pre-planned lines with 50 to 60% cross-track overlap and 65-70% along-track overlap. After images were aligned the dense cloud was edited (see processing steps) to remove erroneous points from the surface before constructing the elevation model. All data fall into expected ranges except for points near tall buildings, areas of poorer image overlap, and just offshore of the waterline, where the data return is often sparse, noisy, and erroneous. The DEM includes returns from the vegetation canopy.
Repeat UAS surveys were done to map Town Neck Beach and adjacent Spring Hill Beach in Sandwich, MA twelve times between January 2016-September 2017. The final DEM products are interpolated and have been cropped to remove noise and zones of high uncertainty in the foreshore, offshore, inlet, and near clustered buildings, therefore the DEMs do not cover the same exact extent as the associated orthorectified products available in this larger work citation.
The horizontal positional accuracy for each DEM was evaluated against independent photo-identifiable ground control points (GCPs) measured with survey-grade GPS, each survey has between 19-41 GCPs associated with the survey, which have horizontal accuracies around 1.5 cm. The total horizontal Root Mean Square Error (RMSE) of the DEMs is on average 10 cm.
The vertical positional accuracy for each DEM was evaluated against independent photo-identifiable ground control points (GCPs) measured with survey-grade GPS, each survey has between 19-41 GCPs associated with the survey, which have horizontal accuracies around 0.5 cm. The total vertical Root Mean Square Error (RMSE) of the DEMs is on average 10 cm.
Ellyn T Montgomery
Christopher R Sherwood
Peter Traykovski
Barry Irwin
Jonathan Borden
Marinna M Martini
Simon Minor
2019
Geotagged Low-Altitude Aerial Imagery From Unmanned Aerial System Flights Over Town Neck Beach, in Sandwich, Massachusetts, With Associated Ground Control Points, and Transects Collected by the U.S. Geological Survey on January 22, January 25, February 11, March 30, and September 21, 2016
remote-sensing image and tabular digital data
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey
https://doi.org/10.5066/p9cjombm
disc
20160122
20160125
20160211
20160330
20160921
ground condition
Imagery and Ground Control Points from 2016 Flights
Source JPEG imagery and control points for 2016 flights
Christopher R Sherwood
Peter A. Traykovski
Ellyn T Montgomery
Jonathan Borden
Sandra M. Brosnahan
Barry J. Irwin
Eric D Marsjanik
Marinna A Martini
Steven E Suttles
2019
Geotagged Low-Altitude Aerial Imagery from Unmanned Aerial Systems Flights over Town Neck Beach in Sandwich, Massachusetts, With Associated Ground Control Points, and Transects, Collected on January 9, January 25, February 14, March 16, April 28, May 4, and September 18, 2017
dataset
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey
https://doi.org/10.5066/f7qc02rm
Digital and/or Hardcopy
20170109
20170125
20170214
20170316
20170428
20170504
20170918
ground condition
Imagery and Ground Control Points from 2017 Flights
Source JPEG imagery and control points for 2017 flights
The images and ground control points published in the 2016 and 2017 data releases were processed in Photoscan (v. 1.2-1.4) following the general workflow of Over and others (2021).
The general steps and deviations for each individual date are provided here. All flights were processed in UTM Zone 19N relative to NAD83(2011) and NAVD88 (m).
1. Separate camera models and camera groups were created for each flight. Image sets were edited to remove images that were blurry, tilted to include the horizon, showed only water, or were taken before takeoff or after landing.
2. Imagery (with positions) were aligned to create a point cloud using a 'High' alignment setting, keypoint limit of 80,000, tiepoint limit of 0.
3. The resultant point cloud was filtered using one iteration of the 'Reconstruction uncertainty' filter at a level of 10, one iteration of the 'Projection accuracy' filter at a level of 3, and two iterations of the 'Reprojection accuracy' filer at a level of 0.3. With each filter iteration points were selected, deleted, and then the camera model optimized to refine the focal length, cx, cy, k1, k2, k3, p1, and p2 camera model coefficients.
4. Detect Markers Tool was used to auto locate GCP targets, and the locations of targets not found through this procedure (including non-standard in-place targets) were manually located.
5. A high quality dense point cloud was generated for the chunk with 'aggressive' filtering.
6. A DEM was built from the dense point cloud with interpolation (inverse distance weighting) enabled.
7. DEM was exported in NAD83(2011) UTM Zone 19N and NAVD88(meters) with a 10 centimeter cell size.
8. DEM was clipped manually in Global Mapper (v. 20) to a polygon that removed high uncertainty regions near wetted areas near the lower shoreface and tidal inlets with help from the corresponding orthorectified product.
Imagery and Ground Control Points from 2016 Flights
Imagery and Ground Control Points from 2017 Flights
201711
Christopher R Sherwood
U.S. Geological Survey, Northeast Region
Research Oceanographer
mailing address
384 Woods Hole Road
Woods Hole
MA
02543
US
508-457-2269
508-457-2310
csherwood@usgs.gov
Final clipped DEMs were turned into Cloud Optimized GeoTIFFs (COG) using gdal_translate with the following command:for %i in (.\*.tif) do gdal_translate %i .\cog\%~ni_cog.tif -co COMPRESS=LZW -co COPY_SRC_OVERVIEWS=YES -co BIGTIFF=YES -co TILED=YES (v. 3.1.4 accessed October 20, 2020 https://gdal.org/). Where i was the name of each geoTIFF section.
20210707
Jin-Si R Over
U.S. Geological Survey, Northeast Region
Geographer
mailing address
384 Woods Hole Road
Woods Hole
MA
02543
US
508-457-2269
508-457-2310
jover@usgs.gov
Raster
Pixel
Universal Transverse Mercator
19
0.999600
-69.000000
0.000000
500000.000000
0.000000
row and column
1
1
meters
NAD83_National_Spatial_Reference_System_2011
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
20160122_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on January 22, 2016. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-21.626
14.395
meters
20160125_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on January 25, 2016. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-7.496
15.102
meters
20160211_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on February 11, 2016. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-4.971
14.702
meters
20160330_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on March 30, 2016. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-3.472
15.025
meters
20160921_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on September 21, 2016. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
-32767
No data
Producer-defined
-4.324
15.116
meters
20170109_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on January 9, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
-32767
No data
Producer-defined
-19.962
14.805
meters
20170125_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on January 25, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
-32767
No data
Producer-defined
-12.312
15.341
meters
20170214_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on February 14, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
-32767
No data
Producer-defined
-6.57
14.974
meters
20170316_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on March 16, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-4.729
14.212
meters
20170428_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on April 28, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-3.965
18.796
meters
20170504_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on April 4, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-14.725
14.945
meters
20170918_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif
A raster dataset (Cloud-Optimized GeoTIFF format) with encoded elevation values of Town Neck Beach in Massachusetts on September 18, 2017. Pixel resolution is 10-cm.
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Value
Surface elevation orthometric height (m) in UTM Zone 19N, NAVD88 using Geoid 2012B (no data value = -32767)
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
-32767
No data
Producer-defined
-5.921
15.003
meters
Pixels represent elevation in meters relative to NAVD88, the no-data value is -32767. There are 12 DEM 32-bit floating point cloud optimized GeoTIFFs. The filename for each DEM is formatted as "date_location_DEM_10cm_UTM19N_NAVD88_cog.tif", where date is the date the images were collected (in YYYYMMDD format), location is SandwichTNB where TNB is Town Neck Beach in Massachusetts, DSM is Digital Surface Model, 10cm indicates the resolution of the grid, UTM19N_NAVD88 denotes the horizontal and vertical reference systems, and cog is Cloud Optimized GeoTIFF.
USGS
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
This data release includes twelve 10 cm resolution LZW compressed Cloud Optimized GeoTIFFs of Sandwich Town Neck Beach from January 2016 to September 2017. In order from oldest to most recent the files are 20160122_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (196MB), 20160125_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (115MB), 20160211_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (136MB), 20160330_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (125MB), 20160921_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (265MB), 20170109_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (127MB), 20170125_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (116MB), 20170214_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (114MB), 20170316_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (144MB), 20170428_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (204MB), 20170504_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (200MB), 20170918_SandwichTNB_DSM_10cm_UTM19N_NAVD88_cog.tif (135MB).
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
GeoTIFF
Cloud optimized 32-bit floating point 10-cm GeoTIFFs stored with LZW compression.
none
5452.976
https://www.sciencebase.gov/catalog/file/get/60e74e6ad34e2a7685d0c6c8
https://www.sciencebase.gov/catalog/item/60e74d4bd34e2a7685d0c428
https://www.sciencebase.gov/catalog/item/60e74e6ad34e2a7685d0c6c8
https://doi.org/10.5066/P9BFD3YH
The first link is to download all the DEM data into one zip file, the second is the landing page for the data release, the third to the page with all the Sandwich DEMs where they can be downloaded individually.
none
20210824
Jin-Si R Over
U.S. Geological Survey, Northeast Region
Geographer
mailing address
384 Woods Hole Road
Woods Hole
MA
02543
US
508-457-2269
508-457-2310
jover@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None