Lake Bluffs orthomosaic from low-altitude aerial imagery from unmanned aerial systems (UAS) flights over of the Lake Ontario shoreline in the vicinity of Sodus Bay, New York in July 2017 (GeoTIFF image)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2018
Title:
Lake Bluffs orthomosaic from low-altitude aerial imagery from unmanned aerial systems (UAS) flights over of the Lake Ontario shoreline in the vicinity of Sodus Bay, New York in July 2017 (GeoTIFF image)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9XQYCD0
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.5066/P9XQYCD0
Online_Linkage:
https://www.sciencebase.gov/catalog/item/5b1ee3a3e4b092d965254a66
Larger_Work_Citation:
Citation_Information:
Originator: Christopher R. Sherwood
Originator: Sandra M. Brosnahan
Originator: Seth D. Ackerman
Originator: Jonathan Borden
Originator: Ellyn T. Montgomery
Originator: Elizabeth A. Pendleton
Originator: Emily J. Sturdivant
Publication_Date: 2018
Title:
Aerial imagery and photogrammetric products from unmanned aerial systems (UAS) flights over the Lake Ontario shoreline at Sodus Bay, New York, July 12 to 14, 2017.
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9XQYCD0
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Sherwood, C.R., Brosnahan, S.M., Ackerman, S.D., Borden, Jonathan, Montgomery, E.T., Pendleton, E.A., and Sturdivant, E.J., 2018, Aerial imagery and photogrammetric products from unmanned aerial systems (UAS) flights over the Lake Ontario shoreline at Sodus Bay, New York, July 12 to 14, 2017: U.S. Geological Survey data release, https://doi.org/10.5066/P9XQYCD0.
Online_Linkage: https://doi.org/10.5066/P9XQYCD0
Online_Linkage:
https://www.sciencebase.gov/catalog/item/5b0800a7e4b0ac450c99d116
Description:
Abstract:
Low-altitude (80-100 meters above ground level) digital images were obtained from a camera mounted on a 3DR Solo quadcopter, a small unmanned aerial system (UAS), along the Lake Ontario shoreline in New York during July 2017. These data were collected to document and monitor effects of high lake levels, including shoreline erosion, inundation, and property damage in the vicinity of Sodus Bay, New York. This data release includes images tagged with locations determined from the UAS GPS; tables with updated estimates of camera positions and attitudes based on the photogrammetric reconstruction; tables listing locations of the base stations, ground control points, and transect points; geolocated, RGB-colored point clouds; orthomosaic images; and digital elevation models for each of the survey regions. Collection of these data was supported by the Federal Emergency Management Agency, the State of New York Departments of State and Environmental Conservation, and the USGS Coastal and Marine Geology Program and was conducted under USGS field activity number 2017-042-FA.
Purpose:
The orthomosaic image provides the optical surface reflectance of the land surface at mid-day low-tide on 12 July, 2017 in the Lake Bluffs study area. It was one of three products created to demonstrate the use of structure-from-motion for coastal research and to provide a means to test land cover classification from high-resolution imagery.
Supplemental_Information:
For more information about this field activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-042-FA. For the purposes of this work, a distinction is made between orthomosaic and orthophoto mosaic. Specifically, an orthomosaic corrects for camera lens distortion and preserves distances in the mosaic as a whole.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20170712
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.9518
East_Bounding_Coordinate: -76.937987
North_Bounding_Coordinate: 43.278047
South_Bounding_Coordinate: 43.269304
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5b1ee3a3e4b092d965254a66
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: State of New York Department of State
Theme_Keyword: State of New York Department of Environmental Conservation
Theme_Keyword: Federal Emergency Management Agency
Theme_Keyword: shoreline
Theme_Keyword: lake level
Theme_Keyword: 3DR Solo quadcopter
Theme_Keyword: Ricoh GRII
Theme_Keyword: low-altitude aerial imagery
Theme_Keyword: aerial imagery
Theme_Keyword: shoreline photographs
Theme_Keyword: photographs
Theme_Keyword: photos
Theme_Keyword: UAS
Theme_Keyword: Unmanned aerial system
Theme_Keyword: lakeshore
Theme_Keyword: Orthophoto
Theme_Keyword: Orthomosaic
Theme_Keyword: photo mosaic
Theme_Keyword: GeoTIFF
Theme_Keyword: raster
Theme_Keyword: field activity number 2017-042-FA
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: remote sensing
Theme_Keyword: aerial photography
Theme_Keyword: image mosaics
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: inlandWaters
Theme_Keyword: location
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: USA
Place_Keyword: Great Lakes
Place_Keyword: New York
Place_Keyword: Lake Ontario
Place_Keyword: Sodus, NY
Place_Keyword: Sodus Point
Place_Keyword: Sodus Bay
Place_Keyword: Crescent Bar
Place_Keyword: Lake Bluff
Place_Keyword: Charles Point
Place_Keyword: Sodus Point
Place_Keyword: Greig Street
Access_Constraints: none
Use_Constraints:
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Sandra Brosnahan
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2265
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: sbrosnahan@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
https://www.sciencebase.gov/catalog/file/get/5b1ee3a3e4b092d965254a66/?name=2017042FA_LakeBluffs_Orthomosaic_browse.jpg
Browse_Graphic_File_Description:
Browse image of a portion of an orthomosaic generated from photogrammetry and low-altitude aerial images obtained with unmanned aerial systems (UAS).
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Logical_Consistency_Report:
Photoscan software determines the photos used in the construction of the products (Point Cloud, DEM and Orthomosaic) based on the ability to align the photo and the usability of valid tie points within an image. A tie point represents a point that the software determine to be common from one photo to the next. Photographs (available in the larger work citation) are the source for the photogrammetric products and are grouped according to region and flight number. Flights 23-27 were acquired on July 12 and are used in the Lake Bluffs project. Flights 28-35 were acquired on July 13. However, flights 27-30 are included in the Charles Point project, and flights 31-35 are in the Sodus North Project. Flights 36-40 were acquired on July 14 and are used in the Greig Street Project.
Completeness_Report:
This orthomosaic was created from the filtered tie-points of the dense point cloud using the Agisoft Photoscan Professional (v. 1.3.2) photogrammetry software. Through a standardized filtering process, spurious points from the dense point cloud were eliminated and remaining point cloud was used to generate a digital elevation model, which was subsequently used to create this orthomosaic. The completed Photoscan project for Lake Bluffs, from which this orthomosaic was created, used 1154 of the original 1248 images and contained more than 126 million points. The unedited point cloud and the DEM are available in this data release at https://doi.org/10.5066/P9XQYCD0.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal positions of individual points for the DEM were calculated by photogrammetric software and ground control points. There are several sources of potential error that affect the horizontal accuracy:
1. The horizontal error estimate provided by Agisoft Photoscan for the Lake Bluffs project as a result of alignment, optimization, and ground control processing procedures is 1.2 cm. This value is an RMS estimate of positional error at discrete locations within the orthomosaic.
2. Ground control points were collected using a Spectra model SP80 GNSS receiver set to record XY locations with the national adjustment of 2011 (NAD83(2011) UTM zone 18N EPSG::6347), which differs from the Photoscan project coordinate system (NAD83/UTM zone 18N (EPSG::26918)). This difference may introduce an average additional 0.9 cm horizontally at the 95% confidence level according to the National Geodetic Survey (https://www.ngs.noaa.gov/web/surveys/NA2011/).
3. Additionally, an assessment of repeated survey sites including transect points and ground control points, using the same equipment by the USGS Aerial Imagery and Mapping (AIM) group estimates an accuracy of the ground control point locations of 1.76 cm (horizontal) and 0.54 cm (vertical).
The combination of the potential horizontal error is on the order of 3.86 cm for the Lake Bluffs products. Although some portions of the map may contain much larger errors, greater than 2 m horizontally, especially along the boundary of the project that are far from a ground control point, and across water bodies. The horizontal coordinate system for the Charles Point Point Cloud, DEM and Orthomosaic is NAD83/UTM zone 18N (EPSG::26918).

It is also important to note: The UAS image locations are derived from a mRo GPS (u-Blox Neo-M8N / 3DR SOLO Upgrade), located on the UAS, which receives signals from GPS and GLONASS satellites in WGS84 (G1150) EPSG::7660. This location information is used by the Photoscan software to help with the initial alignment, however after photo alignment, these location data have no bearing on the project or the derivative product. Therefore the positional accuracy and potential errors of the GPS data attached to the input photographs is not propagated to the Photoscan project and therefore does not contribute to the overall horizontal accuracy of the products (Point Cloud, DEM and Orthomosaic).
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: unpublished material
Title: Field geotagged aerial imagery (or whatever title you want)
Type_of_Source_Media: raster digital images
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170712
Ending_Date: 20170714
Source_Currentness_Reference: ground condition of when images were taken
Source_Citation_Abbreviation: geotagged images
Source_Contribution:
These are the images geotagged in the field and used to produce the subsequent photogrammetric products. The images available from the larger work citation of this data release have updated geotag information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2018
Title:
Ground control point and transect locations associated with images collected during unmanned aerial systems (UAS) flights over The Lake Ontario shoreline in the vicinity of Sodus Bay, New York in July 2017
Other_Citation_Details:
available from the Larger Work citation of this dataset (Suggested citation: Sherwood, C.R., Brosnahan, S.M., Ackerman, S.D., Borden, Jonathan, Montgomery, E.T., Pendleton, E.A., and Sturdivant, E.J., 2018, Aerial imagery and photogrammetric products from unmanned aerial systems (UAS) flights over the Lake Ontario shoreline at Sodus Bay, New York, July 12 to 14, 2017: U.S. Geological Survey data release, https://doi.org/10.5066/P9XQYCD0.)
Type_of_Source_Media: text data files
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170712
Ending_Date: 20170714
Source_Currentness_Reference: ground condition of when images were taken
Source_Citation_Abbreviation: GCPs
Source_Contribution:
The ground control points (GCPs; not transect points -- see metadata for more information) were used to geolocate the photogrammetric products
Process_Step:
Process_Description:
Images imported into Photoscan (Agisoft Photoscan Professional v. 1.3.2) for the Lake Ontario projects were geotagged using Mission Planner Software (version 1.3.49). Orthomosaics for the Lake Ontario projects were constructed using photogrammetry software (Agisoft Photoscan Professional v. 1.3.2) and digital images taken approximately 80 and 100 m above the ground on July 10 - 14, 2017, with a Ricoh GRII digital camera mounted in a 3DR Solo quadcopter operated the U.S. Geological Survey. This orthomosaic is the product from one of several photogrammetry projects from field activity 2017-042-FA. Four projects were used for flights in the vicinity of Sodus Bay on July 12, 13, and 14, 2017 (Lake Bluffs, Charles Point, Sodus North, and Greig Street). The projects combined images with ground control points to produce geolocated, colored (red-green-blue schema) point clouds. This orthomosaic, for the Lake Bluffs project, was created using a standard processing flow as described in the processing step below.
Process_Date: 201709
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
Contact_Person: Christopher R. Sherwood
Contact_Position: Research Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543
Country: U.S.A.
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Facsimile_Telephone: 508 457 2310
Contact_Electronic_Mail_Address: csherwood@usgs.gov
Process_Step:
Process_Description:
The following steps make up the processing flow for creating this orthomosaic from UAS flights:
1. Geotagged images (see source citation) containing useful imagery from the survey area were imported into Agisoft Photoscan Professional v. 1.3.2 software using the “Add photos…” tool. Photos taken before and immediately after takeoff, photos taken immediately prior to and after landing, and photos with 100% water were not loaded into the project. Project coordinate system is set to EPSG::7660 WGS84 (G1150) geocentric coordinate system.
2. Using ”Convert”, the coordinate system of the images (called “cameras” in Photoscan) was converted from native latitude/longitude WGS84 (G1150) coordinate system to meters in NAD83/UTM zone 18N (EPSG::26918).
3. The photos were processed through an initial alignment and optimization procedure using the following settings:
Alignment - Accuracy: “High”; Pair selection: “Reference”; Key point limit: 80,000; Tie point limit; 0 (unlimited). Adaptive camera model fitting option was selected.
Optimization - Lens-calibration parameters f, cx, cy, k1, k2, k3, p1, and p2 were included; b1, b2, and higher-order parameters k4, p3, and p4 were not.
4. The sparse point cloud (also known as tie points; created as a result of photo alignment and optimization) was edited using an iterative error-reduction procedure to filter the data. This was done in several iterations of a process called "Gradual Selection" to first to reduce reconstruction uncertainty (to a unitless value of 10) and then projection accuracy (to a weighted value of 3).
5. Ground control points were created by first by letting the software automatically detect markers where it finds all of the 4-ft square black/white targets deployed (false targets that are sometimes detected were manually deleted). The automatically-generated marker labels were manually changed to match the names in the survey notes and GCP location files.
6. "Import markers” was used to load the GCP location files, which assigned coordinates (northing, easting, and elevation in UTM Zone 18 North meters in NAD83 and NAVD88 coordinate systems) from the location file to the detected markers. The locations of auto-detected markers were retained.
7. Another round of "Gradual Selection" was done to reduce the reprojection error (to a value of 0.3 pixels, unless more than 10% of the points would be removed).
8. A dense point cloud was then created with the parameters "High" quality and “Aggressive” depth filtering.
9. A DEM was created with the parameters Source data="Dense Cloud" Interpolation="Enabled" Resolution="0.05"
10. An orthomosaic was create with the parameters Surface="DEM" Blending mode="Mosaic" Pixel size X="0.025" Pixel size Y="0.025"
11. The orthomosaic was exported in GeoTIFF format (2017-07-10_Charles_Crescent_ORTHO_2pt5cm.tif) along with a world file (tfw), then both were renamed to the AIM data release filenaming standard (e.g. 2017042FA_LakeBluffs_Orthomosaic.tif).
Process_Date: 20170913
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center
Contact_Person: Christopher R. Sherwood
Contact_Position: Research Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543
Country: U.S.A.
Contact_Voice_Telephone: 508-548-8700 x2269
Contact_Facsimile_Telephone: 508 457 2310
Contact_Electronic_Mail_Address: csherwood@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200810
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: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
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: 38400
Column_Count: 65880
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Universal Transverse Mercator
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.00000
Latitude_of_Projection_Origin: 0.000
False_Easting: 500000.0000
False_Northing: 0.0000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.025
Ordinate_Resolution: 0.025
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
There are no attributes associated with this GeoTIFF. This is a 4-band orthomosaic in GeoTIFF format. Band1=RedBand, Band2=GreenBand, Band3=BlueBand, Band4=Alphachannel (transparency)
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: mailing and physical address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
This data release contains an orthomosaic in GeoTIFF format (2017042FA_LakeBluffs_Orthomosaic.tif) and the world file (2017042FA_LakeBluffs_Orthomosaic.tfw), and browse graphic (2017042FA_LakeBluffs_Orthomosaic_Browse). FGDC CSDGM metadata (2017042FA_LakeBluffs_Orthomosaic.xml) accompanies the data on the dataset landing page.
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 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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Version_Number: Agisoft Photoscan Professional v. 1.3.2 GeoTIFF
Format_Specification: 32-bit RBGA GeoTIFF
Format_Information_Content:
Orthomosaic (each band is an 8-bit unsigned integer) in GeoTIFF image format at 0.025 meter resolution, world file and the associated metadata.
Transfer_Size: 2110
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/5b1ee3a3e4b092d965254a66
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/5b1ee3a3e4b092d965254a66
Network_Resource_Name: https://doi.org/10.5066/P9XQYCD0
Access_Instructions:
To download the data, it is recommended that you go to the page containing the data and take advantage of the large file handler. The first link is to the page containing the data. The second is a direct link to download all data available from the page as a zip file. And the final link is to the publication landing page.
Fees: none
Technical_Prerequisites:
To utilize these data an image processing or GIS software package capable of viewing a GeoTIFF image is necessary.
Metadata_Reference_Information:
Metadata_Date: 20240319
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Sandra Brosnahan
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2265
Contact_Facsimile_Telephone: 508-457-2310
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 20240319)
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9XQYCD0/2017042FA_LakeBluffs_Orthomosaic.html>
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