Time Series of Structure-from-Motion Products - Multispectral Orthomosaics: Little Dauphin Island and Pelican Island, Alabama, September 2018 to April 2019

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Christine J. Kranenburg
Originator: Jenna A. Brown
Originator: Stephen T. Bosse
Originator: P. Soupy Dalyander
Publication_Date: 20210610
Title:
Time Series of Structure-from-Motion Products - Multispectral Orthomosaics: Little Dauphin Island and Pelican Island, Alabama, September 2018 to April 2019
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Release
Issue_Identification: doi:10.5066/P9I6BP66
Publication_Information:
Publication_Place: St. Petersburg, Florida
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/P9I6BP66
Description:
Abstract:
Aerial imagery acquired with a small unmanned aircraft system (sUAS), in conjunction with surveyed ground control points (GCP) visible in the imagery, can be processed with structure-from-motion (SfM) photogrammetry techniques to produce high-resolution orthomosaics, three-dimensional (3D) point clouds and digital elevation models (DEMs). This dataset, prepared by the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC), provides UAS survey data products consisting of multispectral (MS) orthomosaics produced from imagery collected at Little Dauphin Island and Pelican Island, Alabama, from September 2018 to April 2019 in order to develop integrated models linking geomorphology, habitat characteristics, and non-breeding shorebird species usage.
Photogrammetry software was used to perform SfM processing on low-altitude digital aerial imagery acquired with a 3DR Solo UAS quadcopter equipped with a Ricoh GR II digital camera and MicaSense RedEdge 3 multispectral camera, using surveyed temporary targets (black and white, 4-square checked pattern) distributed uniformly throughout the UAS flight operations area as GCPs. The following SfM products are produced for each UAS survey over the northern half of Little Dauphin Island and all of Pelican Island: * georeferenced red-green-blue (RGB) orthomosaic image with 5-centimeter (cm) resolution * georeferenced MS orthomosaic image with 5-cm resolution * DEM with 5-cm horizontal resolution * 3D RGB-colored point cloud
All horizontal data are provided in the Universal Transverse Mercator (UTM) projected coordinate system, Zone 16 North (16N), referenced to the North American Datum of 1983 (NAD83(2011)), and elevation is referenced to the North American Vertical Datum of 1988 (NAVD88), GEOID12B.
Purpose:
These SfM products were produced from aerial images collected at Little Dauphin and Pelican Islands, Alabama, from September 2018 to April 2019, in order to develop integrated models linking geomorphology, habitat characteristics, and non-breeding shorebird species usage.
Supplemental_Information:
These data were collected by the USGS Coastal and Marine Hazards and Resources Program under the following USGS field activity numbers (FANs), and the associated field activity web pages contain additional information regarding the field activity: 09/2018 FAN: 2018-352-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-352-FA ; 11/2018 FAN: 2018-362-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-362-FA ; 12/2018 FAN: 2018-370-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-370-FA ; 02/2019 FAN: 2019-306-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-306-FA ; 03/2019 FAN: 2019-311-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-311-FA ; 04/2019 FAN: 2019-317-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-317-FA .
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20180912
Single_Date/Time:
Calendar_Date: 20180913
Single_Date/Time:
Calendar_Date: 20181115
Single_Date/Time:
Calendar_Date: 20181116
Single_Date/Time:
Calendar_Date: 20181217
Single_Date/Time:
Calendar_Date: 20181218
Single_Date/Time:
Calendar_Date: 20181219
Single_Date/Time:
Calendar_Date: 20190214
Single_Date/Time:
Calendar_Date: 20190215
Single_Date/Time:
Calendar_Date: 20190312
Single_Date/Time:
Calendar_Date: 20190415
Single_Date/Time:
Calendar_Date: 20190416
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -88.12889537
East_Bounding_Coordinate: -88.10731142
North_Bounding_Coordinate: 30.28187897
South_Bounding_Coordinate: 30.23092080
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:f6189c29-32a1-4378-a719-2fd44ad40025
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: structure from motion
Theme_Keyword: remote sensing
Theme_Keyword: aerial photography
Theme_Keyword: geospatial datasets
Theme_Keyword: coastal processes
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: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC
Theme_Keyword: unmanned aircraft systems
Theme_Keyword: UAS
Theme_Keyword: orthomosaics
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: Geographic Names Information Service (GNIS)
Place_Keyword: Alabama
Place_Keyword: Mobile County
Place_Keyword: Dauphin Island
Place_Keyword: Pelican Island
Access_Constraints: None
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Christine J. Kranenburg
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ckranenburg@usgs.gov
Data_Set_Credit:
Data collection was funded by the U.S. Geological Survey. We would like to thank the following people for their contribution to the data collection efforts: Nicholas Enwright, Brett Patton, Chelsea Stalk, Nancy DeWitt and Sara Zeigler of the USGS and Spencer Stelly of Stelley Consulting.
Cross_Reference:
Citation_Information:
Originator: Kranenburg, C.J.
Originator: Brown, J.A.
Originator: Sturdivant, E.J.
Originator: Stalk, C.A.
Originator: Pendleton, E.A.
Originator: Ackerman, S.D.
Publication_Date: 2021
Title:
Time Series of True Color Aerial Imagery from Small Unmanned Aircraft Systems: Little Dauphin Island & Pelican Island, Alabama, September 2018 – April 2019
Series_Information:
Series_Name: U.S. Geological Survey Data Release
Issue_Identification: Unknown
Online_Linkage: Unknown
Cross_Reference:
Citation_Information:
Originator: Goncalves, J.A.
Originator: Henriques, R.
Publication_Date: 2015
Title: UAV photogrammetry for topographic monitoring of coastal areas
Series_Information:
Series_Name: ISPRS Journal of Photogrammetry and Remote Sensing
Issue_Identification: vol. 104
Online_Linkage: https://doi.org/10.1016/j.isprsjprs.2015.02.009
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The horizontal and vertical measurements of the surface models were compared against GPS measurements of fixed features covered by the survey.
Logical_Consistency_Report:
Two of the orthomosaics (2018-12-PelicanIsland-ortho-ms-5cm.tif and 2019-03-LittleDauphinIsland-ortho-ms-5cm.tif) have 3 artifacts (total) in offshore areas. These artifacts appear as small red or green patches at the edge of the orthomosaics and these areas should not be used for analysis.
Completeness_Report:
This dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The SfM-based geospatial products have an overall horizontal root-mean-square error (RMSE) of 3.4 cm, determined by comparing the horizontal position of the surveyed temporary check points (4-square, black and white, checkerboard targets) and the corresponding horizontal positions digitized in the orthomosaic, for all surveys.
Lineage:
Process_Step:
Process_Description:
The SfM products were created for each UAS survey date individually, using the RGB digital negative (DNG) photos (Kranenburg and others, 2021). The complete set of photos was imported into Agisoft Photoscan (versions 1.3.5 - 1.5.5), along with corresponding GCP reference information, and each flight was put into separate camera calibration groups. Photos were aligned at high accuracy, with a keypoint limit of 50,000 and unlimited tiepoints. Camera positions and the lens model were refined using three statistical metrics: reconstruction uncertainty, projection accuracy, and reprojection error with threshold values of 10, 2.6-3.0, and 0.3 respectively. Once the photo positions and lens models were optimized, dense point clouds were generated with Photoscan (Goncalves and Henriques, 2015) using the high quality and moderate filtering settings. The dense point clouds were then used to generate DEMs; note that the DEM represents the elevation of the surface as viewed from above (for example, tops of buildings and vegetation), and does not represent the bare earth surface. Finally, the raw photographs and DEM were combined to produce the orthomosaics, and both DEM and orthomosaics were exported in GeoTIFF file format at 5 cm resolution. RGB photographs from the Ricoh GR II were used to create the RGB orthomosaic and the multispectral imagery from the MicaSense RedEdge 3 was used to create the multispectral orthomosaic.
Process_Date: 20190827
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Christine J. Kranenburg
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Contact_Position: Cartographer
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ckranenburg@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 16N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -87
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The multispectral orthomosaic is a 6-band (blue/green/red/near IR/red edge/alpha) raster file, with values of each band ranging from 0 to 255, in GeoTIFF format. No-data values are represented by a value of 0 in band 6 (alpha channel).
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Contact_Person: SPCMSC Data Management Group
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov
Resource_Description:
These data are available in GeoTIFF format contained in a single ZIP file of SfM products per UAS survey. The MS orthomosaic files are named with the following convention: yyyy-mm-IslandName-ortho-ms-5cm.tif where yyyy-mm represents the survey date as year (yyyy) and month (mm); IslandName can have a value of either LittleDauphinIsland or PelicanIsland; and ‘ortho-ms-5cm’ is used to designate the dataset as a 5-cm resolution MS orthomosaic.
Distribution_Liability:
This publication was prepared by an agency of the United States Government. Although these data were processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Information_Content:
The .zip file contains SfM products per UAS survey, including the orthomosaics saved as .tif files.
Digital_Transfer_Option:
Fees: None.
Metadata_Reference_Information:
Metadata_Date: 20210524
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Christine J. Kranenburg
Contact_Organization:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Contact_Position: Cartographer
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ckranenburg@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/CREMA_MS_ortho_metadata.html>
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