Metadata: Identification_Information: Citation: Citation_Information: Originator: Jenna A. Brown Originator: Christine J. Kranenburg Originator: Karen L.M. Morgan Publication_Date: 20201007 Title: Time Series of Structure-from-Motion Products - Digital Elevation Models: Madeira Beach, Florida, July 2017 to June 2018 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P9L474WC Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9L474WC 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 DEMs collected at Madeira Beach, Florida, monthly from July 2017 to June 2018 in order to observe seasonal and storm-induced changes in beach topography. 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, using surveyed permanent features (for example, parking lot stripes, concrete groin blocks) and 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 approximately 700-meter-long and 100-meter-wide stretch of coastline: * georeferenced orthomosaic image with 5-centimeter (cm) resolution * DEM with 5-cm horizontal resolution * 3D RGB-colored point cloud All horizontal data are provided in Universal Transverse Mercator (UTM) projected coordinate system, Zone 17 North (17N), referenced to the North American Datum of 1983 (NAD83 (2011)), and elevation is referenced to the North American Vertical Datum of 1988 (NAVD88), GEOID 12B. Purpose: These SfM products were produced from aerial images collected at Madeira Beach, Florida, from July 2017 to June 2018, in order to observe seasonal and storm-induced changes in beach topography. 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: 7/12/2017 FAN: 2017-338-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-338-FA ; 8/16/2017 FAN: 2017-345-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-345-FA ; 9/14/2017 FAN: 2017-347-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-347-FA ; 10/11/2017 FAN: 2017-354-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-354-FA ; 11/9/2017 FAN: 2017-366-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-366-FA ; 12/11/2017 FAN: 2017-372-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-372-FA ; 1/24/2018 FAN: 2018-307-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-307-FA ; 2/22/2018 FAN: 2018-312-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-312-FA ; 3/9/2018 FAN: 2018-315-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-315-FA ; 4/11/2018 FAN: 2018-325-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-325-FA ; 5/22/2018 FAN: 2018-336-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-336-FA ; 6/19/2018 FAN: 2018-341-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-341-FA . Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20170712 Single_Date/Time: Calendar_Date: 20170816 Single_Date/Time: Calendar_Date: 20170914 Single_Date/Time: Calendar_Date: 20171011 Single_Date/Time: Calendar_Date: 20171109 Single_Date/Time: Calendar_Date: 20171211 Single_Date/Time: Calendar_Date: 20180124 Single_Date/Time: Calendar_Date: 20180222 Single_Date/Time: Calendar_Date: 20180309 Single_Date/Time: Calendar_Date: 20180411 Single_Date/Time: Calendar_Date: 20180522 Single_Date/Time: Calendar_Date: 20180619 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -82.79985545 East_Bounding_Coordinate: -82.79358312 North_Bounding_Coordinate: 27.79920689 South_Bounding_Coordinate: 27.79405585 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: remote sensing Theme_Keyword: geospatial datasets Theme_Keyword: digital elevation models Theme_Keyword: topographic maps Theme_Keyword: coastal processes Theme_Keyword: topography 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: 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: Florida Place_Keyword: Pinellas County Place_Keyword: Madeira Beach 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. Cross_Reference: Citation_Information: Originator: Brown, J.A., Kranenburg, C.J., and Morgan, K.L.M. Publication_Date: 20200930 Title: Time Series of Aerial Imagery from Small Unmanned Aircraft Systems and Associated Ground Control Points: Madeira Beach, Florida, July 2017 to June 2018 Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P91TH157 Online_Linkage: https://doi.org/10.5066/P91TH157 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The horizontal and vertical measurements of the surface models were compared against GCP survey data of fixed features covered by the survey. Logical_Consistency_Report: All data fall within expected ranges, except points near and offshore of the waterline. Data in the point cloud near the waterline and offshore can be noisy, and may result in erroneous measurements in the DEM due to interpolation (for example regions between groins that are underwater). Also, small areas of missing and/or grossly interpolated data may exist on the northeast (non-beach) side of buildings, which were occluded in the field-of-view of the UAS imagery and cannot be reconstructed. 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. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The SfM-based geospatial products have an overall vertical root-mean-square error (RMSE) of 3.1 cm, determined by comparing the surveyed check point elevations and the corresponding elevations in the DEM, for all check points from all surveys. Lineage: Process_Step: Process_Description: The SfM products were completed for each UAS survey individually, using the digital negative (DNG) photos. The complete set of photos was imported into Agisoft Photoscan (versions 1.3.5 - 1.5.5), along with corresponding ground control point 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 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 orthomosaic, and both DEM and orthomosaic were exported in GeoTIFF file format at 5 cm resolution. Process_Date: 20191210 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: Grid Cell Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 17N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -81 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 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: Overview_Description: Entity_and_Attribute_Overview: The DEM was saved as an encoded GeoTIFF, where each pixel has an explicit elevation value associated with it. The GeoTIFFs were created from the dense point cloud in Agisoft Photoscan with interpolation enabled. The no-data value is -32767. 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 DEM files are named with the following convention: yyyymmdd_MadeiraBeachFL_dem_5cm.tif where yyyymmdd represents the survey date as year (yyyy), month (mm) and day (dd). 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 DEM saved as .tif file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20170712_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20170816_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20170914_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20171011_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20171109_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20171211_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180124_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180222_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180309_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180411_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180522_MadeiraBeachFL_SfMProducts.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9L474WC/data/20180619_MadeiraBeachFL_SfMProducts.zip Access_Instructions: Data can be downloaded as a zipped file from the Network_Resource_Name link, where yyyymmdd represents the year (yyyy), month (mm) and day (dd) of the UAS survey. Fees: None. Metadata_Reference_Information: Metadata_Date: 20200930 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