Identification_Information: Citation: Citation_Information: Originator: Joseph F. Terrano Originator: James G. Flocks Originator: Kathryn E. Smith Publication_Date: 20160325 Title: Topobathymetric Lidar Survey of Breton and Gosier Islands, Louisiana, January 16 and 18, 2014 Geospatial_Data_Presentation_Form: lidar point cloud (Digital Elevation Model) Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F70G3H6G Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.5066/F70G3H6G Description: Abstract: This dataset contains binary point-cloud data and a Digital Elevation Model (DEM), produced from remotely sensed, geographically referenced topobathymetric measurements collected by Photo Science, Inc., encompassing the Breton Island, LA study area. The original area of interest was buffered by 100 meters to ensure complete coverage, resulting in approximately 75 square miles of lidar data. The Breton Island Lidar project called for the planning, acquisition, processing, and derivative products of topobathymetric lidar data, collected at a nominal pulse spacing (NPS) of 0.5-0.45 meters (4-5 points/square meter). Lidar acquisition was prioritized to coincide with the lowest tide possible. Water clarity was also assessed and deemed acceptable prior to acquisition flights. The data, in meters, are projected to UTM Zone 16 North and referenced horizontally to the NAD83 (2011) datum and vertically to the NAVD88 (GEOID12A) datum. The classified point-cloud data were delivered in LAS v1.2 format and the merged DEM was converted to a GeoTIFF file. Each LAS file contains data in a 1-kilometer by 1-kilometer tile named according to the US National Grid conventions. Purpose: Lidar data were acquired to document the short and long-term changes of several barrier island systems in Louisiana. Digitized shorelines created from the Lidar data provide an accurate and measurable change in shape, area, and shoreline movement over short and long-term periods. Lidar, in the form of a Digital Elevation Models, can provide a measurable change in the topography of barrier island systems to track pre- and post- storm elevation changes. Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20140116 Single_Date/Time: Calendar_Date: 20140118 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -89.19718926 East_Bounding_Coordinate: -89.16698352 North_Bounding_Coordinate: 29.49840292 South_Bounding_Coordinate: 29.46161963 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: Elevation data Theme_Keyword: LiDAR Theme_Keyword: Light Detection and Ranging Theme_Keyword: LAS Point Cloud Theme_Keyword: Topography Theme_Keyword: Bathymetry Theme_Keyword: Topobathy Theme_Keyword: Depth Theme_Keyword: DEM Theme_Keyword: Digital Elevation Model Theme_Keyword: Intensity Image Theme_Keyword: remote sensing Theme_Keyword: shoreline Theme: Theme_Keyword_Thesaurus: Global Change Master Science Directory (GCMD) Theme_Keyword: LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme_Keyword: OCEAN > COASTAL PROCESSES > BARRIER ISLANDS Theme_Keyword: OCEAN > COASTAL PROCESSES > BEACHES Theme_Keyword: OCEAN > COASTAL PROCESSES > SHORELINE DISPLACEMENT Theme_Keyword: DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: Breton Island Place_Keyword: Plaquemines Parish Place_Keyword: Louisiana Place_Keyword: Gulf of Mexico Stratum: Stratum_Keyword_Thesaurus: General Stratum_Keyword: Bare Earth Stratum_Keyword: bathymetry Temporal: Temporal_Keyword_Thesaurus: General Temporal_Keyword: 2014 Access_Constraints: None Use_Constraints: The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joseph F. Terrano Contact_Organization: U.S. Geological Survey Coastal and Marine Science Center, St. Petersburg, FL, Contracted through Cherokee Nation Technology Contact_Position: Researcher 1 Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Contact_Electronic_Mail_Address: jterrano@usgs.gov Hours_of_Service: M-F, 9:00-5:00 ET Data_Set_Credit: Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such. Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3 Cross_Reference: Citation_Information: Originator: Joseph F. Terrano, James G. Flocks, and Kathryn E.L. Smith Publication_Date: 20151203 Title: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for Breton Island, Louisiana: 1869-2014 Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi-F7XS5SGM Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: http://coastal.er.usgs.gov/data-release/doi-F7XS5SGM/ Cross_Reference: Citation_Information: Originator: Joseph F. Terrano, James G. Flocks, and Kathryn E.L. Smith Publication_Date: Unpublished Title: Analysis of Shoreline and Geomorphic Change for Breton Island, Louisiana from 1869 to 2014 Series_Information: Series_Name: U.S. Geological Survey Open File Report Issue_Identification: Unpublished Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: To be determined Data_Quality_Information: Logical_Consistency_Report: "No Data" values are a result of the survey not covering the particular region, areas of turbid water, or the manual removal of lidar processing artifacts. Completeness_Report: Datasets contain complete coverage of tiles.A visual qualitative assessment was performed to ensure data completeness. The raw point cloud is of good quality and data passes Fundamental Vertical Accuracy specifications. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal accuracy details were not included in the report provided by Photo Science, Inc. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The fundamental and vertical accuracy was tested with 10 bare earth ground control points provided by the USGS. The survey checkpoints were distributed throughout the project area, where appropriate. The Root Mean Square Error (RMSE) of the vertical accuracy of this dataset is 0.03 meters. Additionally, a few ground control points were provided by the USGS in various land cover types. The land classes and number of control points are as follows: Mangroves (1), Short Grass (1), Tall Grass (1), Submerged (4), and Surf Zone (3). Despite the small sample sizes, supplemental vertical accuracy of each land cover type was calculated. All points (bare earth and land cover) were used to calculate the classified vertical accuracy. 0.060 meters Accuracy(z) at 95 percent confidence interval. Fundamental Vertical Accuracy (FVA) was assessed using 10 ground survey points provided by USGS. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. The RMSE was computed to be 0.06 m. Accuracy(z) has been tested to meet 24.5 cm FVA at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASRPS Guidelines. Lineage: Process_Step: Process_Description: Quantum Spatial provided the following steps: Lidar Pre-Processing: 1. Flight lines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Resolved kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data. 3. Developed a smoothed best estimate of trajectory (SBET) file that blended post-processed aircraft position with attitude data. Sensor head position and attitude were calculated throughout the survey. The SBET data were used extensively for laser point processing. 4. Calculated laser point position by associating SBET position to each laser point return time, scan angle, intensity, etc. Data were converted to orthometric elevations (NAVD88) by applying a Geoid12a correction. 5. Filtered out erroneous points. 6. Performed automated line-to-line calibrations for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calibrations were calculated on matching surfaces within and between each line and results were applied to all points in a flight line. Every flight line was used for relative accuracy calibration. 7. Identified and refracted all returns requiring a refraction correction. 8. Assessed statistical absolute accuracy via direct comparisons of surface points to ground survey data. Data were exported to standard LAS 1.2 format. Process_Date: 2014 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Quantum Spatial/USGS Contact_Position: Geospatial Services Contact_Address: Address_Type: mailing and physical address Address: 600 4th St. South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Hours_of_Service: Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) Process_Step: Process_Description: Quantum Spatial provided the following steps: Lidar Post-Processing: The calibrated and controlled lidar swaths were processed using proprietary automated point classification routines. These routines operate against the entire collection (all swaths, all lifts), eliminating character differences between files. Data were then distributed as virtual tiles to experienced lidar analysts for localized automatic classification, manual editing, and peer-based quality control (QC) checks. Supervisory QC monitoring of work in progress and completed editing ensured consistency of classification character and adherence to project requirements across the entire project area. Process_Date: 2014 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Quantum Spatial/USGS Contact_Position: Geospatial Services Contact_Address: Address_Type: mailing and physical address Address: 600 4th St. South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Hours_of_Service: Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point 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: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -87.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.01 Ordinate_Resolution: 0.01 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: 298.25722210100002 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.01 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL Contact_Person: Joseph F. Terrano Contact_Position: Researcher 1 Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)502-5047 Hours_of_Service: M-F, 9:00-5:00 ET Resource_Description: Breton_Island_2014_DEM Distribution_Liability: Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Any use of trade, firm, or product 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_Information_Content: Raster containing 2014 digital elevation model for Breton Island, LA. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://coastal.er.usgs.gov/data-release/doi-F70G3H6G/data/DEM_2014.tif Fees: None Metadata_Reference_Information: Metadata_Date: 20160325 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joseph F. Terrano Contact_Position: Researcher 1 Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727 502-8047 Contact_Electronic_Mail_Address: jterrano@usgs.gov Hours_of_Service: M-F, 9:00-5:00 ET Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research.