Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Publication_Date: 2016 Title: Terrestrial-Based Lidar Beach Topography of Fire Island, New York, May 2015 Geospatial_Data_Presentation_Form: Tabular digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F7862DKH Publication_Information: Publication_Place: St. Petersburg, FL Publisher: St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/F7862DKH Larger_Work_Citation: Citation_Information: Originator: Owen Brenner Originator: Cheryl J. Hapke Originator: Kathryn G. Lee Originator: Dustin R. Kimbrow Publication_Date: 20160219 Title: Terrestrial-Based Lidar Beach Topography of Fire Island, New York, June 2014 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: Data Series 980 Publication_Information: Publication_Place: St. Petersburg, FL Publisher: St. Petersburg Coastal and Marine Science Center Online_Linkage: http://dx.doi.org/10.3133/ds980 Description: Abstract: The U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS Lower Mississippi-Gulf Water Science Center (LMG WSC) in Montgomery, Alabama, collected terrestrial-based light detection and ranging (T-lidar) elevation data at Fire Island, New York. The data were collected on May 18, 2015 as part of the ongoing beach monitoring within Hurricane Sandy Supplemental Project GS2-2B, and will be used to document and assess the morphological storm response and post-storm beach recovery. The survey extended along 30 kilometers(km) of the Fire Island National Seashore, from the eastern boundary of Robert Moses State Park to the western boundary of Smith Point County Park. This USGS Data Release includes the resulting processed elevation point data (xyz) and an interpolated digital elevation model (DEM). For further information regarding data collection and/or processing methods, refer to previously published USGS Data Series 980 (http://dx.doi.org/10.3133/ds980). Purpose: To collect, process, and disseminate beach topography data collected along 30 kilometers (km) of Fire Island, New York, from the western boundary of Fire Island National Seashore to the Wilderness Breach. To ensure that St. Petersburg Coastal and Marine Science Center (SPCMSC) data management protocols were followed, this survey was assigned a USGS field activity number (FAN), 2015-312-FA. Additional survey and data details are available at http://cmgds.marine.usgs.gov/fan_info.php?fan=2015-312-FA. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20150518 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.205662306 East_Bounding_Coordinate: -72.8661747972 North_Bounding_Coordinate: 40.7376424609 South_Bounding_Coordinate: 40.6265804221 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: elevation data Theme_Keyword: topography Theme_Keyword: ground-based lidar Theme_Keyword: terrestrial light detection and ranging system (T-lidar) Theme_Keyword: U.S. Geological Survey Theme_Keyword: Hurricane Sandy Supplemental: Fire Island Theme: Theme_Keyword_Thesaurus: Global Change Master Science Directory (GCMD) Theme_Keyword: LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme_Keyword: OCEAN > COASTAL PROCESSES > BARRIER ISLANDR Theme_Keyword: OCEAN > COASTAL PROCESSES > BEACHES Theme_Keyword: DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR Theme: Theme_Keyword_Thesaurus: GCMD Instrument Theme_Keyword: LIDAR > LIGHT DETECTION AND RANGING Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: distributions Theme_Keyword: bathymetry and elevation Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords Theme_Keyword: altimetry Theme_Keyword: topographic mapping Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: LIDAR Theme_Keyword: topography Theme_Keyword: digital elevation models Place: Place_Keyword_Thesaurus: General Place_Keyword: Fire Island Place_Keyword: Fire Island National Seashore Place_Keyword: Long Island Place_Keyword: New York Place_Keyword: United States Temporal: Temporal_Keyword_Thesaurus: General Temporal_Keyword: 2015 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, St Petersburg Coastal and Marine Science Center, as the originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Owen Brenner Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St Petersburg State_or_Province: FL Postal_Code: 33701-4846 Country: USA Contact_Voice_Telephone: 727-502-8085 Contact_Facsimile_Telephone: 727-502-8001 Contact_Electronic_Mail_Address: obrenner@usgs.gov Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The errors associated with the collection of elevation data can be classified as systematic or random. Systematic errors are those that can be measured or modeled through calibration (Byrnes and others, 2002). Random errors are a result of the limitations of the measuring device and an inability to perfectly model the systematic errors. Applanix’s POSPac MMS software creates a positional accuracy file which is compared to 38 control points occupied prior to the T-lidar survey using a real-time kinematic global positioning system (RTK-GPS) unit to evaluate the accuracy of the post-processed Smoothed Best Estimate of Trajectory (SBET) solution. The horizontal accuracy of the post-processed file has a minimum and maximum root mean square error (RMSE) of 0.5 and 1.8 centimeters (cm), respectively. The RMSE of the vertical accuracy ranged from 0.8 to 2.6 cm. Stated accuracies are based on peak-to-peak errors. Logical_Consistency_Report: Beach morphology data of Fire Island, New York were collected by USGS Lower Mississippi-Gulf Water Science Center (LMG WSC) using a truck-mounted mobile T-lidar. The T-lidar instrument was mounted on top of a truck, and covered 30 km of Fire Island beach at speeds of less than 16 km per hour. Data were collected May 18, 2015. This system is composed of an Optech ILRIS HD-ER-MC high frequency laser scanner in conjunction with an Applanix POSMV inertial measurement unit (IMU). A global positioning system (GPS) base station was set up on a nearby benchmark and logged vertical and horizontal position information during the survey for post-processing. During post-processing, the POSPac MMS software uses differential correction algorithms to compute a SBET file. The SBET file is then applied to the raw T-lidar data along with the boresight parameter file using Optech Parser software to produce a geo-referenced point-cloud dataset. Thirty-eight additional topographic data points were collected for survey control using a RTK-GPS unit, which was used to assess system accuracy and variability. Point Cloud data is filtered and edited within Innovmetric Polyworks software to remove vegetation and any problematic or outlier point values. Completeness_Report: This dataset is considered complete for the information presented, as described in the abstract section. 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 horizontal accuracy of the post-processed file has a minimum and maximum root mean square error (RMSE) of 0.5 and 1.8 cm, respectively. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The RMSE of the vertical accuracy ranged from 0.8 to 2.6 cm. Stated accuracies are based on peak-to-peak errors. Lineage: Process_Step: Process_Description: Pre-Survey Calibration: The mobile T-lidar system requires a rigorous calibration procedure before accurate datasets can be generated. All instrumentation must first be surveyed, and their relative positions (lever arms) must be resolved with respect to the origin point of the IMU. Next, a boresight procedure is performed in order to determine the angular differences (that is, roll, pitch, and heading) between the IMU and the T-lidar instrument. Process_Date: 2015 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Lower Mississippi-Gulf Water Science Center (LMG WSC) Contact_Person: Katie G. Lee Contact_Position: Hydraulic Engineer Contact_Address: Address_Type: mailing and physical address Address: USGS Alabama Water Science Center Address: 75 Technacenter Drive City: Montgomery State_or_Province: AL Postal_Code: 36117 Country: USA Contact_Voice_Telephone: 334-395-4120 Contact_Facsimile_Telephone: 334-395-4168 Contact_Electronic_Mail_Address: kmlee@usgs.gov Contact_Instructions: http://al.water.usgs.gov/ Process_Step: Process_Description: SBET and Point Cloud Creation: The POSMV system collected attitude and trajectory information during the survey, and these data were later post-processed using Applanix POSPac MMS (2013) software with GPS data, collected at a nearby benchmark. The POSPac MMS software uses differential correction algorithms to compute a smoothed best estimate of trajectory (SBET) file and associated positional accuracy report of the processed SBET. The SBET file is then applied to the raw T-lidar data along with the boresight parameter file using Optech Parser software to produce a geo-referenced point-cloud dataset. Process_Date: 2015 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Lower Mississippi-Gulf Water Science Center (LMG WSC) Contact_Person: Katie G. Lee Contact_Position: Hydraulic Engineer Contact_Address: Address_Type: mailing and physical address Address: USGS Alabama Water Science Center Address: 75 Technacenter Drive City: Montgomery State_or_Province: AL Postal_Code: 36117 Country: USA Contact_Voice_Telephone: 334-395-4120 Contact_Facsimile_Telephone: 334-395-4168 Contact_Electronic_Mail_Address: kmlee@usgs.gov Contact_Instructions: http://al.water.usgs.gov/ Process_Step: Process_Description: Using Innovmetric Polyworks software, the point clouds were filtered using several methods: (1) intensity, (2) height above a digital elevation model (DEM) surface, and (3) visual inspection. A preliminary DEM surface was created using a 0.25-meter (m) grid, and points that were 0.1 m higher than the generated surface were removed. Vegetation was removed by selecting points above a DEM surface. Each point within the point cloud has an intensity value (ranges from 0 to 255) associated with it that represents the amount of near-infrared reflectance received by the T-lidar instrument. The points with relatively low intensity values were examined and removed, if necessary. Once the data were filtered, an updated DEM surface was generated and manually edited to remove any remaining outliers. Additionally, the data were edited to smooth out any differences caused by temporal data collection. The final ASCII text file containing xyz point-cloud data is then created at 1-m horizontal resolution. Process_Date: 2015 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Lower Mississippi-Gulf Water Science Center (LMG WSC) Contact_Person: Katie G. Lee Contact_Position: Hydraulic Engineer Contact_Address: Address_Type: mailing and physical address Address: USGS Alabama Water Science Center Address: 75 Technacenter Drive City: Montgomery State_or_Province: AL Postal_Code: 36117 Country: USA Contact_Voice_Telephone: 334-395-4120 Contact_Facsimile_Telephone: 334-395-4168 Contact_Electronic_Mail_Address: kmlee@usgs.gov Contact_Instructions: http://al.water.usgs.gov/ Process_Step: Process_Description: Within Esri’s ArcCatalog, the ASCII xyz point cloud file was converted to an ArcGIS multipoint feature using the ASCII 3D To Feature Class tool. Using the Feature Class Z To ASCII tool the point data was reverted back to ASCII txt format containing xyz data for publication, in a non-proprietary format and projected in Universal Transverse Mercator (UTM) Zone 18N (meters). Process_Date: 2016 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Contact_Person: Owen Brenner Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: 727-502-8085 Contact_Facsimile_Telephone: 727-502-8001 Contact_Electronic_Mail_Address: obrenner@usgs.gov Process_Step: Process_Description: Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Process_Date: 20170124 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alan O. Allwardt Contact_Position: Contractor -- Information Specialist Contact_Address: Address_Type: mailing and physical address Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-460-7551 Contact_Facsimile_Telephone: 831-427-4748 Contact_Electronic_Mail_Address: aallwardt@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 1,268,622 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.000000 Ordinate_Resolution: 1.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum 1983 Ellipsoid_Name: Geodectic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum 1988 Altitude_Resolution: 0.0001 cm Altitude_Distance_Units: meter Altitude_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 20150518_FI_USGS_XYZ.txt Entity_Type_Definition: Tab delimited txt Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: POINT_X Attribute_Definition: UTM x-axis coordinate (Zone 18N) Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 651746 Range_Domain_Maximum: 680189 Attribute_Units_of_Measure: Meter Attribute: Attribute_Label: POINT_Y Attribute_Definition: UTM y-axis coordinate (Zone 18N) Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4499487 Range_Domain_Maximum: 4511186 Attribute_Units_of_Measure: Meter Attribute: Attribute_Label: POINT_Z Attribute_Definition: z- value Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.8176 Range_Domain_Maximum: 6.3278 Attribute_Units_of_Measure: meters Overview_Description: Entity_and_Attribute_Overview: Comma delimited xyz file containing UTM X, UTM Y locations and corresponding Z elevation value, all in meters. Entity_and_Attribute_Detail_Citation: Beach topography point data for Fire Island, New York, which was created from data collected during a ground-based lidar survey on May 18, 2015. 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: Owen Brenner 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: 727-502-8085 Contact_Facsimile_Telephone: 727-502-8001 Resource_Description: 20150518_FI_USUS_XYZ.txt 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: ASCII Format_Version_Number: 9.20 Format_Specification: Zip file containing space delimited xyz point elevation file File_Decompression_Technique: Use WinZip or 7-Zip Transfer_Size: 86.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7862DKH/data/20150518_FI_USGS_DEM.zip Access_Instructions: https://doi.org/10.5066/F7862DKH Fees: None Metadata_Reference_Information: Metadata_Date: 20170727 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Contact_Person: Owen Brenner Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: Florida Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: 727-502-8085 Contact_Facsimile_Telephone: 727-502-8001 Contact_Electronic_Mail_Address: obrenner@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998