{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Nathaniel Plant", "hasEmail": "mailto:nplant@usgs.gov"}, "description": "A topographic lidar survey was conducted July 12-14, 2013 over Dauphin Island, Alabama and Chandeleur, Stake, Grand Gosier and Breton Islands, Louisiana.\nLidar data exchange format (LAS) 1.2 formatted classified point data files were generated based on these data.\nPhoto Science, Inc. was contracted by the U.S. Geological Survey (USGS) to collect and process the lidar data.\nThe lidar data were collected at a nominal pulse spacing (NPS) of 1.0 meter (m).\nThe horizontal projection and datum of the data are Universe Transverse Mercator, zone 16N, North American Datum 1983 (UTM Zone 16N NAD83), meters. The vertical datum is North American Vertical Datum 1988, Geoid 2012a (NAVD88, GEOID12A), meters.\nEighty-five LAS files, based on a 2-kilometer by 2-kilometer tiling scheme, cover the entire survey area.\nThese lidar data are available to Federal, State and local governments, emergency-response officials, resource managers, and the general public.\nLidar_Information\nLidar_Collection_Information\nLidar_Specification  USGS-NGP Base Lidar Specification v1.0\nLidar_Sensor  Leica ALS 70\nLidar_Maximum_Returns  4\nLidar_Pulse_Spacing  0.64\nLidar_Density  1.57\nLidar_Flight_Height  1524\nLidar_Flight_Speed  130\nLidar_Scan_Angle  20.0\nLidar_Scan_Frequency  29.6\nLidar_Pulse_Rate  178.4\nLidar_Pulse_Duration  4\nLidar_Pulse_Width  0.35\nLidar_Central_Wavelength  1064\nLidar_Multiple_Pulses_In_Air  0\nLidar_Beam_Divergence  0.22\nLidar_Swath_Width  1109.38\nLidar_Swath_Overlap  11.46%\nLidar_Coordinate_Reference_System_Name  NAD_1983_UTM_Zone_16N_Meters\nLidar_Geoid  National Geodetic Survey (NGS) Geoid03\nLidar_Accuracy_Information\nLidar_Calculated_Horizontal_Accuracy  0.012\nLidar_Raw_Fundamental_Vertical_Accuracy  0.01\nLidar_LAS_Information\nLidar_LAS_Version  1.2\nLidar_LAS_Point_Record_Format  1\nLidar_LAS_Witheld_Point_Identifier  Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.\nLidar_LAS_Overage_Point_Identifier  Swath \"overage\" points were identified in these files by adding 16 to the standard classification values.\nLidar_LAS_Radiometric_Resolution  8\nLidar_LAS_Classification\nLidar_LAS_Class_Code  1\nLidar_LAS_Class_Description  Processed, but unclassified\nLidar_LAS_Classification\nLidar_LAS_Class_Code  2\nLidar_LAS_Class_Description  Bare earth ground\nLidar_LAS_Classification\nLidar_LAS_Class_Code  7\nLidar_LAS_Class_Description  Noise\nLidar_LAS_Classification\nLidar_LAS_Class_Code  9\nLidar_LAS_Class_Description  Water\nLidar_LAS_Classification\nLidar_LAS_Class_Code  10\nLidar_LAS_Class_Description  Ignored ground\nLidar_LAS_Classification\nLidar_LAS_Class_Code  17\nLidar_LAS_Class_Description  Overlap default (unclassified)\nLidar_LAS_Classification\nLidar_LAS_Class_Code  18\nLidar_LAS_Class_Description  Overlap bare-earth ground", "distribution": [{"@type": "dcat:Distribution", "accessURL": "http://pubs.usgs.gov/ds/0838/", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.8ddfaf9a-187f-4aa1-8cfc-1da8352009ff.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_8ddfaf9a-187f-4aa1-8cfc-1da8352009ff", "keyword": ["Alabama", "Barrier Islands", "Breton Island", "COASTAL PROCESSES > BEACHES", "Chandeleur Islands", "DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR", "Dauphin Island", "Grand Gosier Island", "Gulf of Mexico", "Gulf of Mexico Barrier Islands", "LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION", "LIDAR", "LIDAR > LIGHT DETECTION AND RANGING", "Louisiana", "OCEAN > COASTAL PROCESSES > BARRIER ISLANDS", "Stake Island", "USGS:8ddfaf9a-187f-4aa1-8cfc-1da8352009ff", "United States", "altimetry", "bare earth", "bathymetry and elevation", "digital elevation models", "distributions", "elevation data", "hydrology", "laser altimetry", "lidar", "model", "remote sensing", "topographic mapping", "topography"], "modified": "2020-10-13T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-89.2054218436926, 29.4515909261428, -88.0228864379435, 30.3016091270762", "theme": ["geospatial"], "title": "Topographic Lidar Survey of Dauphin Island, Alabama and Chandeleur, Stake, Grand Gosier and Breton Islands, Louisiana, July 12-14, 2013 -- Classified Point Data"}