Topographic Lidar Survey of Dauphin Island, Alabama and Chandeleur, Stake, Grand Gosier and Breton Islands, Louisiana, July 12-14, 2013 -- Classified Point Data

A topographic lidar survey was conducted July 12-14, 2013 over Dauphin Island, Alabama and Chandeleur, Stake, Grand Gosier and Breton Islands, Louisiana.
Lidar data exchange format (LAS) 1.2 formatted classified point data files were generated based on these data.
Photo Science, Inc. was contracted by the U.S. Geological Survey (USGS) to collect and process the lidar data.
The lidar data were collected at a nominal pulse spacing (NPS) of 1.0 meter (m).
The 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.
Eighty-five LAS files, based on a 2-kilometer by 2-kilometer tiling scheme, cover the entire survey area.
These lidar data are available to Federal, State and local governments, emergency-response officials, resource managers, and the general public.
Lidar_Information
Lidar_Collection_Information
Lidar_Specification  USGS-NGP Base Lidar Specification v1.0
Lidar_Sensor  Leica ALS 70
Lidar_Maximum_Returns  4
Lidar_Pulse_Spacing  0.64
Lidar_Density  1.57
Lidar_Flight_Height  1524
Lidar_Flight_Speed  130
Lidar_Scan_Angle  20.0
Lidar_Scan_Frequency  29.6
Lidar_Pulse_Rate  178.4
Lidar_Pulse_Duration  4
Lidar_Pulse_Width  0.35
Lidar_Central_Wavelength  1064
Lidar_Multiple_Pulses_In_Air  0
Lidar_Beam_Divergence  0.22
Lidar_Swath_Width  1109.38
Lidar_Swath_Overlap  11.46%
Lidar_Coordinate_Reference_System_Name  NAD_1983_UTM_Zone_16N_Meters
Lidar_Geoid  National Geodetic Survey (NGS) Geoid03
Lidar_Accuracy_Information
Lidar_Calculated_Horizontal_Accuracy  0.012
Lidar_Raw_Fundamental_Vertical_Accuracy  0.01
Lidar_LAS_Information
Lidar_LAS_Version  1.2
Lidar_LAS_Point_Record_Format  1
Lidar_LAS_Witheld_Point_Identifier  Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.
Lidar_LAS_Overage_Point_Identifier  Swath "overage" points were identified in these files by adding 16 to the standard classification values.
Lidar_LAS_Radiometric_Resolution  8
Lidar_LAS_Classification
Lidar_LAS_Class_Code  1
Lidar_LAS_Class_Description  Processed, but unclassified
Lidar_LAS_Classification
Lidar_LAS_Class_Code  2
Lidar_LAS_Class_Description  Bare earth ground
Lidar_LAS_Classification
Lidar_LAS_Class_Code  7
Lidar_LAS_Class_Description  Noise
Lidar_LAS_Classification
Lidar_LAS_Class_Code  9
Lidar_LAS_Class_Description  Water
Lidar_LAS_Classification
Lidar_LAS_Class_Code  10
Lidar_LAS_Class_Description  Ignored ground
Lidar_LAS_Classification
Lidar_LAS_Class_Code  17
Lidar_LAS_Class_Description  Overlap default (unclassified)
Lidar_LAS_Classification
Lidar_LAS_Class_Code  18
Lidar_LAS_Class_Description  Overlap bare-earth ground

Tags: alabama, altimetry, bare-earth, barrier-islands, bathymetry-and-elevation, breton-island, chandeleur-islands, coastal-processes-gt-beaches, dauphin-island, digital-elevation-models, distributions, doi-usgs-cmg-gt-coastal-and-marine-geology-u-s-geological-survey-u-s-department-of-interior, elevation-data, grand-gosier-island, gulf-of-mexico, gulf-of-mexico-barrier-islands, hydrology, land-surface-gt-topography-gt-terrain-elevation, laser-altimetry, lidar, lidar-gt-light-detection-and-ranging, louisiana, model, ocean-gt-coastal-processes-gt-barrier-islands, remote-sensing, stake-island, topographic-mapping, topography, united-states, usgs-8ddfaf9a-187f-4aa1-8cfc-1da8352009ff
Organization: Department of the Interior