These files contain topographic lidar data classified as ground (2) and unclassified (1) in accordance with the American Society for
Photogrammetry and Remote Sensing (ASPRS) classification standards. These data were collected by the Compact Hydrographic Airborne Rapid
Total Survey (CHARTS) system along the coast of New Jersey. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera
and a hyperspectral scanner on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally
extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry).
The topographic lidar sensor has a pulse repetition rate of 9 kHz at 1064 nm (near-infrared wavelength). The bathymetric lidar sensor has a
pulse repetition rate of 1 kHz at 532 nm (green wavelength). Native lidar data is not generally in a format accessible to most Geographical
Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional
positions that can be imported into GIS software for visualization and further analysis.The 3-D position data are sub-divided into a series of
LAS files, each covering approximately 5 kilometers of shoreline. The file index is provided by the shape file, "nj_boxes.shp", and the
numbers used to identify files are in the "Box" field of the shape file. The LAS file naming convention is based on the year, project, area
name, "Box," and the product type. An example file name is "2010_NCMP_NJ_01_GeoClassified.las", where 2010 is the year of data collection,
NCMP is the project under which data were collected, NJ is the area of data collection, 01 is the "Box" number and "GeoClassified" is the
product type. The format of the file is LAS version 1.1.
In addition to these lidar point data, the bare earth Digital Elevation Models (DEM) created from the lidar point data are also available. These data are available for custom download at the link provided in the URL section of this metadata record.
This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data.