2011 NOAA National Geodetic Survey (NGS) Lidar: Fire Island, NY and Cape May to Absecon
This kmz file shows the extent of coverage for the 2011 NGS New York/New Jersey lidar
These data were collected by the National Oceanic Atmospheric Administration National
Geodetic Survey Remote Sensing Division using a Riegl Q680i-D system. The data includes
topographic data in an LAS 1.2 format file classified as unclassified (1), ground
(2), and water (9) in accordance with the American Society for Photogrammetry and
Remote Sensing (ASPRS) classification standards. This data set also includes lidar
intensity values and encoded RGB image values. Fire Island, NY data collected on Nov
25, 2011 and the Cape May to Absecon Inlet, NJ data was collected on July 16, 2011.
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
Documentation links not available.
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| Not planned
||Data include all lidar returns. Outliers or false returns (e.g., returns from birds,
atmospheric particles, and or system noise) may be present in the data. An automated
ground classification algorithm was used to determine bare earth point classification.
It should be noted that not all water returns were correctly classified, therefore
the ground classification could proceed into water bodies, and should be removed by
||This lidar was acquired by the NOAA Remote Sensing Division to support NOAA's Coastal
Mapping Program. It is not intended for mapping, charting, or navigation. In addition,
it will be used for ongoing research efforts for testing and developing standards
for airborne lidar.
|| Unknown to Unknown
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- United States
- New York
- Fire Island
- New Jersey
- Cape May
- Absecon Inlet
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
| Processing Steps
- Data were processed to an initial LAS format using the Riegl RiProcess software. The
Applanix POSPac software was utilized for GPS and inertial processing, and Terrasolid
software for data visualization, 3D editing, and export to final LAS file. Data were
processed in NAD83 horizontal and vertical datum.
- The NOAA Coastal Services Center (CSC) received the files in las format. The files
contained LiDAR elevation as well as intensity and encoded RGB image values. The data
were in UTM, Zone 18 coordinates. CSC performed the following processing for data
storage and Digital Coast provisioning purposes: 1. The data were converted from UTM
Zone 18 coordinates to geographic coordinates. 2. The data were filtered for outliers.
3. The data were converted to LAZ format.
- The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp
transfer from the NOAA Coastal Services Center. The data are currently
being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/.
The data can be used to re-populate the system. The data are archived in LAS or LAZ
The LAS format is an industry standard for LiDAR data developed by the American Society
of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless compressed version
LAS developed by Martin Isenburg (http://www.laszip.org/). The data are exclusively
in geographic coordinates (either NAD83 or ITRF94). The data are referenced vertically
the ellipsoid (either GRS80 or ITRF94), allowing for the ability to apply the most
up to date geoid model when transforming to orthometric heights.
Metadata Last Modified: 2013-01-22
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