2005 United States Army Corps of Engineers (USACE) Post-Hurricane Katrina Levee Surveys
These topographic data were collected for the U.S. Army Corps of Engineers by a helicopter-mounted
LiDAR sensor over the New Orleans Hurricane Protection Levee System in Louisiana.
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
||System Specifications - Laser scan rate 50 hertz, laser beams per scan 200, scan rate
10,000 points per second per laser, scan angle 60 degrees, flight altitude 60 meters
AGL, forward speed 15 meters per second.
||The LiDAR data was collected to assess hurricane Katrina's damage to the levee system.
||2005-09-13T14272500Z to 2005-09-18T20120300Z
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
| Processing Steps
- The NOAA Coastal Services Center (CSC) received files in ascii format. The files contained
LiDAR elevation measurements. The xy data in the files were in LA State Plane feet
and elevations were in US feet. CSC performed the following processing on the data
to make it available within the LiDAR Data Retrieval Tool (LDART): 1. Each LiDAR xyz
point within the ascii file was reprojected to geographic decimal degrees using GCTP
and elevations were converted from U.S. survey feet to meters. The data were then
converted to binary las files. Default values for which there is no corresponding
input were assigned as follows for each las elevation data record: intensity = 0,
retn = 1, nret = 1, class = 0. 2. The las files were sorted by latitude and the las
header fields were updated. 3. Elevations converted to ellipsoid.
- 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: 2013-06-12
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