USACE 2006 East Coast Topo/Bathy Mapping project
These data were collected by the Joint Airborne Lidar Bathymetry Technical Center
of Expertise using the CHARTS system. The data includes hydrographic and topographic
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:
|| As needed
||These data were collected as a part of the National Coastal Mapping Program to depict
the elevations above and below water along the east coastal zone .
||2005-12-11 to 2006-02-05
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- South Carolina
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
- Coastal Remote Sensing Program
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
| Processing Steps
- These data were collected using a SHOALS-1000T system. It is owned and operated by
Fugro Pelagos performing contract survey services for the US Army Corps of Engineers.
The system collects topographic lidar data at 10kHz and hydrographic data at 1kHz.
The system also collects RGB imagery at 1Hz. Aircraft position, velocity and acceleration
information are collected through a combination of Novatel and POS A/V equipment.
Raw data are collected and transferred to the office for downloading and processing
in SHOALS GCS software. GPS data are processed using POSPac software and the results
are combined with the lidar data to produce 3-D positions for each lidar shot. These
data are edited using Fledermaus software where anomalous data are removed from the
dataset. The edited data are unloaded from SHOALS GCS, converted from ellipsoid to
orthometric heights, based on the GEOID03 model, and split into greographic tiles
covering approximately 5km each.
- The NOAA Coastal Services Center (CSC) received files in ascii format. The files contained
lidar intensity and elevation measurements. CSC performed the following processing
on the data to make it available within the Lidar Data Retrieval Tool (LDART): 1.
Each hydro/topo last return ascii file was converted to 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.
- 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 format. 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 of 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 to the ellipsoid (either GRS80 or ITRF94), allowing for
the ability to apply the most up to date geoid model when transforming to orthometric
Metadata Last Modified: 2013-06-11
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