2007 South Carolina LiDAR: Charleston (partial), Jasper, and Colleton Counties
LiDAR data collection was performed utilizing a Leica ALS-50 sensor, collecting multiple
return x, y, and z data as well as intensity data. LiDAR data was processed to achieve
a bare ground surface, and was delivered in LAS format. Classified LAS data was also
used as a base for collection of hydro features, delivered in MicroStation v8 format.
The dates of collection are: 1. JASPER COUNTY (full county): 20061227 to 20070216
2. COLLETON COUNTY (full county: 20070216 to 20070323 3. CHARLESTON COUNTY (Partial
County): 20070222 to 20070223
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
Lidar Dataset Supplemental Information
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| As needed
||Lidar data was acquired for Charleston (Partial County), Jasper (full county) and
Colleton (full county) Counties, SC as part of a collaborative effort by state agencies,
FEMA and the NOAA Coastal Services Center to provide high-resolution topographic data
for floodplain mapping and other uses.
||2006-12-27 to 2007-03-23
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- Light Detection and Ranging
- Bare Ground Surface
- South Carolina
- Charleston County
- Colleton County
- Jasper County
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
| Processing Steps
- JASPER COUNTY: Utilizing Photo Science's two ALS-50 LiDAR sensors, data was collected
to cover Jasper County, South Carolina. Data was collected in a total of 111 flightlines
at a pulse rate of 75,000 points per second. COLLETON COUNTY: Utilizing Photo Science's
two ALS-50 LiDAR sensors, data was collected to cover Colleton County, South Carolina.
Data was collected in a total of 160 flightlines at a pulse rate of 75,000 points
per second. CHARLESTON COUNTY: Utilizing Photo Science's two ALS-50 LiDAR sensors,
data was collected to cover Charleston County, South Carolina. Data was collected
in a total of 77 flightlines at a pulse rate of 75,000 points per second.
- Raw LiDAR data (collected as Process Step 1) was processed to create a bare ground
surface. Process included calibration of LiDAR data to remove systematic errors (utilizing
Leica's ALS Processor software), adjustment of elevation data to control positions
(utilizing TerraScan software for control comparisons and adjustments), and both automatic
and manual editing to correctly classify ground and non-ground data (utilizing TerraScan
and TerraModeler software). In addition, QC steps were performed before and after
processing. QC steps included line-to-line vertical comparisons and coverage checks,
and were performed with TerraScan and GeoCue software.
- Following bare ground surface creation (Process Step 2),Photo Science utilized the
resulting dataset as a source for collection of hydrographic features, including double-line
drains, single-line drains, and bodies of water. Hydro features were collected from
bare ground surface models in MicroStation v8 software. After collection was complete,
Photo Science adjusted elevation of all hydro features to ensure proper monotonicity
using FME and proprietary software.
- The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained
LiDAR intensity and elevation measurements. CSC performed the following processing
on the data to make it available within the Digital Coast: 1. The data were converted
from UTM (Zone 17) coordinates to geographic coordinates. 2. The data were converted
from orthometric elevations (NAVD88) to ellipsoidal heights using Geoid 03. 3. The
LAS data were sorted by latitude and the headers were updated. 4. 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: 2014-02-12
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