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Metadata Identifier: gov.noaa.csc.maps:2001_NC_PhaseI_m1397
MD_DataIdentification
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2001 North Carolina Floodplain Mapping Program (NCFMP) Lidar: Phase 1A
(Neuse, Pasquotank, Tar-Pamlico, White Oak River Basins)
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This airborne LiDAR terrain mapping data was acquired January through March
2001. The data were collected for the floodplain mapping program for the state of
North Carolina. The data were collected for the state in three phases: 1, 2, and 3.
This metadata record describes that data that were in phase 1 of collection and fall
within the Neuse, Pasquotank, Tar-Pamlico, and White Oak River Basins in central and
eastern North Carolina. This area consists of 33 counties which are listed below in
the Place Keywords field. The data were received by the NOAA Coastal Services Center
from the U.S. Geological Survey (USGS) Center for Lidar Coordination and Knowledge
(CLICK). For data storage and Digital Coast provisioning purposes, the CSC converted
the data to geographic coordinates and ellipsoid (Geoid99) elevations. The data are
unclassified.
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SV_Identification
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2001 North Carolina Floodplain Mapping Program (NCFMP) Lidar: Phase 1A (Neuse, Pasquotank,
Tar-Pamlico, White Oak River Basins)
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Geographic Names Information System |
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Keywords |
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North American Datum 1983 |
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resourceProvider |
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 |
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NOAA CSC (originator) |
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DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
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csc.info@noaa.gov |
originator |
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NOAA CSC (publisher) |
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DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
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csc.info@noaa.gov |
publisher |
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NOAA CSC(distributor) |
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DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
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csc.info@noaa.gov |
distributor |
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NOAA CSC (processor) |
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DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
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csc.info@noaa.gov |
processor |
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EPSG Registry |
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European Petroleum Survey Group |
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publisher |
http://www.epsg-registry.org/ |
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Floodplain Mapping Program, North Carolina Division of Emergency Management |
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originator |
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Harold Rempel |
EarthData International of North Carolina |
LIDAR Production Manager |
hrempel@earthdata.com |
processor |
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Mike Sutherland(author) |
Mike Sutherland |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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mike.sutherland@noaa.gov |
author |
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Mike Sutherland |
Mike Sutherland |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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mike.sutherland@noaa.gov |
distributor |
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Mike Sutherland (processor) |
Mike Sutherland |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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mike.sutherland@noaa.gov |
processor |
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NC Floodplain Mapping Program |
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hmorgan@ncem.org |
pointOfContact |
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http://www.epsg-registry.org/ |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations.
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search |
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http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 |
NAD83 |
Link to Geographic Markup Language (GML) description of reference system. |
information |
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Ellipsoid in Meters |
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urn:ogc:def:crs:EPSG::4269 |
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Bounding Box |
Temporal Extent |
| 1 |
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-79.241832 |
-75.451653 |
36.563854 |
34.464308 |
2001-01-03 |
2001-03-23 |
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-79.241832 |
-75.451653 |
36.563854 |
34.464308 |
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Lidar Use Limitation |
These data depict the elevations at the time of the survey and are only
accurate for that time. Users should be aware that temporal changes may
have occurred since this data set was collected and some parts of this data may no
longer represent actual surface conditions. Users should not use this data
for critical applications without a full awareness of its limitations. Any conclusions
drawn from analysis of this information are not the responsibility of NOAA
or any of its partners. These data are NOT to be used for navigational purposes.
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Ellipsoid |
Ellipsoid in Meters |
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NAD83 |
urn:ogc:def:crs:EPSG::4269 |
North American Datum 1983 |
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Tiling Automated filtering for point classification, Manual editing
to classify points, Quality control, Removal of all points not classified as bare
earth
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The methods used to develop these data for the North Carolina Floodplain
Mapping Program are documented in LIDAR Bare Earth Mass Points and Breaklines Technical
Document, available online at www.ncfloodmaps.com.
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2001-02-01T00:00:00 |
All data collection flights were initialized and finalized during
periods of GPS Position Dilution of Precision greater than 4. GPS data quality was
evaluated post-flight to ensure sufficient quality for LIDAR data requirements and
integration. GPS base maximum allowable distance between stations was established
such that no more than a 50 mile radius occurred between occupations. Swath width
of terrain covered in a single flightline for inland areas at an altitude of 12,000
feet AMT was approximately 3,411 meters, coastal areas at an altitude of 8,000 feet
AMT was approximately 2,274 meters. Field of View for the Leica GeoSystems Aeroscan
system used was 50 degrees project wide, or 25 degrees from nadir with a maximum of
5 returns collected for each pulse. Ground distance between flightlines for inland
areas at 12,000 feet AMT was approximately 2,388 meters, for coastal areas at 8,000
feet AMT was approximately 1,592 meters. Nominal post spacing for finalized Bare Earth
product was 3 meters. An average of 10-20 rapid static GPS survey collected ground
control points were established per base airport project wide to detect and correct
horizontal and vertical bias. Typically, 3 or more flightlines of LIDAR returns were
collected for each airport lift, one of which being bi-directional for use in optimizing
instrument boresight angles to account for aircraft pitch, yaw and roll. All post
process collection quality assurance is achieved aided by airport cross and bi-directional
flightlines, entire lift cross flightlines, and the use of surveyed ground control
points.
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2001-02-01T00:00:00 |
Checking for coverage and anomalies, Airport calibration, Production
flightline calibration, and Removal of blunders
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2012-12-01T00:00:00 |
The lidar point data were received by the NOAA Coastal Services Center
from the USGS Center for Lidar Coordination and Knowledge (CLICK) in las format. The
files contained lidar elevation and intensity measurements. The data were unclassified,
in State Plane coordinates, and were vertically referenced to NAVD88. CSC performed
the following processing for data storage and Digital Coast provisioning purposes:
1. The data were converted from State Plane coordinates to geographic coordinates.
2. The data were converted from orthometric (NAVD88) heights to ellipsoidal heights
using Geoid99. 3. The data were sorted by time. 4. The data were converted to LAZ
format.
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2013-02-20T00:00:00 |
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 heights.
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