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Metadata Identifier: gov.noaa.csc.maps:1997_FallWC_m3
MD_DataIdentification
| 1 |
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1996-2000 NOAA/USGS/NASA Airborne LiDAR Assessment of Coastal Erosion
(ALACE) Project for the US Coastline
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This data set includes data collected from 1996-2000 and covers the states
of AL,FL,LA,MS,DE,MD,VA,CT,MA,ME,NH, NJ,NY,RI,NC,SC,GA,CA OR,WA,TX OH,PA. Laser beach
mapping uses a pulsed laser ranging system mounted onboard an aircraft to measure
ground elevation and coastal topography. The laser emits laser beams at high frequency
and is directed downward at the earth's surface through a port opening in the bottom
of the aircraft's fuselage. The laser system records the time difference between emission
of the laser beam and the reception of the reflected laser signal in the aircraft.
The aircraft travels over the beach at approximately 60 meters per second while surveying
from the low water line to the landward base of the sand dunes.
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SV_Identification
| 1 |
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1996-2000 NOAA/USGS/NASA Airborne LiDAR Assessment of Coastal Erosion (ALACE) Project
for the US Coastline
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| 2 |
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None |
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| 1 |
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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| 1 |
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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| 1 |
NOAA CSC (pointOfContact) |
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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 |
pointOfContact |
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| 1 |
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 |
|
| 1 |
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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| 1 |
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 |
|
| 1 |
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Pamela Grothe |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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processor |
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Bounding Box |
Temporal Extent |
| 1 |
|
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-124.621351 |
-69.692954 |
47.885630 |
25.633621 |
1996-10-09 |
2000-11-02 |
| 1 |
|
-124.621351 |
-69.692954 |
47.885630 |
25.633621 |
| 1 |
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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| 1 |
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The vertical values in this data set have been filtered through visual
inspection to find abnormally high and abnormally low values. In addition, this data
was processed using a spatial filtering program that identifies and discards outlier
elevation measurements. This program reads each elevation measurement within a file
and identifies "spatially close" points (i.e. those neighboring points within a fixed
radius of the point). The mean and standard deviation is calculated using the elevations
of these points. If the elevation difference from the mean of the point under consideration
is more than 2 standard deviations and greater than a defined distance the point is
discarded.
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| 1 |
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2011-04-26T00:00:00 |
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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