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Metadata Identifier: gov.noaa.csc.maps:2005_DE_Sussex_m111
MD_DataIdentification
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2005 Delaware Coastal Program Lidar: Sussex County |
The data were acquired in March 2005 using the NASA Experimental Advanced
Airborne Research Lidar (EAARL) platform in Sussex County, Delaware. Once acquired,
the data were processed by USGS personnel into both 2-foot contours and digital elevation
models. Multiple returns were recorded for each laser pulse. This is a bare earth
data set. The points have approximately a 3 m ground spacing. Water points remain
in the bare earth data set, they have not been classified as water.
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SV_Identification
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2005 Delaware Coastal Program Lidar: Sussex County |
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None |
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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 |
| 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(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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| 1 |
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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DOI/USGS > United States Geological Survey, U.S. Department of the Interior |
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originator |
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Delaware Coastal Management Program |
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originator |
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Delaware Geological Survey |
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originator |
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Delaware Geological Survey |
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delgeosurvey@udel.edu |
pointOfContact |
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| 1 |
EPSG Registry |
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European Petroleum Survey Group |
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publisher |
http://www.epsg-registry.org/ |
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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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| 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 |
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| 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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| 1 |
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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 |
| 1 |
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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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-75.723623 |
-75.046341 |
38.967831 |
38.415440 |
2005-03-01 |
2005-03-31 |
| 1 |
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-75.723623 |
-75.046341 |
38.967831 |
38.415440 |
| 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 |
Ellipsoid |
Ellipsoid in Meters |
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| 1 |
NAD83 |
urn:ogc:def:crs:EPSG::4269 |
North American Datum 1983 |
| 1 |
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2005-01-01T00:00:00 |
Data were collected by NASA EAARL (Experimental Advanced Airborne
Lidar) during March of 2005. Flying was done out of Salisbury, Maryland. Nominal post
spacing was approximately 3 meters, with data denser in areas of flight line overlap.
A GPS base station was established and operated for 1 hour prior to, during, and for
at least 30 minutes after completion of data collection flights (take off to touch
down). The GPS collected data at 1 Hz intervals. GPS data were used for aircraft location
correction. Lidar data collected for cross tracks were flown during each data collection
flight. Preliminary fundamental vertical accuracy testing was performed against data
collected by NRCS surveyors. Three landuse classes were tested woods, roads, and farm
lanes with the aggregate average RMSe being 0.102m and the greatest RMSe observed
was 0.148m. Processing was done in Airborne Lidar Processing Software (ALPS) by USGS
personnel in Reston VA. Final bare-earth point data inspection and clean up was manually
performed by USGS personnel in Dover Delaware and Baltimore, MD using ArcMap.
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| 1 |
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2009-03-31T00:00:00 |
The NOAA Coastal Services Center (CSC) received the data in shapefile
format with x, y, and z. The x, y, and z values were extracted from the shapefiles
and converted to ASCII formatted text using a processing loop in arc/info. The ASCII
files were then converted to LAS format using an internal processing script. CSC then
performed the following processing on the data to make it available within the Digital
Coast: 1. The data were converted from State Plane coordinates to geographic coordinates.
2. The data were converted from orthometric to ellipsoid heights using Geoid03. 3.
The LAS header fields were sorted by latitude and updated. 4. The data were filtered
to eliminate outliers.
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| 1 |
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2011-03-18T00:00:00 |
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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