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Metadata Identifier: gov.noaa.csc.maps:2008_NWFWMD_Waltong_Eglin_m574
MD_DataIdentification
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2008 Northwest Florida Water Management District Lidar: Eglin Air Force
Base, Walton County, FL
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In the summer of 2008, the Northwest Florida Water Management District collected
lidar data over a portion of Walton County, FL (Eglin Air force Base) to support various
projects such as floodplain and hazards mapping, wetlands mitigation and stormwater
management. The data collection occured in a portion of the county for which there
is no prior collected lidar data. Used in conjunction with previously collected data
in Walton County (FDEM Lidar collected in 2006), these data support the creation of
a county-wide, high resolution, lidar derived digital elevation model(DEM).
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SV_Identification
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2008 Northwest Florida Water Management District Lidar: Eglin Air Force Base, Walton
County, FL
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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 |
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Andrew Lucero |
Sanborn Map Company, Inc |
Sr. Project Manager |
alucero@sanborn.com |
processor |
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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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John B. Crowe |
Northwest Florida Water Management District |
Associate Hydrologist |
John.Crowe@nwfwmd.state.fl.us |
pointOfContact |
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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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Northwest Florida Water Management District (NWFWMD) |
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originator |
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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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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 |
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-86.323522 |
-86.114148 |
30.605467 |
30.495943 |
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-86.323522 |
-86.114148 |
30.605467 |
30.495943 |
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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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2008-01-01T00:00:00 |
The unedited data are classified to facilitate the application of
the appropriate feature extraction filters. A combination of proprietary filters are
applied as appropriate for the production of bare earth digital terrain models (dtms).
Interactive editing methods are applied to those areas where it is inappropriate or
impossible to use the feature extraction filters, based upon the design criteria and/or
limitations of the relevant filters. These same feature extraction filters are used
to produce elevation height surfaces. The LiDAR mass points were delivered in American
Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for
each dataset is complete as define by the LAS 1.1 specification. In addition the following
fields are included: Flight Date Julian, Year, and Class. The LAS files do not include
overlap. The data was classified as follows: Class 1 = Unclassified. This class includes
vegetation, buildings, noise etc. Class 2 = Ground Class 9 = Water
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2008-01-01T00:00:00 |
Conversion from Geodetic coordinates, NAD83 into State Plane coordinates
(meters) and conversion from ellipsoid heights (meters) into orthometric heights (U.S.
Survey Feet).
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2008-06-15T00:00:00 |
The ABGPS, IMU, and raw Optech 3100 LiDAR data are integrated into
the TerraScan post processor software. The resultant file is in a LAS binary file
format. The LAS file version 1.1 formats can be easily transferred from one file format
to another. It is a binary file format that maintains information specific to the
LiDAR data (return#, intensity value, xyz, etc.). The resultant points are produced
in the geodetic coordinates referenced to the NAD83 horizontal datum and GRS80 vertical
datum. The date and time for each flight line can be determined using the Julian date
and time. The Julian date is a continuous count of days and fractions since noon Universal
Time on January 1, 4713 BCE on the Julian calendar.
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2011-03-31T00:00:00 |
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 for data storage purposes and Digital Coast provisioning:
1. The data were converted from State Plane Florida West coordinates to geographic
(NAD83) coordinates.; 2. the data were filtered to remove elevation outliers.; 3.
The data were converted from NAVD88 heights to ellipsoid heights using Geoid03.; 4.
The LAS header fields were sorted by latitude and updated.
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2011-05-13T00:00:00 |
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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