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Metadata Identifier: gov.noaa.csc.maps:2007_Fl_Jefferson_m83
MD_DataIdentification
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2007 Northwest Florida Water Management District (NWFWMD) Lidar: North
Jefferson County
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LIDAR data is remotely sensed high-resolution elevation data collected by
an airborne collection platform. Using a combination of laser range finding, GPS positioning
and inertial measurement technologies; LIDAR instruments are able to make highly detailed
Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation.
Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, 262 flight lines
of high density (submeter ground sample distance) data were collected in the northern
half of Jefferson County in Florida. This data set was collected at the same time
as the collection for portions of Bay, Calhoun, Jackson and Washington Counties. Collectively,
these data sets cover approximately 1201 square miles. The Jefferson County project
covers approximately 513 square miles. The data acquisition occurred in 17 missions
between February 22, 2007 and March 13, 2007. Multiple returns were recorded for each
laser pulse along with an intensity value for each return. This data was collected
at sub-meter resolution to provide average point spacing of 0.7 m for collected points.
Up to 5 returns were recorded for each pulse in addition to an intensity value.
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SV_Identification
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2007 Northwest Florida Water Management District (NWFWMD) Lidar: North Jefferson County |
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Lidar Final Report |
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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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Citation URL |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/jefferson/ReportLidarQAQCJeffersonv2.doc |
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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 Crowe |
Northwest Florida Water Management District (NWFWMD) |
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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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Steve Jones |
Sanborn |
Project Manager |
sjones@sanborn.com |
processor |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/jefferson/ReportLidarQAQCJeffersonv2.doc |
Lidar Final Report |
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information |
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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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-84.090823 |
-83.589723 |
30.690160 |
30.290560 |
2007-02-22 |
2007-03-13 |
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-84.090823 |
-83.589723 |
30.690160 |
30.290560 |
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2007-02-22 |
2007-03-13 |
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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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Lidar Final Report |
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crossReference |
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2007 Northwest Florida Water Management District (NWFWMD) Lidar: North Jefferson County |
2007-11-02 |
Source Contribution: Type of LiDAR Scanner = LH Systems ALS50 Data
Acquisition Height = 700 meters AGL Scanner Field Of View = 40 degrees Scan Frequency
= 35 Hertz Pulse Repetition Rate - 50 Kilohertz Aircraft Speed = 120 KIAS Swath Width
= +/- 20 degrees Nominal Ground Sample Distance = 0.7 meters Number of Returns per
Pulse = 5 (first, last, intermediate) Distance Between Flight Lines = 365 meters Source
Type: Digital Tape Media
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2007-02-22T00:00:00 |
Data Collection: Using a LH Systems ALS50 Light Detection And Ranging
(LiDAR) system, 262 flight lines of high density (submeter ground sample distance)
data were collected over the northern half of Jefferson County in Florida. This data
was collected at the same time as the collection for portions of Bay, Calhoun, Jackson
and Washington Counties. Collectively, these data sets cover approximately 1201 square
miles. The Jefferson County project covers approximately 513 square miles. The data
acquisition occurred in 17 missions between February 22, 2007 and March 13, 2007.
Multiple returns were recorded for each laser pulse along with an intensity value
for each return. During the LIDAR campaign, the Sanborn field crew conducted a GPS
field survey to establish final coordinates of the ground base stations for final
processing of the base-remote GPS solutions. Four (4) airborne global positioning
system (GPS) base stations were used to support the LiDAR data acquisition. GPS ground
control check points were also collected by the LiDAR team while onsite for product
accuracy validation and delivery.
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2007-04-01T00:00:00 |
Airborne GPS Processing: Airborne GPS data was differentially processed
and integrated with the post processed IMU data to derive a smoothed best estimate
of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements
to a raw reflective surface for each flight line. The overlap between flight lines
was removed to provide a homogeneous coverage, and the coverage was classified to
extract a bare earth digital elevation model (DEM). Airborne GPS is differentially
processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta,
Canada. The PDOP and distance separation is as follows: IMU data is processed using
the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada.
The reflective surface is derived using the ALS Post Processor software by Leica Geosystems
GIS & Mapping Division of Atlanta, Georgia. The classification and quality control
(QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of
Helsinki, Finland.
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2007-05-01T00:00:00 |
IMU data Processing: IMU data provides information concerning roll,
pitch and yaw of collection platform during collection event. IMU information allows
the pulse vector to be properly placed in 3D space allowing the distance from the
aircraft reference point to be properly positioned on the elevation model surface.
IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond
Hill, Ontario, Canada.
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2007-06-01T00:00:00 |
Reflective Surface Generation: The reflective surface is derived using
the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta,
Georgia.
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2007-10-01T00:00:00 |
LIDAR Ground Point Classification: The classification and quality
control (QC) of LiDAR Ground point class is carried out using TerraScan software by
Terrasolid Limited of Helsinki, Finland. In the filtering process points are classified
as Ground or one of several non-Ground classes including Unclassified, Overlap, and
Low Points.
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2007-11-01T00:00:00 |
Reclassification of Water Points: LiDAR returns from open water surfaces
are commonly included in the Ground class by the ground filtering algorithms. Using
2D and 3D visualization methods, 2D vector polygons were digitized for significant
waterways and water bodies that were readily identifiable in the LiDAR data. These
polygons were then used to re-classify points in open water from the filtered Ground
class to the Water class.
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2007-11-09T00:00:00 |
Coordinate Reprojection: Output LAS Files LIDAR points maintained
in UTM coordinate system converted to Geographic projection with units of Decimal
Degrees
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2008-07-21T00:00:00 |
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 to make it available within the LiDAR Data Retrieval
Tool (LDART): 1. The data were converted from NAVD88 (orthometric) heights to GRS80
(ellipsoid) heights using Geoid 03. 2. The LAS header fields were sorted by latitude
and updated. 3. The data was filtered to eliminate outliers.
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2009-04-21T00:00:00 |
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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