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Metadata Identifier: gov.noaa.csc.maps:2006_FL_SWFWMD_Peace_River_South_m77
MD_DataIdentification
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2005/2006 Southwest Florida Water Management District (SWFWMD) Lidar:
Peace River South (including Carter Creek)
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The Light Detection and Ranging (LiDAR) LAS dataset is a survey of select
areas within Southwest Florida. These data were produced for the Southwest Florida
Water Management District (SWFWMD). Two SWFWMD datasets are included in this metadata
record; they are Peace River South and Carter Creek. The Carter Creek portion of this
data is a small data set in the northwestern part of Highlands County, which has been
appended to the larger data set of Peace River South for ease of use within the NOAA
Coastal Services Center (CSC) Lidar Data Retrieval Tool (LDART). Information that
is specific to each data set has been maintained. PEACE RIVER SOUTH The Peace River
South LiDAR (P692)Survey project area consists of approximately 1,801 square miles
and covers Hardee and DeSoto Counties and portions of Highlands and Charlotte Counties.
The LiDAR point cloud was flown at a density sufficient to support a maximum final
post spacing of 6 feet for unobscured areas. 3001 inc. acquired 445 flightlines between
February 11, 2005 and April 14, 2005. The data was divided into 5000' by 5000' foot
cells that serve as the tiling scheme. The Peace River South LiDAR Survey was collected
under the guidance of a Professional Mapper/Surveyor. CARTER CREEK The Carter Creek
LiDAR Survey project area consists of approximately 26 square miles and is located
in northwestern Highlands County. The LiDAR point cloud was flown at a density sufficient
to support a maximum final post spacing of 4 feet for unobscured areas. 3001 Inc.
acquired 60 flightlines between February 6, 2006 and February 7, 2006. The data was
divided into 5000' by 5000' foot cells that serve as the tiling scheme. The Carter
Creek LiDAR Survey was collected under the guidance of a Professional Mapper/Surveyor.
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SV_Identification
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2005/2006 Southwest Florida Water Management District (SWFWMD) Lidar: Peace River
South (including Carter Creek)
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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/swfwmd/Carter_Creek_survey_report.pdf |
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3001 Inc. |
LiDAR Manager |
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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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Mapping and GIS Section |
Southwest Florida Water Management District |
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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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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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Southwest Florida Water Management District (SWFWMD) |
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originator |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/swfwmd/Carter_Creek_survey_report.pdf |
Lidar Final Report |
Carter Creek Report |
information |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/swfwmd/Peace_River_South_Ground_Control_Report.pdf |
Lidar Final Report |
Southern Peace River Ground Control Report |
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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-82.095741 |
-81.370853 |
27.648729 |
26.768404 |
2005-02-11 |
2006-02-07 |
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-82.095741 |
-81.370853 |
27.648729 |
26.768404 |
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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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2005-01-01T00:00:00 |
The ABGPS, inertial measurement unit (IMU), and raw scans are collected
during the LiDAR aerial survey. The ABGPS monitors the xyz position of the sensor
and the IMU monitors the orientation. During the aerial survey laser pulses reflected
from features on the ground surface are detected by the receiver optics and collected
by the data logger. GPS locations are based on data collected by receivers on the
aircraft and base stations on the ground. The ground base stations are placed no more
than 35 km radius from the flight survey area. Process date for Carter Creek is 2006.
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2005-01-01T00:00:00 |
The ABGPS, IMU, and raw scans are integrated using proprietary software
developed by the Leica Geosystems and delivered with the Leica ALS50 System. The resultant
file is in a LAS binary file format. The LAS file version 1.0 format 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 State Plane Florida West coordinate system, with
units in feet and referenced to the NAD83 horizontal datum and NAVD88 vertical datum.
Process date for Carter Creek is 20060726.
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2005-01-01T00:00:00 |
The unedited data are classified to facilitate the application of
the appropriate feature extraction filters. A combination of proprietary filters is
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. Process date for Carter Creek is 20060802.
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2005-01-01T00:00:00 |
Filtered and edited data are subjected to rigorous QA/QC according
to the 3001 Inc. Quality Control Plan and procedures. Very briefly, a series of quantitative
and visual procedures are employed to validate the accuracy and consistency of the
filtered and edited data. Ground control is established by 3001, Inc. and GPS-derived
ground control points (GCPs) points in various areas of dominant and prescribed land
cover. These points are coded according to land cover, surface material and ground
control suitability. A suitable number of points are selected for calculation of a
statistically significant accuracy assessment as per the requirements of the National
Standard for Spatial Data Accuracy. A spatial proximity analysis is used to select
edited lidar data points within a specified distance of the relevant GCPs. A search
radius decision rule is applied with consideration of terrain complexity, cumulative
error and adequate sample size. Accuracy validation and evaluation is accomplished
using proprietary software to apply relevant statistical routines for calculation
of Root Mean Square Error (RMSE) and the National Standard for Spatial Data Accuracy
(NSSDA) according to Federal Geographic Data Committee (FGDC) specifications. Process
date for Carter Creek is 20060807-20060914.
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2006-01-01T00:00:00 |
The LiDAR mass points were delivered in American Society for Photogrammetry
and Remote Sensing LAS 1.0 format. The header file for each dataset is complete as
define by the LAS 1.0 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 3 = Water The datasets were delivered
in the Districts standard 5000' by 5000' tiling scheme. The tiles are contiguous and
do not overlap. The tiles are suitable for seamless topographic data mosaics that
include no "no data" areas. The names of the tiles are left padded with zeros as required
to achieve a five character length and all files utilize the LAS file extension. The
South Peace LiDAR Survey was filtered and edited using LiDAR profiles, aerial imagery,
and stereo pairs that were created from LiDAR intensity images. The South Peace LiDAR
datasets have gone through extensive QC procedures by 3001 and the Southwest Florida
Water Management District. During the QC, 3001 used the following principals to guide
their filtering, editing, and QC decisions: All of the data sets were reviewed and
the breaklines were created using stereo pairs that were generated from the GeoCue
LiDARgrammetry software. In addition, imagery was used during the editing / and breakline
creation processes and during the final review of the data sets. If the imagery and
the LiDAR did not agree, 3001 used the LiDAR profiles as a guide in areas where the
profiles were adequate. In areas where the point density was not sufficient enough
to use as a guide, 3001 relied on the imagery and created obstruction polygons. If
an area changed between the Imagery acquisition and the LiDAR acquisition, 3001 followed
the LiDAR as a guide. 3001 used the LiDAR and the imagery to create breaklines. In
some instances, the breaklines do not reflect the imagery due to a significant amount
of rain during acquisition. The following paragraph is from the South Peace metadata.
"There was significant rain fall during the acquisition of the South Peace LiDAR survey.
According to the gage at the USGS 02295637 Peace River at Zolfo Springs Florida, the
gage height went from approximately 14.3 feet to 17.3 feet between February 28, 2005
and March 2, 2005. Between March 2, 2005 and March 4, 2005 the gage fell to about
15.1 feet. The changes in the channel are evident in the breaklines. In some areas
there are sudden changes in the size of the channel as well as the elevation of the
breaklines. Due to the inconsistencies in the channel we have created obscured polygons
around the affected channels." In areas of dense vegetation the bare-earth surface
may appear rough in nature. This is due to the scarcity of points in the area or the
uneven nature of the ground. Quality Control Procedures were performed by different
people and using different methods during the project. Due to this, there may be different
interpretations of the bare-earth surface in areas of dense vegetation. The main difference
in the surfaces is the amount of points that each editor removed from the profile
to represent the ground. This does not mean that either editor was incorrect in their
calculations; it means that some editors were able to describe the surface with less
points. The process date for this step is 2005/2006. The process date for Carter Creek
for this step is 20060921.
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2008-01-25T00:00:00 |
The NOAA Coastal Services Center (CSC) received the files in LAS format.
The files contained Lidar intensity and elevation measurements. The data was in Florida
State Plane Projection and NAVD88 vertical datum. CSC performed the following processing
to the data to make it available within the LDART Retrieval Tool (LDART): 1. The data
were converted from Florida State Plane West coordinates to geographic coordinates.
2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid)
heights using Geoid 99. 3. The LAS data were sorted by latitude and the headers were
updated.
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2009-07-14T00:00:00 |
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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