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Metadata Identifier: gov.noaa.csc.maps:2007_OR_ODF_m104
MD_DataIdentification
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2007 Oregon Department of Forestry (ODF) Northwest Oregon Lidar
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This lidar dataset encompasses two areas in northwest Oregon. The northern
area is located in Clatsop County, encompassing Clatsop State Forest ownership; the
southern area is located in Tillamook, Washington and Yamhill Counties, encompassing
areas of the Tillamook State Forest. The LiDAR data was collected April 25-28, May
1 and May 3-9, 2007. The lidar data are multiple return and bare earth classified.
The survey used a Leica ALS50 Pase II laser system mounted in a Cessna Caravan 208.
LiDAR flight lines have been examined to ensure that there was at least 50% sidelap,
there are no gaps between flightlines, and overlapping flightlines have consistent
elevation values. Near nadir scan angles were used to increase penetration of vegetation
to ground surfaces. Ground level GPS and aircraft IMU were collected during the flight.
Elevation values for open water surfaces are not valid elevation values because few
LiDAR points are returned from water surfaces. Watershed Sciences, Inc. collected
the LiDAR and created this data set for the Oregon Department of Forestry and the
Puget Sound LiDAR Consortium.
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SV_Identification
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2007 Oregon Department of Forestry (ODF) Northwest Oregon Lidar |
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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/or/odf/LiDAR_Data_Report_ODF_Delivery1.pdf |
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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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Ian Madin |
Oregon Department of Geology and Mineral Industries (DOGAMI) |
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ian.madin@dogami.state.or.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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Oregon Department of Forestry (ODF) |
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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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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/or/odf/LiDAR_Data_Report_ODF_Delivery1.pdf |
Lidar Final Report |
Report describes Clatsop County data (northern section of these data). |
information |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/or/odf/LiDAR_Data_Report_ODF_Delivery5.pdf |
Lidar Final Report |
Report describes Tillamook, Washington and Yamhill County data (southern section of
these data).
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information |
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ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/or/odf/LiDAR_Data_Report_ODF_Delivery6.pdf |
Lidar Final Report |
Report describes Tillamook, Washington and Yamhill County data (southern section of
these data).
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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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-123.381263 |
-123.244023 |
45.877991 |
45.747008 |
2007-04-25 |
2007-05-09 |
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-123.381263 |
-123.244023 |
45.877991 |
45.747008 |
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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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2007-01-01T00:00:00 |
Acquisition. The LiDAR data was collected April 25-28, May 1, and
May 3-9, 2007. This was a leaf-off condition. A Leica ALS50 LiDAR system was mounted
in a fixed-wing aircraft and flown 900 meters above ground level (AGL). A pulse rate
(PR) of 105 kHz with at least 100% overlap (minimum 50% side-lap) was used. Greater
than 8 points per square meter and near nadir scan angles were used to increase penetration
of vegetation to ground surfaces. Ground level GPS and aircraft IMU were collected
during the flight.
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2007-01-01T00:00:00 |
Processing. 1. Flight lines and data were reviewed to ensure complete
coverage of the study area and positional accuracy of the laser points. 2. Laser point
return coordinates were computed using ALS Post Processing software and IPAS based
on independent data from the LiDAR system, IMU, and aircraft. 3. The raw LiDAR file
was assembled into flight lines per return with each point having an associated x,
y, and z coordinate. 4. Visual inspection of swath to swath laser point consistencies
within the study area were used to perform manual refinements of system alignment.
5. Custom algorithms were designed to evaluate points between adjacent flight lines.
Automated system alignment was computed based upon randomly selected swath to swath
accuracy measurements that consider elevation, slope, and intensities. Specifically,
refinement in the combination of system pitch, roll and yaw offset parameters optimize
internal consistency. 6. Noise (e.g., pits and birds) was filtered using ALS postprocessing
software, based on known elevation ranges and included the removal of any cycle slips.
7. Using TerraScan and Microstation, ground classifications utilized custom settings
appropriate to the study area. 8. The corrected and filtered return points were compared
to the RTK ground survey points collected to verify the vertical and horizontal accuracies.
9. Points were broken into 7.5 minute quads and output as laser points, TINed and
GRIDed surfaces. 10. The highest hit method was used to create a vegetation DEM.
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2008-11-15T00:00:00 |
The NOAA Coastal Services Center (CSC) received the files in las format.
The files contained Lidar elevation and intensity measurements. The data was in Lambert
Conformal Conic and Oregon Lambert projections and NAVD88 Geoid 03 vertical datum.
CSC performed the following processing to the data to make it available within Digital
Coast: 1. The data were converted from Lambert Conformal Conic/Oregon Lambert coordinates
to geographic coordinates. 2. The data were converted from NAVD88 (orthometric) heights
to GRS80 (ellipsoid) heights using Geoid 03. 3. The LAS data were sorted by latitude
and the headers were updated.
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2009-08-21T00:00:00 |
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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