50160
2009 PSLC-USGS Topographic LiDAR: Wenatchee
wa2009_pslc_usgs_wenatchee_m2604_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2013-12-02
Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data of the
Wenatchee USGS area of interest (AOI) east of Wenatchee, WA on May 1nd - May 28th, 2009.
The total area of delivered LiDAR is 278,232 acres. The requested area was
expanded to include a 100 m buffer to ensure complete coverage and adequate point
densities around survey area boundaries.
Provide high resolution terrain elevation and land cover elevation data.
10804
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2604/supplemental/wa2009_pslc_usgs_wenatchee.KMZ
Reports explaining collection and quality assurance is available at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2604/supplemental/wa2009_pslc_usgs_wenatchee.pdf
Theme
ISO 19115 Topic Category
elevation
Theme
LAZ
Office for Coastal Management
Charleston
SC
Data Set
As Needed
las
LiDAR points in LAZ format (ASPRS Classes 1,2)
none
Any conclusions drawn from the analysis of this information are not the responsibility
of Watershed Sciences, PSLC, NOAA, the Office for Coastal Management or its partners.
Please credit the Puget Sound LiDAR Consortium (PSLC) for these data. The PSLC is supported by the Puget Sound Regional Council,
the National Aeronautical and Space Administration (NASA), the United States Geological Survey (USGS) and numerous partners
in local, state, and tribal government.
Data Steward
2013-12-02
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2013-12-02
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2013-12-02
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2013-12-02
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-120.39181305
-119.94001428
47.87943523
47.4351492
Yes
Unclassified
This data can be obtained on-line at the following URL:
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2604
;
None
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. These data depict the heights at the time of the survey and are only accurate for that time.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2604
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2604/index.html
Bulk Download
Simple download of data files.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2604/supplemental/wa2009_pslc_usgs_wenatchee.KMZ
Browse Graphic
Browse Graphic
kmz
This graphic shows the lidar coverage of Chelan and Douglas counties, Washington area collected in 2009.
https://coast.noaa.gov
Online Resource
https://coast.noaa.gov/dataviewer
Online Resource
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
Elevations are recorded in floating-point meters and the vertical datum is ellipsoidal (GEOID03).
Horizontal positional accuracy for LiDAR is dependent upon the quality of
the GPS/INS solution, sensor calibration and ground conditions at the time of data capture.
The standard system results for horizontal accuracy are less than 1 meter. Not reported, assumed as 1.0 m.
; Quantitative Value: 1.0 meters, Test that produced the value: See LiDAR data report.
Review the report cited as supplemental information above for details on accuracy assessment.; Quantitative Value: 0.036 meters, Test that produced the value:
Summary statistics for point resolution and
accuracy (relative and absolute) of the LiDAR data collected in the Douglas County
survey area are presented below in terms of central tendency, variation around
the mean, and the spatial distribution of the data (for point resolution by bin).
Calculated to 0.12 ft at 1-sigma.
LiDAR data has been collected and processed for all areas within the project study area.
The vertical accuracy of the LiDAR data is described as the mean and standard deviation
(1 sigma) of divergence of LiDAR point coordinates from RTK ground survey point
coordinates. To provide a sense of the model predictive power of the dataset, the root mean
square error (RMSE) for vertical accuracy is also provided. These statistics assume the error
distributions for x, y, and z are normally distributed, thus we also consider the skew and
kurtosis of distributions when evaluating error statistics.
Statements of statistical accuracy apply to fixed terrestrial surfaces only and may not be
applied to areas of dense vegetation or steep terrain. To calibrate laser accuracy for the
LiDAR dataset, 4930 RTK ground survey points were collected on fixed, hard-packed road
surfaces within the survey area.
1
Acquisition.
The lidar survey uses a Leica ALS50 Phase II laser system. For the Wenatchee USGS survey
area, the sensor scan angle +/- 14 degrees from nadir with a pulse rate designed to yield an
average native density (number of pulses emitted by the laser system) of more than 8 points
per square meter over terrestrial surfaces. All survey areas were surveyed with an opposing
flight line side-lap of more than 50% (less than 100% overlap) to reduce laser shadowing and
increase surface laser painting. The Leica ALS50 Phase II system allows up to four range
measurements (returns) per pulse, and all discernible laser returns were processed for the
output dataset. It is not uncommon for some types of surfaces (e.g. dense vegetation or water)
to return fewer pulses than the laser originally emitted. These discrepancies between 'native'
and 'delivered' density will vary depending on terrain, land cover and the prevalence of water
bodies.
To accurately solve for laser points position (geographic coordinates x, y, z) the positional
coordinates of the airborne sensor and the attitude of the aircraft were recorded continuously
throughout the lidar data collection mission. Aircraft position was measured twice per
second (2 Hz) by an onboard differential GPS unit. Aircraft attitude was measured 200 times
per second (200 Hz) as pitch, roll, yaw (heading) from an onboard inertial measurement unit(IMU).
To allow for post-processing correction and calibration, aircraft/sensor position and attitude
data are indexed by GPS time.
2009-05-01T00:00:00
2
Resolved kinematic corrections for aircraft position data using kinematic aircraft GPS and
static ground GPS data.
Software - Waypoint GPS v.8.10, Trimble Geomatics Office v.1.62
Developed a smoothed best estimate of trajectory (SBET) file that blends post-processed
aircraft position with attitude data Sensor head position and attitude were calculated
throughout the survey. The SBET data were used extensively for laser point processing.
Software - IPAS v.1.4
Calculated laser point position by associating SBET position to each laser point return
time, scan angle, intensity, etc. Created raw laser point cloud data for the entire survey
in *.las(ASPRS v1.1) format.
Software: ALS Post Processing Software v.2.69
Imported raw laser points into manageable blocks (less than 500 MB) to perform manual
relative accuracy calibration and filter for pits/birds. Ground points were then classified for
individual flight lines (to be used for relative accuracy testing and calibration).
Software - TerraScan v.9.001
Using ground classified points per each flight line, the relative accuracy was tested.
Automated line-to-line calibrations were then performed for system attitude parameters
(pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calibrations were performed on
ground classified points from paired flight lines. Every flight line was used for relative
accuracy calibration.
Software - TerraMatch v.9.001
Position and attitude data were imported. Resulting data were classified as ground and nonground
points. Statistical absolute accuracy was assessed via direct comparisons of ground
classified points to ground RTK survey data. Data were then converted to orthometric
elevations (NAVD88) by applying a Geoid03 correction. Ground models were created as a
triangulated surface and exported as ArcInfo ASCII grids at a 3-foot pixel resolution.
Software - TerraScan v.9.001, ArcMap v.9.3, TerraModeler v.9.001
2009-09-24T00:00:00
3
The NOAA Office for Coastal Management (OCM) downloaded topographic files in LAZ format from PSLC's website.
The files contained lidar easting, northing, elevation, intensity, return number, class, scan angle
and GPS time measurements; the data was received in state plane Washington (in feet) and vertical coordinates were
referenced to NAVD88 in feet using the Geoid03 model.
OCM performed the following processing for data storage and Digital Coast provisioning purposes:
1. The All-Return LAZ files were checked for bad elevations
2. The laz files were converted from a Projected Coordinate System (SP 4602) to a Geographic Coordinate system (NAD83)
3. The laz files were then converted to ellipsoidal vertical units in meters using the geoid03 conversion.
2013-12-02T00:00:00
gov.noaa.nmfs.inport:50160
Anne Ball
2017-11-15T15:24:38
SysAdmin InPortAdmin
2022-08-09T17:11:38
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16