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Short Citation:
OCM Partners, 2024: 2006 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Eastern Washington and River Corridors,

Item Identification

Title: 2006 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Eastern Washington and River Corridors
Short Name: wa2006_pslc_rivercorridors_m2596_metadata
Status: Completed
Publication Date: 2013-11-20

Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data in eastern Washington,

eastern Oregon, and southern Canada in October and November, 2006 for the Puget Sound LiDAR Consortium.

The survey areas cover portions of the lower Okanogan River in Washington, the Methow River in

Washington, Lake Roosevelt in Washington, the Wenatchee River in Washington, and the John Day

River in Oregon. The upper Okanogan River area, in Canada, was excluded from this project the data

does not lie in borders of the United States.

The total delivered acreage for the study areas shown above is >26,000 acres greater than the original

amount, due to buffering of the original study areas and flight planning optimization.

Collection dates for the project areas:

----- Lower Okanogan (WA) 20060506 ----- Methow (WA) 20061108-20061109 -----

Lake Roosevelt (WA) 20061016-20061020 & 20061029-20061101 ----- John Day River (OR)

20061005-20061007 ----- Wenatchee (WA) 20061012-20061013 & 20061025-20061028 -----


Provide high resolution terrain elevation and land cover elevation data.



Supplemental Information:

A footprint of this data set may be viewed in Google Earth at:

Reports explaining collection and quality assurance is available at:


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
None LAZ

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Entity Attribute Overview:

LiDAR points in LAZ format (ASPRS Classes 1,2)

Entity Attribute Detail Citation:


Distribution Liability:

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.

Data Set Credit: 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.

Support Roles

Data Steward

CC ID: 692431
Date Effective From: 2013-11-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 692433
Date Effective From: 2013-11-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 692434
Date Effective From: 2013-11-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 692432
Date Effective From: 2013-11-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1134888
W° Bound: -120.9646779
E° Bound: -117.7205329
N° Bound: 48.95706996
S° Bound: 44.43660155

Extent Group 1 / Time Frame 1

CC ID: 1134887
Time Frame Type: Range
Start: 2006-05-06
End: 2006-11-09

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:


Data Access Constraints:


Data Use Constraints:

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.

Distribution Information

Distribution 1

CC ID: 743330
Download URL:
File Name: Customized Download

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 743331
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 743333
URL Type:
Online Resource


CC ID: 743334
URL Type:
Online Resource


CC ID: 743335
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for the areas in the eastern Washington and river corridors

collected in 2006.

Activity Log

Activity Log 1

CC ID: 692455
Activity Date/Time: 2016-10-25

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 692454
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718758
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743332
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality


Elevations are recorded in floating-point meters and the vertical datum is ellipsoidal (GEOID03).

Horizontal Positional Accuracy:

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.

Vertical Positional Accuracy:

LiDAR survey datasets are referenced to 1-Hz static ground GPS data collected over presurveyed

monuments with known coordinates. While surveying, the aircraft collects 2 Hz kinematic

GPS data. The onboard inertial measurement unit (IMU) collects 200 Hz aircraft attitude

data. Waypoint GPS v.7.60 and REALM are used to process the kinematic corrections for the

aircraft. The static and kinematic GPS data are then post-processed after the survey to

obtain an accurate GPS solution and aircraft positions. IPAS v.1.0 and POSPAC are used to

develop a trajectory file that includes corrected aircraft position and attitude information.

The trajectory data for the entire flight survey session are incorporated into a final

smoothed best estimate trajectory (SBET) file that contains accurate and continuous

aircraft positions and attitudes.

RTK GPS measurements were taken throughout all study areas and are compared to LiDAR point data in

each study area. The root mean square error (RMSE) is reported for each study area, along with 1-

and 2-sigma absolute deviation values available in report at:

; Quantitative Value: 0.12 meters, Test that produced the value:

Accuracies averaged to 0.12 m.

2 sigma standard deviations absolute accuracy calculated as 0.16 meters in Lower Okanogan,

0.16 m in the Methow area, 0.09 m in the Lake Roosevelt area, 0.06 m in the Wenatchee

study area and 0.14 m in the John Day study area.

(Upper Okanogan study area accuracy 0.11 m at 2 sigma std dev)

Completeness Report:

LiDAR data has been collected and processed for all areas within the project study area.

Conceptual Consistency:

LiDAR flight lines have been examined to ensure that there was at least 60% sidelap, there are minimal gaps between

flightlines, and overlapping flightlines have consistent elevation values.

Shaded relief images have been visually inspected for data errors such as pits, border artifacts, gaps, and

shifting. The data was examined at a 1:2000 scale.


Process Steps

Process Step 1

CC ID: 1134883


The LiDAR surveys utilized two different laser systems degrees - the Leica ALS50 Phase II and the Optech

3100. Flight parameters were different for each system, resulting in different native pulse

densities (the number of pulses emitted by the LiDAR system from the aircraft).

Some types of surfaces (i.e., dense vegetation or water) may return fewer pulses than the laser

originally emitted. Therefore, the delivered density can be less than the native density and

lightly variable according to distributions of terrain, land cover and water bodies. All study

areas were surveyed with opposing flight line side-lap of =50% (=100% overlap) to reduce laser

shadowing and increase surface laser painting. Both laser systems allow up to four range

measurements per pulse, and all discernable laser returns were processed for the output


Process Step 2

CC ID: 1134884

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 Processor software,

IPAS Pro GPS/INS software, and Waypoint GPS, 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 output as laser points, TINed and GRIDed surfaces

Process Step 3

CC ID: 1134885

The NOAA Office for Coastal Management (OCM) downloaded topographic files in text format from PSLC's website.

The files contained lidar easting, northing, elevation, intensity, return number, class, scan angle

and GPS time measurements. Lake Roosevelt, John Day River and Lower Okanogan data was received in

UTM Zone 10 (in meters); Wenatchee and Methow data were received in UTM Zone 11 (in meters);

all datasets were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of

the data were meters. OCM performed the following processing for data storage and Digital Coast

provisioning purposes:

1. The All-Return ASCII txt files were parsed to LAS files.

2. The All-Return ASCII files were converted from txt format to las format using LASTools' txt2las tool and

reclassified to fit the OCM class list, N=1 (unclassified), G=2 (ground).

3. Bad elevations were removed the las files.

4. The las files were converted from a Projected Coordinate System (UTM Zone 10/11) to a Geographic Coordinate system (NAD83)

Process Date/Time: 2013-11-20 00:00:00

Catalog Details

Catalog Item ID: 50153
GUID: gov.noaa.nmfs.inport:50153
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16