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Short Citation:
OCM Partners, 2023: 2015 Puget Sound LiDAR Consortium (PSLC) LiDAR: WA DNR Lands (P1),

Item Identification

Title: 2015 Puget Sound LiDAR Consortium (PSLC) LiDAR: WA DNR Lands (P1)
Short Name: wa2015_pslc_wadnr_p1_m4989_metadata
Status: Completed
Publication Date: 2016-04-13

In June 2014, WSI, a Quantum Spatial Inc. (QSI) company, was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR) data for the Washington Department of Natural Resources (WA DNR) Lands in western Washington. Data were collected to aid the WA DNR in assessing the topographric and geophysical properties of the study area. Acquisition of the three separate areas were completed between December 2014 and March 2015, each area was delivered and will be available separately.


Provide high resolution surface elevation data from the Washington Department Natural Resources lands.



Supplemental Information:

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

The final report for this project can be viewed 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: None Planned
Data Presentation Form: las
Entity Attribute Overview:

LiDAR points in LAZ format (ASPRS Classes 1,2,7,12)

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Quantum Spatial, PSLC, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 693693
Date Effective From: 2016-04-13
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: 693695
Date Effective From: 2016-04-13
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: 693696
Date Effective From: 2016-04-13
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: 693694
Date Effective From: 2016-04-13
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: 1137513
W° Bound: -124.65756
E° Bound: -123.71697
N° Bound: 48.32666
S° Bound: 47.93683

Extent Group 1 / Time Frame 1

CC ID: 1137512
Time Frame Type: Range
Start: 2014-12-31
End: 2015-03-06

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: 743530
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: 743531
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 743533
URL Type:
Online Resource


CC ID: 743534
URL Type:
Online Resource


CC ID: 743535
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for the WA DNR P1 lands.

Activity Log

Activity Log 1

CC ID: 693712
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 693711
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: 718798
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743532
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality


All discernible laser returns were processed for the output dataset. The discrepancy between native and delivered density will vary depending on terrain, land cover, and the prevalence of water bodies.

Horizontal Positional Accuracy:

Ground survey points were collected using real time kinematic (RTK) and post-processed kinematic (PPK) survey techniques. A Trimble R7 base unit was positioned at a nearby monument to broadcast a kinematic correction to a roving Trimble R8 GNSS receiver. All GSP measurements were made during periods with a Position Dilution of Precision (PDOP) of less than 3.0 with at least six satellites in view of the stationary and roving receivers. When collecting RTK and PPK data, the rover records data while stationary for five seconds, then calculates the pseudorange position using at least three one-second epochs.; Quantitative Value: 0.02 meters, Test that produced the value: Relative errors for the position must be less than 1.5 cm horizontal and 2.0 cm vertical in order to be accepted.

Vertical Positional Accuracy:

The Root Mean Square Error (RMSE) of the vertical accuracy of P1 is 0.272 ft (0.083 m). Please see the LiDAR data report for a discussion of the statistics related to this dataset.; Quantitative Value: 0.083 meters, Test that produced the value: 280 ground check points were withheld from the calibration and post-processing of the LiDAR.

Completeness Report:

LiDAR data has been collected and processed for all areas within the P1 land area.

Conceptual Consistency:

All areas were surveyed with an opposing flight line side-lap of equal to or more than 60 percent (equal to or more than 100 percent overlap) in order to reduce laser shadowing and increase surface laser painting. To accurately solve for laser point position (geographic coordinates x, y and z), the positional coordinates of the airborne sensor and the attitude of the aircraft were recorded continuously throughout the LiDAR data collection mission. Position of the aircraft was measured twice per second (2 Hz) by an onboard differential GPS unit, and aircraft attitude was measured 200 times per second (200 Hz) as pitch, roll and yaw (heading) from an onboard inertial measurement unit (IMU). To allow for post-processing correction and calibration, aircraft and sensor position and attitude data are indexed by GPS time.


Process Steps

Process Step 1

CC ID: 1137508

The LiDAR survey was accomplished using a Leica ALS70 and a Leica ALS80 system mounted in a Cessna Grand Caravan. Table 5 summarizes the settings used to yield an average pulse density of 8 pulses/m^2 over the WA DNR Lands project area; figure 5 shows acquisition flightlines. The Leica ALS70 and ALS80 systems can record unlimited measurements (returns) per pulse, but typically do not record more than five returns per pulse. It is not uncommon for some types of surfaces (e.g., dense vegetation or water) to return fewer pulses to the LiDAR sensor than the laser originally emitted. The discrepancy between first return and overall delivered density will vary depending on terrain, land cover, and the prevalence of water bodies. All discernible laser returns were processed for the output dataset.

Process Date/Time: 2014-12-31 00:00:00

Process Step 2

CC ID: 1137509

1. Resolve kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data. Develop a smoothed best estimate of trajectory (SBET) file that blends post-processed aircraft position with sensor head position and attitude recorded throughout the survey.

2. Calculate laser point position by associating SBET position to each laser point return time, scan angle, intensity, etc. Create raw laser point cloud data for the entire survey in *.las (ASPRS v. 1.2) format. Convert data to orthometric elevations by applying a geoid correction.

3. Import raw laser points into manageable blocks (less than 500 MB) to perform manual relative accuracy calibration and filter erroneous points. Classify ground points for individual flight lines.

4. Using ground classified points per each flight line, test the relative accuracy. Perform automated line-to-line calibrations for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calculate calibrations on ground classified points from paired flight lines and apply results to all points in a flight line. Use every flight line for relative accuracy calibration.

5. Classify resulting data to ground and other client designated ASPRS classifications (Table Assess statistical absolute accuracy via direct comparisons of ground classified points to ground control survey data.

6. Generate bare earth models as triangulated surfaces. Generate highest hit models as a surface expression of all classified points. Export all surface models as ESRI GRIDs in EDRAS Imagine (.img) format at a 1 meter pixel resolution.

7. Correct intensity values for variability and export intensity images as GeoTIFFs at a 0.5-meter pixel resolution.

Process Date/Time: 2014-06-01 00:00:00

Process Step 3

CC ID: 1137510

The NOAA Office for Coastal Management (OCM) downloaded topographic files in .laz format from PSLC. The files contained lidar elevation, intensity, return number, class, scan angle and GPS time measurements. The data were received in Washington State Plane South Zone 4602, NAD83 coordinates and were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of the data were feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03, and from feet to meters.

2. The las files were converted from a Projected Coordinate System (WA SP South) to a Geographic Coordinate system (NAD83), converting from feet to decimal degrees.

3. Erroneous points were removed and class 11 points were reclassified to class 12 (overlap) to hold to the NOAA OCM classification scheme.

4. Filenames were altered with the addition of which WA DNR Land the tile resides. At the moment of publication of this metadata, P3 is not available publicly and therefore will not be available with this Digital Coast project.

Process Date/Time: 2016-03-05 00:00:00

Catalog Details

Catalog Item ID: 50187
GUID: gov.noaa.nmfs.inport:50187
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