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OCM Partners, 2023: 2012 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Upper Naches River, Washington,

Item Identification

Title: 2012 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Upper Naches River, Washington
Short Name: wa2012_pslc_uppernaches_m2511_metadata
Status: Completed
Publication Date: 2013-06

Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data of the Upper Naches River Valley and Nile Slide area of interest on

September 30th, 2011-October 1st, 2011 and April 5th, 2012 for the Puget Sound LiDAR Consortium. The valley bottom was reflown in 2012 during "leaf-off"

conditions, to ensure a more detailed bare earth model, and matched with the upslope data from 2011 to provide a seamless dataset. The requested area was

expanded to include a 100m buffer to ensure complete coverage and adequate point densities around survey area boundaries. The total acreage of this

delivery is 23,771 acres of LiDAR data.

The LiDAR survey utilized a Leica ALS60 sensor in a Cessna Caravan 208B. Please see "Project Report" below for specific

information regarding the airborne survey and ground survey.

This Lidar survey acheived a nominal point spacing of 11.60 points per square meter.


The LAS files can be used to create DEMs and also to extract topographic data in software that does not support raster data. Other surface features

can also be extracted with custom applications. LiDAR data has a wide range of uses such as earthquake hazard studies, hydrologic modeling, forestry,

coastal engineering, roadway and pipeline engineering, flood plain mapping, wetland studies, geologic studies and a variety of analytical and

cartographic projects.



Supplemental Information:

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

A Lidar Report from the vendor for this data set may be viewed here:


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

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Watershed Sciences Inc., 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: 692975
Date Effective From: 2013-06
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: 692977
Date Effective From: 2013-06
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: 692978
Date Effective From: 2013-06
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: 692976
Date Effective From: 2013-06
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: 1134060
W° Bound: -121.112599
E° Bound: -120.902381
N° Bound: 46.963177
S° Bound: 46.79458

Extent Group 1 / Time Frame 1

CC ID: 1134059
Time Frame Type: Discrete
Start: 2012-04-05

Extent Group 1 / Time Frame 2

CC ID: 1134057
Time Frame Type: Discrete
Start: 2011-09-30

Extent Group 1 / Time Frame 3

CC ID: 1134058
Time Frame Type: Discrete
Start: 2011-10-01

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: 743426
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: 743427
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 743429
URL Type:
Online Resource


CC ID: 743430
URL Type:
Online Resource


CC ID: 743431
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for sections of Yakima and Kittitas Counties, Washington.

Activity Log

Activity Log 1

CC ID: 692996
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 692995
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: 718774
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743428
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). There are no other attribute tables.

Horizontal Positional Accuracy:

Not applicable for pure elevation data: every XY error has an associated Z error.

Vertical Positional Accuracy:

See the "Project Report" above for a detailed accuracy report.; Quantitative Value: 0.0236 meters, Test that produced the value:

Root mean square Z error in open, near-horizontal areas, as specified by contract. Units in meters. Accuracy may be significantly less in steep

areas and under heavy forest canopy.

Completeness Report:

Elevation data has been collected for all areas inside project boundaries. The data set was flown with a 60% sidelap between flightlines and a 100

meter buffer to ensure all areas are properly sampled.

Conceptual Consistency:

Puget Sound Lidar Consortium evaluates logical consistency of high-resolution lidar elevation data with three tests: examination of file names,

file formats, and mean and extreme values within each file; internal consistency of measured Z values in areas where survey swaths overlap;

and visual inspection of shaded-relief images calculated from bare-earth models.

File names, formats, and values: All file naming convention and file formats are checked for consistency.

Visual inspection of bare earth surfaces were examined to find any obvious data errors such as blunders, border artifacts, gaps between data quads,

no-data gaps between flight lines, hillscarps, land shifting due to GPS time errors, etc.


Process Steps

Process Step 1

CC ID: 1134054

1. Resolved kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data.

Software: Waypoint GPS v.8.10, Trimble Business Center v.2.6

2. 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 TC v.3.1

3. 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 v. 1.2) format. Data were then converted to orthometric elevations (NAVD88) by applying

a Geoid03 correction.

Software: ALS Post Processing Software v.2.74

4. 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.12.004

5. 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.12.001

6. Position and attitude data were imported. Resulting data were classified as ground and non-ground points. Statistical absolute accuracy was assessed

via direct comparisons of ground classified points to ground RTK survey data.

Software: TerraScan v.12.004, TerraModeler v.12.002

7. Final version of data was checked for duplicate points using TerraScan software. No duplicate points were found.

Software: TerraScan v.12.004, TerraModeler v.12.002

8. Bare Earth models were created as a triangulated surface and exported as ArcInfo ASCII grids at a 3-foot pixel resolution. Highest Hit models were

created for any class at 3-foot grid spacing and exported as ArcInfo ASCII grids.

Software: TerraScan v.12.004, ArcMap v. 10.0, TerraModeler v.12.002

Process Date/Time: 2011-01-01 00:00:00

Process Step 2

CC ID: 1134055

The NOAA Office for Coastal Management (OCM) downloaded topographic files in .LAZ format from PSLC's website. The files contained lidar elevation and

intensity 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 topographic laz files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03.

2. The topographic laz files were converted from a Projected Coordinate System (WA SP South) to a Geographic Coordinate system (NAD83).

3. The topographic laz files' vertical units were converted from feet to meters.

4. The topographic laz files' horizontal units were converted from feet to decimal degrees.

Process Date/Time: 2013-06-01 00:00:00

Catalog Details

Catalog Item ID: 50169
GUID: gov.noaa.nmfs.inport:50169
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