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Short Citation:
OCM Partners, 2024: 2008 USFS Lidar: Sherman Pass, Colville NF, WA, https://www.fisheries.noaa.gov/inport/item/69263.

Item Identification

Title: 2008 USFS Lidar: Sherman Pass, Colville NF, WA
Short Name: 2008 usfs colville m9753
Status: Completed
Creation Date: 2008-11-05
Publication Date: 2023-02-09
Abstract:

Light Detection and Ranging data (lidar) of the Colville National Forest Study Area. The requested lidar area of interest (AOI) totals approximately 160 square miles, or 102,243 acres. This area was buffered by 100 meters to ensure data coverage, resulting in a total area flown (TAF) of 105,074 acres.

Purpose:

Provide a lidar point cloud for forestry management.

Notes:

This metadata was created years after the data collection based upon the available project report from the lidar contractor.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
ISO 19115 Topic Category
elevation

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON

Instrument Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Instrument Keywords
LIDAR > Light Detection and Ranging

Platform Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Platform Keywords
Airplane > Airplane

Physical Location

Organization: Office for Coastal Management

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Elevation
Maintenance Frequency: As Needed
Data Presentation Form: Model (digital)
Entity Attribute Overview:

LAS format data with attributes of x, y, z, intensity, seconds of gps week,

Entity Attribute Detail URL: https://www.asprs.org/wp-content/uploads/2010/12/asprs_las_format_v11.pdf

Support Roles

Data Steward

CC ID: 1218132
Date Effective From: 2023-02-09
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 1218131
Date Effective From: 2023-02-09
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413
URL: https://www.coast.noaa.gov/

Metadata Contact

CC ID: 1218150
Date Effective From: 2023-02-09
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Extent Group 1

Extent Description:

Colville National Forest Study Area

Extent Group 1 / Geographic Area 1

CC ID: 1218134
W° Bound: -118.6703
E° Bound: -118.112
N° Bound: 48.7066
S° Bound: 48.5114

Extent Group 1 / Time Frame 1

CC ID: 1218135
Time Frame Type: Range
Start: 2008-06-15
End: 2008-06-24
Description:

Initial collection

Extent Group 1 / Time Frame 2

CC ID: 1218136
Time Frame Type: Discrete
Start: 2008-09-05
Description:

collection to fill gaps

Spatial Information

Spatial Resolution

Horizontal Distance: 0.35 Meter

Spatial Representation

Representations Used

Vector: Yes

Vector Representation 1

CC ID: 1218138
Point Object Present?: Yes
Point Object Count: 3767993261

Reference Systems

Reference System 1

CC ID: 1218140

Coordinate Reference System

CRS Type: Geographic 3D
EPSG Code: EPSG:4957
EPSG Name: NAD83(HARN)
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

None

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 1218142
Start Date: 2023-02-09
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9753
Distributor: Office for Coastal Management (OCM) (2023-02-09 - Present)
Description:

Custom download allowing user selection of area, projection, format, etc.

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 1218143
Start Date: 2023-02-09
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9753/index.html
Distributor: Office for Coastal Management (OCM) (2023-02-09 - Present)
Description:

Bulk download of files. These are in orthometric NAVD88 vertical datum.

File Type (Deprecated): LAZ
Distribution Format: LAS/LAZ - LASer
Compression: Zip

URLs

URL 1

CC ID: 1218144
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9753/supplemental/Colville_Data_Report_2008.pdf
Name: Colville Data Report
URL Type:
Online Resource
File Resource Format: pdf
Description:

Data report from the contractor. Represents the data as delivered to USFS. Modifications have occurred to the data, as noted in this metadata.

Data Quality

Vertical Positional Accuracy:

absolute accuracy RMSE = 0.08 feet (0.024 meters)

standard deviation = 0.13 feet (0.04 meters)

Note: These are the values from the data report. RMSE less than standard deviation does not make mathematical sense! Relative accuracy from examining overlapping flightlines has a standard deviation of 0.29 feet (0.09 meters). Given these inconsistencies, the true absolute accuracy is unclear and it may be safer to use a value on the order of 0.10 meters.

Lineage

Sources

Classified point cloud

CC ID: 1218149
Contact Role Type: Originator
Contact Type: Organization
Contact Name: USFS

Process Steps

Process Step 1

CC ID: 1218146
Description:

The LiDAR survey utilized a Leica ALS50 Phase II sensor mounted in a Cessna Caravan 208B. The Leica ALS50 Phase II system was set to acquire greater than 105,000 laser pulses per second (i.e. 105 kHz pulse rate) and flown at 900 meters above ground level (AGL), capturing a scan angle of ±14 degrees from nadir (see Table 2.1). These settings are developed to yield points with an average native pulse density of 8 points per square meter over terrestrial surfaces. 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 vary according to distributions of terrain, land cover, and water bodies.

The study area was surveyed with opposing flight line side-lap of at least 50% (100% overlap) to reduce laser shadowing and increase surface laser painting. The system allows up to four range measurements per pulse, and all discernable laser returns were processed for the output dataset.

Process Date/Time: 2008-09-05 00:00:00

Process Step 2

CC ID: 1218147
Description:

Point cloud data were classified for ground points by Watershed Sciences. Ground points were given a point class of two (2) as specified by the LAS 1.1 format. Unclassified points were given a class of one (1).

Process Step 3

CC ID: 1218148
Description:

Classified point clouds were received by NOAA from US Forest Service in Washington State Plane North NAD83(HARN), NAVD88/Geoid03. For ingest into the Digital Coast Data Access Viewer, the data were converted to geographic coordinates and the geoid model was removed.

Process Date/Time: 2023-02-09 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov
Source: Classified point cloud

Catalog Details

Catalog Item ID: 69263
GUID: gov.noaa.nmfs.inport:69263
Metadata Record Created By: Kirk Waters
Metadata Record Created: 2023-02-09 19:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-10-17 16:12+0000
Metadata Record Published: 2023-02-09
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2023-02-09
Metadata Review Frequency: 3 Years
Metadata Next Review Date: 2026-02-09