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Short Citation:
OCM Partners, 2023: 2015 OLC Lidar DEM: Wasco, WA,

Item Identification

Title: 2015 OLC Lidar DEM: Wasco, WA
Short Name: wa2015_olc_wasco_DEM_m6342_metadata
Status: Completed
Publication Date: 2017-08-15

WSI collected Light Detection and Ranging (LiDAR) data for the Oregon LiDAR Consortium (OLC) Wasco County, WA, study area. The Oregon LiDAR Consortium's Wasco County 2014-2015 project area of interest (AOI) encompasses 1,020,680 acres. The collection of high resolution geographic data is part of an ongoing pursuit to amass a library of information accessible to government agencies as well as the general public. Settings for LiDAR data capture produced an average resolution of at least eight pulses per square meter. Collections for the six deliveries were done from July 15, 2014 - August 5, 2015.

Final products created include RGB extracted (from NAIP imagery) LiDAR point cloud data, three-foot digital elevation models of highest hit and bare earth ground models, one-meter density rasters, 1.5-foot intensity rasters, study area vector shapes, and corresponding statistical data. All final deliverables were projected to Washington State Plane South, using the NAD83(2011) horizontal datum and the NAVD88 (Geoid 12A) vertical datum, with units in US Survey Feet. NOAA OCM changed the vertical units to meters for ingest into the Digital Coast. This metadata was created for the bare earth digital elevation models.

Original contact information:

Contact Name: Jacob Edwards

Contact Org: DOGAMI

Phone: 971-673-1557



Provide high resolution terrain elevation data.



Supplemental Information:

Final reports for each delivery may be viewed at:


Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
Global Change Master Directory (GCMD) Science Keywords
ISO 19115 Topic Category
None Bare earth
None Bare ground
None DEM
None High-resolution
None Light Detection and Ranging

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords

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
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of the Oregon Department of Geology and Mineral Industries (DOGAMI), FEMA, the Office for Coastal Management or its partners.

Data Set Credit: DOGAMI

Support Roles

Data Steward

CC ID: 664845
Date Effective From: 2017-08-15
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: 664847
Date Effective From: 2017-08-15
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: 664848
Date Effective From: 2017-08-15
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: 664846
Date Effective From: 2017-08-15
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: 1150919
W° Bound: -123.427248
E° Bound: -122.03767
N° Bound: 49.26863
S° Bound: 45.61233

Extent Group 1 / Time Frame 1

CC ID: 1150918
Time Frame Type: Range
Start: 2014-07-15
End: 2015-08-05

Spatial Information

Spatial Representation

Representations Used

Grid: 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


Distribution Information

Distribution 1

CC ID: 721081
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: 721082
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 721084
URL Type:
Online Resource


CC ID: 721085
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 664871
Activity Date/Time: 2017-08-09

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 664870
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: 718796
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 721083
Activity Date/Time: 2018-02-13

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:


Vertical Positional Accuracy:

Vertical Accuracy reporting is designed to meet guidelines presented in the National Standard for Spatial Data Accuracy (NSSDA) (FGDC, 1998) and the ASPRS Guidelines for Vertical Accuracy Reporting for LiDAR Data V1.0 (ASPRS, 2004). The statistical model compares known ground survey points (GSPs) to the closest laser point. Vertical accuracy statistical analysis uses ground survey points in open areas where the LiDAR system has a "very high probability" that the sensor will measure the ground surface and reports the fundamental vertical accuracy value (FVA=1.96*RMSE).

For the OLC Wasco study area, a total of 15,430 GSPs were collected. No additional ground survey points were collected for independent verification.

For more information about the vertical accuracy, please refer to the delivery reports, listed above in the Supplemental_Information field

of this metadata record.

; Quantitative Value: 0.06 meters, Test that produced the value: Compiled to meet fundamental vertical accuracy value (FVA=1.96*RMSE) in meters.

Completeness Report:

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

Conceptual Consistency:

Upon receipt from vendor (WSI), all LiDAR data was independently reviewed by staff from the Oregon Department of Geology and Mineral Industries (DOGAMI) to ensure project specifications were met. All data were inventoried for completeness and data were checked for quality, which included examining LiDAR data for errors associated with internal data consistency, model quality, and accuracy.


Process Steps

Process Step 1

CC ID: 1150915

The LiDAR survey occurred between July 15, 2014 and August 5, 2015 utilizing a Leica ALS70 sensor mounted in a Cessna Grand Caravan. The system was programmed to emit single pulses at a rate of 198 kilohertz and flown around 1,400 meters above ground level (AGL), capturing a scan angle of +/-15 degrees from nadir (field of view equal to 30 degrees).

These settings were developed to yield points with an average native density of greater than eight pulses per square meter over terrestrial surfaces. The study area was surveyed with opposing flight line side-lap of greater than 60 percent with at least 100 percent overlap to reduce laser shadowing and increase surface laser painting. The system allows up to four range measurements per pulse, and all discernible laser returns were processed for the output dataset. To solve for laser point position, an accurate description of aircraft position and attitude is vital. Aircraft position is described as x, y, and z and was measured twice per second (two hertz) by an onboard differential GPS unit. Aircraft attitude is described as pitch, roll, and yaw (heading) and was measured 200 times per second (200 hertz) from an onboard inertial measurement unit (IMU).

Process Date/Time: 2015-01-01 00:00:00

Process Step 2

CC ID: 1150916

The NOAA Office for Coastal Management (OCM) received the files in the proprietary ESRI grid format. The files were converted to floating point GeoTIFF format using gdal_translate from GDAL version 2.1.1. Vertical units were changed to meters in that process.

Process Date/Time: 2017-07-01 00:00:00

Catalog Details

Catalog Item ID: 49473
GUID: gov.noaa.nmfs.inport:49473
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:13+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