2015 OLC Lidar DEM: Wasco, WA

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

Email: jacob.edwards@oregon.gov

Provide high resolution terrain elevation data.

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Final reports for each delivery may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6341/supplemental/

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.

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer

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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.

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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.

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

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.