2017 - 2018 USGS QL1 Lidar DEM: WA 3 County eng Dataset EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) elevation CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON VERTICAL LOCATION > LAND SURFACE LIDAR > Light Detection and Ranging Airplane > Airplane Product: These are Digital Elevation Model (DEM) data for QL1 portion of the WA 3 County LiDAR 2017 lidar project. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create a 3 foot hydro-flattened Raster DEM. Geographic Extent: This dataset and derived products encompass an area covering approximately 1513 square miles. The area includes Columbia, Garfield, and Walla Walla counties in south eastern Washington. Dataset Description: RAW flight line swaths were processed to create classified LAS 1.4 files delineated in 3000 ft x 3000 ft tiles. Each LAS file contains LiDAR point information, which has been calibrated, controlled, and classified. Additional derived products include intensity images, highest hit surface models, and 3D breaklines of rivers and lakes within the study area. Ground Control Points were acquired and calibrated by Quantum Spatial, Inc. Data acquisition was coordinated by Quantum Spatial and all lidar data calibration, and follow-on processing were completed by Quantum Spatial, Inc. Ground Conditions: Acquisition below aircraft free of smoke, fog and cloud cover. A small area with remaining snow on the ground was noticed in the data. The difference was only noticed due to the area being acquired at two different times. The high snow level was classified to class 21 and the overlapping mission acquired without snow on the ground was used for ground model creation. A shape of this area has been provided. This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the GeoTIFF files hosted by USGS on Amazon Web Services. OCM Partners OCM Partners https://www.fisheries.noaa.gov/inport/item/79039 https://www.fisheries.noaa.gov/inport/item/49404 https://www.fisheries.noaa.gov/inport/item/79019 northlimit=46.71; eastlimit=-117.2; southlimit=46; westlimit=-119.49; start=2017-11-10; end=2018-07-04; https://creativecommons.org/publicdomain/zero/1.0/ To the extent possible under law, the U.S. Government has waived all copyright and related or neighboring rights to this dataset. None 2019