2018 USGS Lidar DEM: Delaware County, OH oh2018_delaware_dem_m13707 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 > OHIO VERTICAL LOCATION > LAND SURFACE LIDAR > Light Detection and Ranging Airplane > Airplane Original Product: 1-meter bare-earth raster digital elevation model (DEM) data tiles in ERDAS IMG format. Original Dataset Geographic Extent: Covers approximately 439 square miles across Delaware County. Original Dataset Description: The OH Clinton Delaware 2018 B18 lidar project called for the planning, acquisition, processing, and production of derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.3. The data was developed based on a horizontal datum/projection of NAD83 (2011) Contiguous USA Albers, Meters, and a vertical datum of NAVD88 (GEOID12B), Meters. DEM data was delivered as processed ERDAS IMG files formatted to 1,261 individual 1,000-meter x 1,000-meter tiles. Ground Conditions: Lidar was collected by Woolpert in a total of 4 missions from March 6, 2018 through December 11, 2018, while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Woolpert established 9 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 60 independent accuracy checkpoints (35 NVA points and 25 VVA points), were collected and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. Note: There was flooding present in an area around Delaware Lake. 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/78363 https://www.fisheries.noaa.gov/inport/item/49404 https://www.fisheries.noaa.gov/inport/item/78362 northlimit=40.4477677932; eastlimit=-82.7277328715; southlimit=40.1186897571; westlimit=-83.2670859803; start=2018-03-06; end=2018-12-11; 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