2022 Indiana DNR Lidar: Indiana Coastline

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Product: These lidar data are processed Classified LAS 1.4 files, formatted to 1995 individual 1250 ft x 1250 ft tiles clipped to the DPA; used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Geographic Extent: LaPorte, Lake, and Porter counties Indiana and a small portion of Cook county Illinois, covering approximately 112 square miles. Dataset Description: The lidar project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification 2021, Revision A. The data was developed based on a horizontal projection/datum of NAD83(HARN), Indiana West Feet, and vertical datum of NAVD88 (GEOID18) Feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 1995 individual 1250 ft x 1250 ft tiles clipped to the DPA, as tiled Intensity Images and tiled bare-earth DEMs; all tiled to the same 1250 ft x 1250 ft schema. Ground Conditions: Lidar was collected in April 2022, while no snow was on the ground and rivers were at or below normal levels. Sanborn Map Company, Inc. established a total of 25 accuracy check points, 20 in Bare Earth and Urban landcovers (20 NVA points), 5 in Tall Grass and Brushland/Low Trees categories (5 VVA points), that were used to assess the vertical accuracy of the data. These data were received by the NOAA Office for Coastal Management (OCM) from the Indiana Dept. of Natural Resources (IN DNR). NOAA OCM processed the data to be available for custom and bulk downloads from the NOAA Digital Coast Data Access Viewer (DAV). In addition to the lidar point data, topobathy bare earth Digital Elevation Models (DEMs) at a 1 foot grid spacing, created from the lidar point data are also available from the NOAA Digital Coast. The link to these data and the breaklines are provided in the URL section of this metadata record. Contours and hillshade rasters are available by request at coastal.info@noaa.gov. This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data.
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