{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jeffrey R Irwin", "hasEmail": "mailto:jrirwin@usgs.gov"}, "description": "Airborne light detection and ranging (lidar) can provide high-quality topographic information over large areas.  Lidar is an active remote sensing technology that employs laser ranging in near-infrared and green spectral wavelengths to provide three-dimensional (3D) point information for objects, including Earth\u2019s surface, vegetation, and infrastructure.  The U.S. Geological Survey (USGS) National Geospatial Program (NGP) 3D Elevation Program (3DEP) seeks to systematically acquire airborne topographic lidar for the conterminous U.S. (conus), Hawaii, and the U.S. territories.  A series of field accuracy assessment surveys, using conventional surveying methods (i.e. total station and Global Navigation Satellite System (GNSS)) along with ground based lidar (GBL), were conducted at test sites in Northeastern Illinois (NEIL) to evaluate the 3D absolute and relative accuracy of airborne lidar acquired for 3DEP.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9CVRD1X", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5d9cdf50e4b03661629239aa.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5d9cdf50e4b03661629239aa", "keyword": ["3D Elevation Program", "3DEP", "GNSS", "Global Navigational Satellite System", "Ground Based Lidar", "Illinois Beach State Park", "Lake County, Illinois", "Lake Michigan", "Lidar", "Light Detection and Ranging", "NGP Elevation Applied Research", "National Geospatial Program", "Shiloh Park", "State of Illinois", "Total Station", "U.S. Geological Survey", "USGS", "USGS:5d9cdf50e4b03661629239aa", "elevation", "geoscientificInformation", "location"], "modified": "2020-08-18T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-87.83420, 42.40950, -87.80050, 42.48900", "theme": ["geospatial"], "title": "Northeastern Illinois (NEIL) Six County Airborne Lidar Validation Survey Data"}