{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Carl J. Legleiter", "hasEmail": "mailto:cjl@usgs.gov"}, "description": "This data release consists of an orthophoto of the Tanana River in Alaska acquired on July 24, 2019. The orthophoto was produced from images obtained using a Hasselblad A6D-100C 100 megapixel digital mapping camera deployed within a pod mounted on the landing gear of a Robinson R44 helicopter.  Images were acquired as the helicopter transited a series of flight lines designed to provide complete coverage, with ample overlap, of the study area along the Tanana River. Also within the pod was an ATLANS GPS/Inertial Motion Unit (IMU) that recorded the position and orientation of the platform during the flight.  This information was used to geo-reference the images by performing aerial triangulation and bundle adjustment within the TerraSolid software suite, which was also used to produce a LiDAR DEM that was incorporated into the orthophoto production process.  The resulting orthorectified image had a spatial resolution (pixel size) of 0.1 m.  The image is saved as a GeoTIFF file with an embedded header that contains the spatial referencing information for the image; the projected coordinate system is UTM Zone 6N, NAD83.  The main purpose of this orthophoto was to serve as a base for geo-referencing the video described in a related data release accessible from the parent landing page cited above.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9ZY5LK1", "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.5fb7b60dd34eb413d5e14811.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5fb7b60dd34eb413d5e14811", "keyword": ["Alaska", "Nenana", "Orthophotography", "Remote sensing", "Tanana River", "USA", "USGS:5fb7b60dd34eb413d5e14811", "geo-referenced", "image", "river"], "modified": "2021-05-03T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-149.1100, 64.5613, -149.0629, 64.5732", "theme": ["geospatial"], "title": "Geo-referenced orthophotos of the Tanana River, Alaska, acquired July 24, 2019"}