{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Joel B. Sankey", "hasEmail": "mailto:jsankey@usgs.gov"}, "description": "These datasets consist of four, 1-meter spatial resolution digital surface models (DSMs) that were generated to orthorectify airborne multispectral imagery acquired in 2002, 2009, 2013, and 2021 for the Colorado River in Grand Canyon in Arizona, USA. These datasets also consist of a 1-meter spatial resolution digital elevation model (DEM) that was generated from the 2021 DSM. The DSMs and DEM were also produced to support development of additional GIS products. Elevation values are expressed as ellipsoid heights. These datasets also include accuracy assessments that were performed to show the limitations of estimating elevation from the DSMs and DEM pixels locations on the landscape. Data were acquired during periods of low steady Colorado River flow of approximately 8,000 cubic feet per second released from Glen Canyon Dam.", "distribution": [{"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.628b977ed34e4fef2ec3cd9a.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P93Y4FMJ", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_628b977ed34e4fef2ec3cd9a", "keyword": ["management", "imageryBaseMapsEarthCover", "Tapeats Creek", "image classification", "USGS:628b977ed34e4fef2ec3cd9a", "Paria River", "airborne imagery", "Arizona", "Bright Angel Creek", "monitoring", "Glen Canyon Dam", "Havasu Creek", "remote sensing", "Grand Canyon", "Kanab Creek", "Shinumo Creek", "Diamond Creek", "data release", "Grand Canyon National Park", "Little Colorado River", "Separation Canyon", "digital surface model", "Lees Ferry", "Glen Canyon National Recreation Area", "Colorado River", "adaptive management", "Glen Canyon", "field inventory and monitoring", "change detection", "Marble Canyon", "digital elevation models"], "modified": "2025-01-23T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-114.02379, 35.740126, -111.476798, 36.965854", "theme": ["geospatial"], "title": "Digital elevation model (DEM) and digital surface model (DSM) data for the Colorado River corridor in Grand Canyon National Park and Glen Canyon National Recreation Area (2002, 2009, 2013 and 2021), including accuracy assessment data"}