{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jane M. Hammarstrom", "hasEmail": "mailto:jhammars@usgs.gov"}, "description": "This dataset tabulates randomized  simulation results for amounts  of copper in metric tons in 163 permissive tracts for undiscovered porphyry copper deposits. The data from the child item Simulation results_sorted.csv for each permissive are  randomized to allow aggregation of regional and global data using an assumption of statistical independence.  This was done by generating a column of  4,999  random numbers and resorting the 4,999 sorted simulations by those random numbers.  The randomized distributions for each permissive tract in a region were then summed to compute regional and global totals.  \nFor an explanation of aggregation assumptions and underlying mathematics, see Schuenemeyer, J.H., Zientek, M.L, and Box, S.E., 2011, Global mineral resource assessment \u2013 Aggregation of estimated numbers of undiscovered deposits \u2013 an R-script with an example from the Chu Sarysu Basin, Kazakhstan: U.S. Geological Survey Scientific Investigations Report 2010-5090-B, 13 p., accessed October 10, 2011, at https://pubs.usgs.gov/sir/2010/5090/b/.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F70K26Q4", "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.5a674f32e4b06e28e9c5530c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5a674f32e4b06e28e9c5530c", "keyword": ["USGS:5a674f32e4b06e28e9c5530c", "copper", "metallic mineral resources", "natural resource assessment"], "modified": "2020-08-21T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-178.0, -60.0, 178.0, 83.0", "theme": ["geospatial"], "title": "Randomized distributions of amounts of copper in undiscovered porphyry copper deposits for 163 permissive tracts"}