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Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Continental U.S. physiographic regions. Region 12e identifies the Dissected Till Plains. The Dissected Till Plains are physiographic sections of the Central Lowlands province, which in turn is part of the Interior Plains physiographic division of the United States, located in southern and western Iowa, northeastern Kansas, the southwestern corner of Minnesota, northern Missouri, eastern ...
The Center for Earth Resources Observation and Science (EROS) is a United States Geological Survey data management, systems development, and research field center It serves as the national archive of remotely sensed images of the Earth's land surface acquired by civilian satellites and aircraft.
The system dates to Nevin Fenneman's report Physiographic Divisions of the United States, published in 1916. [2] [3] The map was updated and republished by the Association of American Geographers in 1928. [4] The map was adopted by the United States Geological Survey by publication in 1946. [5]
The former Sioux Ordnance Depot in Cheyenne County was the site of 70% of federal oil production from the Derrick, Table and Ehmke fields. [6] Of the 2,817 active oil and gas wells in the state on January 1, 2016, the Nebraska Oil and Gas Conservation Commission found that only two used hydraulic fracturing. [7]
The National Map Corps consists of volunteers who devote some of their time to provide cartographic information to the U.S. Geological Survey. The only requirements to participate are having access to the Internet and a current familiarity with the area being mapped. [6] This data is used to update The National Map.
The Oglala National Grassland is a United States National Grassland in the northwest corner of Nebraska. It is in northern Sioux and northwestern Dawes counties, on the borders with South Dakota and Wyoming. It is 94,520 acres (38,250 ha) in size and is one of the small handful of National Grasslands administered by the US Department of ...
The falls of the Big Sioux River in Falls Park, Sioux Falls, frozen over in winter. South Dakota has a continental climate, semi-arid in the west outside of the Black Hills, with four distinct seasons, ranging from very cold winters to hot summers. During the summers, the average high temperature throughout the state is often close to 90 °F or ...