Geography of South Dakota of the federal or state government, such as Badlands National Park, Wind Cave National Park, and Custer State Park, are located in the state. In 2011, the population of South Dakota was estimated to be 824,082, and the state ranks fifth-lowest in both total population as well as population density in the United States. Sioux Falls, with a population of just over 170,000, is the largest city in the state. Rapid City ranks as South Dakota's second-largest city, and Pierre is the state capital. Historically a very agricultural state, the service and tourism sectors have grown in economic importance in
South Dakota State University Science. The GSCE focuses on basic and applied research in terrestrial remote sensing. SDSU was recognized in 2017 by ShanghaiRanking Consultancy as the 7th most productive university in the US (and 27th globally) for remote sensing research for the period 2011–2015. The university operates the South Dakota state agricultural research stations around the state, such as the Antelope Range and Livestock Research Station near Buffalo. The Great Plains Writers Conference is a venue for significant regional authors or writers interested in the Great Plains. It was instituted at SDSU in 1976 for writing scholarship. Alumni from the university's research community