Known as the Grand Canyon state, Arizona's capital is located in Phoenix, and the state has a land area of 113,635 square miles. Arizona's highest point is Humphreys Peak at 12, 633 feet where its lowest point is the Colorado River at 70 feet. Once primarily a mining and agricultural area, Arizona developed a diversified economy after 1950 and in the 1990s was an important producer of high-technology items, notably in the Phoenix region. Arizona also enjoys successful copper-mining, cotton-growing, and tourist industries. The name of the state is derived from an Indian word (arizonac) believed to mean a place of the small spring. Arizona is called the Grand Canyon State.