What does Alta California mean?
Also know, what were the boundaries of Alta California?
The Adams–Onís Treaty of 1819, between the United States and Spain, established the northern limit of Alta California at latitude 42°N, which remains the boundary between the states of California, Nevada and Utah (to the south) and Oregon and Idaho (to the north) to this day.
Similarly one may ask, why were the missions of Alta California set up?
The Alta California missions, known as reductions (reducciones) or congregations (congregaciones), were settlements founded by the Spanish colonizers of the New World with the purpose of totally assimilating indigenous populations into European culture and the Catholic religion.
Baja California (Spanish pronunciation: [ˈbaxa kaliˈfo?nja] ( listen); English: "Lower California"), officially the Free and Sovereign State of Baja California (Spanish: Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 Federal Entities of Mexico.