The first theme of geography is location. Location is the geographic position of people or things on Earth. For example, each world city has a location, a geographic position. Open the POLITICAL world map. Zoom in and out, clicking on South America. Notice the number of cities on the map increases as you zoom in because smaller cities appear on the map as you zoom in. Using the zoom function, get the map scale so you can see most of South America (the scale bar on the bottom left of the map should range from 0 to 600 mi). At this scale, the location of cities in South America is generally: