How to use the clues provided in a map: Maps are drawn to different scales, depending on their purpose. Here are three maps drawn to very different scales. Keep in mind that maps showing large areas have smaller scales. Maps showing small areas have larger scales. Example: Map of Greater London to show maps of different scales Map of Greater London: Find the gray square on the main map of Western Europe (left). This square represents the area shown on the map above. It shows London’s boundaries, the general shape of the city, and the features around the city. This map can help you find your way from the airport to the center of town. Map of central London: Find the gray square on the map of Greater London. This square represents the area shown on the map above. This map moves you closer into the center of London. Like the zoom on a computer or a camera, this map shows a smaller area but in greater detail. It has the largest scale (1 inch represents about 0.9 mile). You can use this map to explore downtown London. A London Landmark: The Houses of Parliament lie to the east of St. James’s Park and just west of the River Thames. A key is provided for the maps of all scales.