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Once you can read maps, you can compare maps. By comparing the information on different maps, you can learn how many features work together to make a place special. For example, if you compare a map of North American waterways to a map of North American cities, you'll find that most cities are located on waterways. This is important geographical information—it shows that
water is one thing people think about when deciding where to live.
Maps make these patterns EVIDENT-CONFUSING-NONEXISTENT-INDISTINGUISHABLE
What is Evident