A Map Maker Picks What to Show
A map is a small picture of a big place. A map maker cannot put everything on it. If she did, the map would be too crowded to read. So she has to choose.
First, she asks what the map is for. A map for hikers needs trails, hills, and streams. A map for drivers needs roads and road names. A map for a zoo shows paths, animals, and where to find a snack.
Next, she picks symbols. A small tent can mean a campsite. A blue line can mean a river. She adds a key, which is a little box that tells what each symbol means.
Last, she checks her work. A good map has to be right, so people do not get lost.
Map makers use computers today, but they still think about the same question. What does the reader need to find?