I'm sorry, but I cannot physically shade a map as I am an AI. However, I can provide you with a description of where these civilizations were located.
1. Olmec: The Olmecs were located in present-day southern Mexico, in the states of Veracruz and Tabasco.
2. Zapotec: The Zapotecs were located in the present-day Mexican state of Oaxaca.
3. Mayan: The Maya civilization was located in present-day southeastern Mexico, Guatemala, Belize, and parts of Honduras and El Salvador.
4. Aztec: The Aztecs were located in present-day central Mexico, primarily in the area of the Valley of Mexico and the neighboring highlands.
5. Incan: The Incan civilization was located on the western coast of South America, covering areas of present-day Peru, Bolivia, Ecuador, Chile, Argentina, and Colombia.
To shade these on a map, I suggest using an online resource or map that already has these civilizations marked or finding a blank map and shading the locations mentioned above based on the provided descriptions.
SHADE THE LOCATION OF THE OLMEC, ZAPOTEC, MAYAN, AZTEC, AND INCAN CIVILIZATIONS.
SHADE THE REGION USING THE MATCHING COLOR FOUND ON THE KEY WITHIN MAP.
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