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| An imaginary line the Earth rotates around. On maps and globes it's the line that measurements are made from to determine a specific location. |
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| An instrument used for navigation (points North). |
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| The imaginary circle around Earth, halfway from the poles. It divides the Earth in half; into the Northern Hemisphere and the Southern Hemisphere. |
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| A diagram shows the directions north, south, east, and west as abbreviated initials marked on the compass. |
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| The angular distance in degrees, measured from the center of the Earth to a point east and west of the Equator. It's a system used to locate positions on Earth. |
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| A geographic coordinate that specifies the north-south position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees. |
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| A line of longitude in a geographical coordinate system at which longitude is defined to be 0°. |
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| A table or chart included on a map to indicate the meaning of the map's varied symbols. |
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