# parallels of latitude

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Related to parallels of latitude: Tropic of Cancer, longitude

## parallels of latitude

Any of the imaginary lines on the surface of the earth lying in an east-west direction that are parallel to the equator. They are used as north and south references in navigating and mapmaking. The equator is the 0° parallel of latitude, the geographic north pole is the 90° north latitude, and the geographic south pole is the 90° south latitude. See latitude.
References in periodicals archive ?
The method used by Rotz is to calculate meridians of longitude, and then the parallels of latitude. In Rotz's map the meridians of longitude are evenly spaced along the equator, so it is a simple matter of fitting a circle to the appropriate point along the equator and the two poles.
We observe that the value of [??] does not depend on the distance l of the conical circle from its center S (the vertex of a cone) so on each cone all the parallels of latitude have the same ratio of the circumference to the diameter.
They should see that the longitudinal angle is the same across all parallels of latitude and thus the coordinates depend on the radius of the circle of latitude of that point, which is already known from a previous activity.
FPI provides clues on the back of the pack, as follows: "Somewhere between the Port of Indecision and Southwest of Disorder, but no parallels of latitude or longitude mark the spot on a map.

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