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31st parallel north

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Through Circle of latitude, Earth and Africa

Part of the border between Iran and Iraq is defined by the parallel.

In the United States, it defines part of the border between the states of Mississippi and Louisiana, and most of the border between Alabama and Florida. Andrew Ellicott surveyed this parallel in 1797, which in Pinckney's Treaty two years before had been defined as the border between the United States and the Spanish territory of West Florida.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 31° north passes through:

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