LexBrew
Usage Entry 1493 / 1605 60-second read

Equator vs. Prime meridian

The 0° latitude line (horizontal) versus the 0° longitude line (vertical).

The comparisoni

✗ Wrong

The equator runs through London.

✓ Correct

The PRIME MERIDIAN runs through Greenwich (London). The EQUATOR is at 0° latitude — the horizontal line dividing north and south hemispheres.

The ruleii

EQUATOR = latitude 0. MERIDIAN = longitude 0.

EQUATOR: 0° latitude — the horizontal line equidistant from the poles. PRIME MERIDIAN: 0° longitude — the vertical line, by international convention through Greenwich, England (set in 1884). Both define the global coordinate system.

Memory aidiii

Remember it like this

Equator horizontal; meridian vertical.

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