90th meridian west, meridian
The 90th meridian west is a line of longitude that runs from pole to pole and passes through Canada, the United States, Mexico, Guatemala, and El Salvador. Cartographers and navigators use this invisible line as a fundamental reference point to determine locations on Earth.
This line of longitude was standardized in the 19th century as part of an international coordinate system. The establishment allowed cartographers for the first time to map the Earth systematically and determine locations with accuracy.
This line is not a place you can visit but rather an invisible boundary on Earth. You can track its position on maps or with GPS devices to see how it runs across countries and landscapes.
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