Mercator projection(redirected from Mercator projections)
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one of the cartographic projections. The Mercator projection is equiangular and cylindrical. In this projection all the loxodromes—lines on a sphere intersecting all meridians at the same angle—are represented as straight lines inclined at the same angle to the meridians. The projection is widely used in making marine and aeronautical charts, and it is also often used in oblique orientation. The projection was developed and first employed by G. Mercator in 1569.