A cylindrical projection that is neither equal-area nor conformal. One of the simplest of all map projections to construct and one of the oldest. Also known as the Rectangular, La Carte Parallelogrammatique, Die Rechteckige Plattkarte and Equirectangular.

True to scale along the standard parallel.

Considerable distortion away from standard parallel.

Used by USGS for index maps of the conterminous US with insets of Alaska, Hawaii and various islands on the same projection.

Probably originated with Erastosthenes (275? - 195? BC), the scientist and geographer known for his fairly accurate measure of the size of the Earth. Claudius Ptolemy credited Marinus of Tyre with the invention in AD 100.