The invention of a

**geographic coordinate system**is generally credited to**Eratosthenes of Cyrene,**who composed his now-lost Geography at the Library of Alexandria in the 3rd century BC. A century later, Hipparchus of Nicaea improved on this**system**by determining latitude from stellar measurements rather than solar altitude and determining ...Eratosthenes in the 3rd century BCE first proposed a

**system**of latitude and longitude for a map of the world. His prime meridian (line of longitude) passed through Alexandria and Rhodes, while his parallels (lines of latitude) were not regularly spaced, but passed through known locations, often at the expense of being straight lines. [1]**Descartes,**a French mathematician and philosopher, was born in La Haye, France (now named in his honor) on March 31, 1596. His parents taught him at home until he was 8 years old, when he entered the Jesuit college of La Fl è che. There he continued his studies until he graduated at age 18.Cartesian

**coordinates**are named for René Descartes, whose invention of them in the 17th century revolutionized mathematics by allowing the expression of problems of geometry in terms of algebra and calculus.Mar 1, 2019 · Hipparchus, a Greek astronomer (190–120 BC), was the first to specify location using latitude and longitude as co-ordinates. He proposed a zero meridian passing through Rhodes.

In the cylindrical

**coordinate system**, a z -**coordinate**with the same meaning as in Cartesian**coordinates**is added to the r and θ polar**coordinates**giving a triple ( r , θ , z ). [7] Spherical**coordinates**take this a step further by converting the pair of cylindrical**coordinates**( r , z) to polar**coordinates**( ρ , φ) giving a triple ( ρ , θ , φ ).Sep 14, 2023 · This article was most recently revised and updated by

**Erik Gregersen.****Coordinate system**, Arrangement of reference lines or curves used to identify the location of points in space. In two dimensions, the most common**system**is the Cartesian (after René Descartes)**system**.