Marinus of Tyre

Marinus of Tyre (c. AD 70–130) was a Greek-speaking Phoenician Roman geographer, cartographer, and mathematician. He lived a long time ago and helped create important ideas about mapping the world.

Marinus is best known for founding something called mathematical geography. This means he used math to better understand and draw maps of the Earth.

His work laid the groundwork for a famous book called Geography written by Claudius Ptolemy. Ptolemy’s book became very influential and helped shape how people saw the world for many years.

Life

Marinus came from Tyre in the Roman province of Phoenicia. He was an important geographer whose work helped shape later maps and studies of the world. The famous geographer Claudius Ptolemy used Marinus' ideas in his book Geography, and even mentioned Marinus in his writings. After Marinus, other writers like the Arab geographer al-Masʿūdī also referred to his work. Unfortunately, not much more is known about his life.

Legacy

Marinus helped improve maps and created a system of sea charts. He was the first to give each place a proper latitude and longitude. His starting line for longitude ran through the westernmost land known at the time, near today’s Canary or Cape Verde Islands. He used the latitude of Rhodes for his measurements.

Marinus studied the work of earlier mapmakers and travelers’ diaries. His maps were the first in the Roman Empire to show China. He created a way to draw maps called equirectangular projection, which is still used today. He believed the world’s oceans were split into two parts by Europe, Asia, and Africa. Marinus also named the area opposite the Arctic the Antarctic.

In 1935, a mark on the Moon was named after Marinus.