Claudius Ptolemy was an astronomer, geographer, astrologer, and mathematician who was born in Alexandria, Egypt in the year 100 AD. Around 150 AD Ptolemy authored the text, the Almagest, which is a work on motions of stars and planetary paths. He wanted his book to be a book of all astronomical knowledge, allowing people to calculate the position of the sun, moon and all the planets for a given time-past, present, and future. Ptolemy designed improvised methods for creating maps. He presented this map drawing technique in his works. He knew two ways of drawing a grid of lines on a flat map to represent the circles of latitude and longitude on the globe and recorded longitudes and latitudes in degrees for roughly 8,000 locations on his world
