What did ptolemy do research in?
Ptolemy lived in Alexandria, Egypt from about 120 A.D to 180 A.D. He is known as The Father of astronomy. He developed the idea that the Earth was the center of the universe.
I'm not sure why you think he revolutionized map making. He definitely created an idea that subsequent generations "believed" and then created maps based on his perspective of the universe. He had an active imagination...one that reigned supreme and unchallenged. He was a fantastic thinker for his day and very persuasive. Erastosthenes proved that the earth was round almost 200 years before the birth of Christ. It has always saddened me to know how many years of technology were stymied by ignoring his information.
The real revolutionary ideas in map making came about once it was accepted that the earth was round and then again with the discovery of a means to determine longitude by use of a sea-worthy clock. The mariners were great with latitude by use of sextants, but if you look at old maps (before the late 1700's) they show North America as close to Europe as Bermuda is to Florida.The scale was completely off as well as the juxtaposition of land masses/continents. It really has not been that long ago...
The ancestral founder of the Greek city of Thebes, in the thirteenth century BC, was called Ptolemy, or Polemy.
There were a number of kings of other Hellenistic countries named Ptolemy.