The Eastern Empire managed to divert the Visigoths into Italy, thus shoving the problem onto the Western Empire, which responded to this threat by pulling troops from the Rhine frontier. This triggered a pattern of events much like the cycle of anarchy in the third century C.E., only this time, no Aurelian or Diocletian emerged to save the Empire.
Because latitude runs from the equator to one or the other of the poles, 90 degrees. That's one-fourth of a full circle around the globe. Longitude starts at Greenwich, Englanâ¦d and runs, to the west or to the east, to the International Date Line (in the Pacific Ocean), 180 degrees.
Thus a degree of longitude is 69 miles = 364320 feet, and 0.1 degree is 36432 feet, and so on. Take a look at the table in the article Understanding GPS coordinates to understand this concept better. Hopefully, more and more commercial GPS units will use this degree decimal system in the future.