<P> In the September 1919 issue of Trestle Board Magazine, Mason William Galliher stated that knowledge of the Great Pyramid being the geographical centre was "determined by many years of scientific investigation" and that the Great Pyramid was likely to be the "last of the present land surface of the earth" to survive a cataclysmic event, due to its positioning . </P> <P> In 1973, Andrew J. Woods, a physicist with Gulf Energy & Environmental Systems in San Diego, used a digital global map and calculated the coordinates on a mainframe system as 39 ° 00 ′ N 34 ° 00 ′ E ﻿ / ﻿ 39.000 ° N 34.000 ° E ﻿ / 39.000; 34.000 ﻿ (Geographical centre of all land surfaces on Earth (Woods 1973)), in modern Turkey, 1,000 km north of Giza </P> <P> In 2007, Susan Wise Bauer claimed in her book Earliest Accounts to the Fall of Rome, that the theory that the Great Pyramid was the geographical centre of Earth would only hold true if a Mercator projection is used as the map for Earth, which was "unlikely to have been a common practice of the ancient Egyptians". </P>

What place is the centre of the earth