By Dr. Tim Ball – Re-Blogged From WUWT
In a recent article, I used an illustration of 1200 km circles around a weather station to illustrate the extent the IPCC considered it represented. A comment about the article asked if I was aware of the map distortion and its effect on the circle of coverage. It was an arcane but important observation. He was pointing to the distortion created by using a Mercator projection map.
I am very aware of the distortion. My entire career involved working with maps. This included flying in the Air Force; teaching courses and running labs about maps and map reading; studying climate weather maps; the movement and migration of people driven by climate change; and teaching a course in political geography. I provided major research for a book on the search for the Northwest Passage on the Pacific west coast written by Sam Bawlf titled, “The Secret Voyages of Sir Francis Drake.” Dr. John Dee, science advisor to Queen Elizabeth I, gave Drake his sailing and scientific instructions. This included accurately determining the longitude of the west coast of North America. This research resulted in Drake visiting the Dutch map maker Abraham Ortelius (1527-1598) after his return. Two months after Drake’s visit Ortelius produced a new world map with the coast shifted 60° of longitude to its proper position.