All routes to South Pole start on "left half", none on "right half"

Left and right half are lousy terms to use to apply to Antarctica but the maps of routes to South Pole DO seem to be divided like that. Normally, geographers label Antarctica by East and West. West is on the normal left half of a map with the Peninsula at 10:00 and McMurdo at 6:00. However some journeys to the south pole seem to start at 12:00. NONE seem to originate from 12:00 to 6:00 considering Antarctica as a clock circle. I don't know what this means, yet, as applied to the flat earth ice rim Antarctica. Here's a bing search on antarctica south pole route so that you can take a look at what I mean. Notice how all the routes to south pole ORIGINATE from 6:00 to 12:00 and NONE from 12:00 to 6:00. routes to the south pole - Bing Images