latitude

Geographical coordinates are expressed by latitude and longitude. Latitude measures the angular distance of a place north and south of the equator, defined as 0 degrees; the North Pole is 90 degrees north; the South Pole 90 degrees south.  Longitude is the angular distance of a place east or west of the 0-degree Prime Meridian at Greenwich, England. St Petersburg’s latitude is N59°93'; the expedition was at a similar latitude, but in the South. The Antarctic Circle lies at an approximate latitude of 66.5 degrees south of the equator.