Why was Operation Highjump important for mapping Antarctica?

Operation Highjump (1946–1947), led by Richard E. Byrd, was the most massive sea and air operation attempted in Antarctica at that time. Its importance for mapping the continent lies in its extensive use of aerial technology to document previously uncharted regions.1

The expedition utilized 13 ships and 25 airplanes to conduct large-scale aerial photography missions. These efforts resulted in 49,000 photographs that, when combined with images from land-based aircraft, covered approximately 60 percent of the Antarctic coast. Notably, nearly one-fourth of the area surveyed had never been seen before, significantly advancing geographic knowledge of the continent. The data gathered during this operation was so substantial that subsequent expeditions, such as Operation Windmill in 1947–1948, were specifically organized to obtain ground checks for the aerial photography produced by Operation Highjump.12