Below: Matt Poole contributed this British sketch map of Mingaladon made from a photo-reconnaissance mission in May 1943, before the Japanese lengthened the east-west runway (large image--give it time to load!):
Some of the dispersal areas were likely built by the Japanese after they occupied the airport in February 1942. On documents Matt found at the Public Records Office near London, runway 06/24 is shown as 3960 feet "between turning circles." Runway 12/30 is 3750 ft, and Runway 35/18 is 4200 ft. (Toward the end of the war, the Japanese lengthened 12/30 to the west, actually crossing the Rangoon-Pegu Road. It was this longer runway that I mistakenly described in my history of the AVG.)
By way of comparison, here's a Japanese sketch of Mingaladon as revealed by reconnaissance photographs in December 1941. Thirteen crossmarks show where RAF and AVG aircraft were dispersed when the photo plane went over. The sketch was published in a semi-official Japanese history of the air war in Southeast Asia.