Since 1959 the one-inch map has gradually been converted into a 1:50,000 series, using the same Lambert conical conformal projection, Everest ellipsoid, and quarter degree sheet lines, but mapping progress has been at best sporadic since the late 1950s. Mapping systems were established by the Survey of India between 19, with complete coverage at 1:126,720 and 1:253,440 scales, and one-inch coverage for 85 percent of Burma, excluding the mountainous north west regions.
The national mapping agency of Myanmar (until 1989 Burma) is the Myanmar Survey Department (MSD) in Yangon.
