Several Southeast Asian cities that had at least 4.0 million residents were not mapped. All of them started with fewer than 2.0 million residents in 1900. Two of them, Manila (in Pilipinas) and Krung Thep (in Thailand), had between 10.0 and 19.999 million metropolitan residents in 2012. Their growth was due in part to national population growth, in part to urbanization and in part to being capitals. (Manila was a colonial capital until the mid-century, then a national one. Krung Thep was a national capital throughout the century). The metropolitan areas extend beyond the city limits to incorporate nearby cities. (Thailand is mapped for other periods--just not this one. Pilipinas is not mapped for any period.)
The other cities, the ones that ended between 4.0 and 9.999 million metropolitan residents, are: Kuala Lumpur (in Malaysia), Singapore-Johor Bahru (bi-national but centered in the nation of Singapore), Hồ Chí Minh City (in Việt Nam and called Saigon in 1900), Yangon (in Myanmar and called Rangoon in 1900). (Việt Nam and Myanmar are mapped for other periods, just not this one. The Malaysia/ Singapore area is not mapped for any period.)