[3] Prince Damrong (then known as Phra Ong Chao Ditsawarakuman) conceived the idea of forming a Survey Department.

King Rama V granted the establishment of the Thai Survey School in 1882, with initial recruits coming from the Royal Guards.

[4] The first Department Director, Ronald Worthy Giblin, F.R.G.S., noted when survey began in 1896, "It so happens that 40 metres or 4,000 centimetres are equal to one sen in Thai units of measurement, so all cadastral plans are plotted, drawn, and printed to a scale of 1:4,000."

The department also engages in the production and sale of detailed maps, which initially were made by the process of zincography.

[5] The phrase “the Royal Thai Survey” at the lower center of the front and back replaced that of de le Rue starting in 1942.