As previously reported, the construction measure used in dimensional planning of the Khmer architecture was considered around 412 mm. In this paper, we verified this envisioned construction measure by analyzing from on-site measurement data the planning process of the pyramid temple called “Prang” in Prasat Thom at Koh Ker, the height of which was mentioned several times in the inscriptions.
The results are as follows: Firstly, the original plan of the monument existed. This initial plan was regulated to prevent its central axis passing in the center of the land. With this regulation, total dimension of the pyramid was reduced, the height of present “Prang” corresponded well to the previous interpretation of the inscriptions in consequence. We also confirmed that the construction measure of 412 mm applies to this monument reasonably.
