Owing this area is the confluence of two rivers, Pa Sak and Chao Phraya, with the terrain like a three-way junction.

The torrent have made it a point where boats and ships as well as junks often capsized and sank since Ayutthaya was the capital of Thailand more than 600 years ago.

Legendarily Chinese princess Soi Dok Mak's ship capsized and sank in front of neighbouring Wat Phanan Choeng.

They were permitted by the Ayutthaya royal court to settle on both sides of the Chao Phraya River below Wat Phanan Choeng.

According to Phraya Boranrajathanin, the governor of Monthon Khrung Kao (the official name of Phra Nakhon Si Ayutthaya Province during the Chulalongkorn's reign) and key archaeologist in that era.

In the east part, there was a ditch named Khu Khue Na draining from Hua Ro (now a populated place and namesake historic market in the northeast edge near Chandra Kasem Palace) to meet the Chao Phraya River in front of Wat Phanan Choeng.

Neighbouring subdistricts are, clockwise from north, Pratu Chai, Ko Rian, Khlong Takhian, and Pak Kran.

The area also consists of 11 administrative muban (village) The emblem of Samphao Lom SAO shows a junk sailing on the water surface.