A high plateau patchy in the area, MAE Suai District wiang PA Pao and Chiang Khong.The mountains have a height of about 1 500 -,, 2 000 meters above sea level. The flat part along the river basins in the middle of the area, including Phan City, MAE Chan. I late. Chiang Saen and Khong, with a height of about 410 - 580 meters. Above sea level, with an area of study, all 11 678.369 square kilometers, or 7, 298 981 rai.
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