The Chiang Rai Map product has two maps in it, one is the province’s district map and the other is the provincial outline map. Chiang Rai Map has 18 districts, with each district as an individual shape.
Chiang Rai is one of Thailand’s seventy-six provinces lies in upper northern Thailand, with Phayao, Lampang, and Chiang Mai as the neighboring provinces. It borders the Shan State of Myanmar and Bokeo Province of Laos.
You can further explore this Thailand province administrative division in Wikipedia.