Résumé en anglais
Spiritual and geographical consideration giving birth to Southeast Asian settlements was studied. The incremental and decisive changes from modern development in the 20th century have altered historical plans obviously. Among Southeast Asian cultures, Khmer civilization was the most glorious and occupied almost Southeast Asian continent during the 5th-13th centuries. Road network extended from Cambodia to Thailand and Lao. Satellite imageries and aerial photographs along with field surveys were used to identify land uses and changes to Khmer settlements. The main road approximately 230 kilometers, linking Angkor to Phimai was indicated and named “salt road”. Phimai was the upland and ancient salt manufacturing center. Settlements along the roads were cities with stone and brick monuments and pottery manufacturing sites (produced for liquor and fermented fish). Geometrical city plans and their cultural landscapes with unique water management system were revealed. These cultural environment and landscapes have not either been preserved along with monuments or conserved in their significant cultural corridor context. As the result, an ECP (Eco-Cultural Planning) approach is also proposed for the conservation of monuments along with their cultural environment and landscapes under the sustainable development paradigm.