Developing Recognition and Simple Mapping by UAV/SfM for Local Resident in Mountainous Area in Vietnam—A Case Study in Po Xi Ngai Community, Laocai Province

Laocai is one of the provinces of northwestern Vietnam that is at high risk of landslide. Typical natural features of this area are hilly terrain, complex geology, tropical monsoon climate with large annual average precipitation. People of ethnic minorities in the area up to now still affected by natural disasters. They desperately need appropriate tools for identifying and responding to this disaster. This study is a test fand quick landslide inventory map-making based on the application of modern technologies such as UAV/SfM to the building up of landslide identification and distribution maps in combination with checking and revising by site survey with the participation of local people for an area of Po Xi Ngai village, Lao Cai province. By recognizing the landslides on 3D images of the area in conjunction with the fieldwork checking, this method is expected to give local people the knowledge of landslide identification to develop the prevention and mitigation strategies by their capacity.