Application of GIS technology in the regionalization of geological hazards

Xiuyan County is a typical area hit by geological hazards of mountains in eastern Liaoning. These hazards mainly include collapses, landslides and mud-debris flow. On the basis of a wealth of data gathered in field investigations of geological hazards, an access database was established. By using the function of projection change on the platform of the GIS software, the files of the database were transformed into graphic files with an attribute and the distribution map of geological hazards was also constructed. Through the superposed calculation on the vectored layers and the files of hazard points after the research area was gridded, the regionalization map and isoline map of hazard-prone degrees were prepared. The hazard regionalization reveals the spatial distribution of geological hazards and their relations with the geological environment and human activities.