Difficulty degree zoning for 1∶50,000 geological mapping in karst area based on RS and GIS

In light of technical requirements for 1∶50,000 geological mapping in karst area, the techniques of Remote Sensing (RS) and Geographic Information System (GIS) was employed to perform the geological interpretation and associated data analysis. On the basis of detailed interpretation of regional geology, geomorphology, environment, hydrology and other factors, the difficulty degree for mapping process was qualitatively divided by using parameters such as stratigraphic extension, topography, drainage pattern and gully density. The field studies show that the research results using this method are basically consistent with the actual geological conditions in the study area. This method can be used as the basis of the work arrangement of 1∶50,000 geological mapping in karst area, which can significantly improve the working efficiency and reduce the field workload on the premise of ensuring the accuracy of the results. It also can improve the quality of the RS technique system of 1∶50,000 regional geological survey in the karst area of Southwest China.