New Method Research on Remote Sensing Interpretation for Debris Flow Geological Hazard at Country Level

Through analysis of remote sensing technologypsilas application in the investigation and appraisal of geological hazard, in view of the application of remote sensing interpretation about debris flow geological hazard in small basin area, this paper presents the remote sensing interpretation method (RSVH) based on virtual GIS and hydrology spatial analysis. RSVH integrates virtual GIS, digital processing of remote sensing image and spatial analysis. Through degrades the large scale area to small spatial logic unit (SSLU), it creates three-dimension virtual scene on the SSLU using remote sensing image and high accuracy DEM data, and overlay layers that has rich attribute information such as terrain, geology, lithology, soil, hazard and so on. It solved the problem well about the remote sensing interpretation in the large scale area, provided a new way for geology hazard investigation work in small basin. So it has the important practical significance and value.