Application of high resolution satellite images IRS P5 to detailed landslide hazard assessment

Landslides, one of the major geo hazards, always cause a major problem by killing hundreds of people every year besides damaging the properties and blocking the communication links. In order to mitigate hazards of mass failure, the first step is the production of a landslide susceptibility map. Landslide inventory maps can play important role to prepare landslide susceptibility maps. field observations for preparing these maps are very costly and time consuming also Aerial photos can’t be acquired regularly and don’t have global cover, old satellite images have had low spatial resolution and needed to have control points in order to correct geometric errors that was the reason landslide replacements have approximately been recognized by spectral analysis on that time. The recent improvements in the high resolution satellite image technology, has provided a possibility of geometric corrections with rational coefficient and georeferencing with just one ground control point using GPS/INS/Star-tracker installed in the satellite. By high resolution satellite images, we’ll be able to detect replacements of ground which is the important parameter to provide landslide prediction models. In this paper, four epochs of the high resolution satellite images IRSP5 in Damdol village, Ardebil Province, Iran, are used to detect landslide ground replacements. Our results that are compared with GPS data which are acquired by precise Istasanj consultant engineering show the calculated discrepancies are less than half meter.