Study of Accuracy in Landslide Mapping Assessment Using GIS and AHP, A Case Study of Semarang Regency

Abstract

Semarang Regency is a region that is very vulnerable to landslides based on the spread of the wider area each year to the occurrence of landslides. The need for a proper assessment of the mapping of landslide hazard so that it can be used as decision making in the mitigation system in Semarang Regency. Geographical Information System (GIS) is the right method of mapping disaster-prone areas for a wide area with a relatively short time. This method is carried out as an effort to analyze risk and hazard mapping through the dissemination of hazard information so that it will accelerate the process of delivering information to the public and can improve preparedness in taking actions to reduce disaster risk. Then, various methods that can be used to obtain weighting and classification, one of which is to make a decision-making method using the Multi Criteria Decision Making (MCDM) method. One of the MCDM methods that can integrate with SIG is the Analytical Hierarchy Process (AHP). this research it can be concluded that the use of the AHP method to the GIS analysis of landslide mapping provides good accuracy with a value of 70.97% of the 31 validation points suitability. The results of this landslide map can be used as a basis for planning landslide disaster mitigation in Semarang Regency.