Aplikasi Pemetaan Multi Risiko Bencana Di Kabupaten Banyumas Menggunakan Open Source Software Gis

Banyumas regency is one of regions in Central Java province that is categorized as prone disaster, especially floods and landslides. With these sort of conditions, research is needed that focuses on local scale to conduct multi risk mapping of flood and landslide disasters as an effort to mitigate the disaster in Banyumas regency. Multi risk map of flood and landslide disasters in Banyumas regency made based on Geographical Information System (GIS) using open source software called Quantum GIS. The method used are scoring and weighting, along with overlays between the constituent parameters. From a research using the VCA matrix multiplication, congruity value as much as 66,667% risk of flood, 77,778% risk of landslide and 61,111% against multi risk disasters of flood and landslide. The modeling results of multi risk disasters obtained 51,785% of the area in Banyumas regency is highly at risk disasters, 18,960% is moderately at risk and 29,255% is low at risk of flood and landslide disasters. Quantum GIS can be used as an alternative device to process GIS although there may still be some deficiency may occur in data analysis with vector format which could not perform the union of three shape files or more