2.1. Geographic Information System (GIS)
This study used by Geographic Information System (GIS) to map the vulnarable areas of climate change in two big
cities in Central Java Province. GIS is a set of hardware, software, geography and personal data to show the
information on geographycal reference. GIS can be used to access potential risk (Connors, 2006). Wood dan
Good (2004) uses GIS to identify earthquake and tsunami on airport and harbour. Rashed (2003) estimates the
social vulnerability on earthquake, Dai (2003) estimates rainfall characteristic to minimize sag risk. Parson, et.al
(2004), Zerger (2002), dan Cowell and Zeng (2003) use GIS to identify flood risk and mitigation and the model of
risk.