Geographic information system-based mapping of flood-prone areas and evacuation routes in Cilandak Sub-district, South Jakarta City

Disaster is a series of events that have a direct impact in the form of threats to people's lives caused by either natural or non-natural factors so that the direct impacts caused are environmental damage, property losses, psychological impacts and loss of life. The research method used in this study is a qualitative method. Data processing is carried out using Geographic Information System software, namely QGIS version 3.16. With the development of mapping technology, especially in GIS, flood area mapping can be done to determine the final evacuation. The purpose of this study was to determine the level of flood vulnerability based on Geographic Information Systems (GIS) in Cilandak District, South Jakarta City and to determine the direction of temporary evacuation sites for flood disasters in Cilandak District, South Jakarta City. The location used was Kelapa Gading District, North Jakarta City. In this study, the data used were infrastructure data (buildings and roads) and population data. Building data in Kelapa Gading District has 77 buildings with a total affected area of 11,2045 ha. Meanwhile, the roads have a length of 65,385 km. Population data used for analysis is displayed in pixels and divided into five classes from a total population of 27,006 people. From the data on the distribution of buildings and buildings, it is then processed to create an Evacuation Route Map using the network analysis method.