The city/county flood risk index in Gyeonggi-do is quantitative evaluation data calculated using an AI-based genetic algorithm. Using the national flood risk Map and 11 indicators—including buildings, population, farmland, and old structures—flood risk factors, exposure, and vulnerability were analyzed by city and county, and the index was calculated with optimal weights minimizing discrepancies with heavy rain and typhoon damage rankings. The calculated index quantifies flood risk by city and county, providing a scientific basis for disaster prevention and policy-making.

The Gyeonggi-do grid-level flood risk index is precise assessment data derived from an integrated analysis of 9 indicators across three categories—risk factors, exposure, and vulnerability—using a 100m spatial grid and flood risk maps. Each indicator was scored based on quantiles and weighted using entropy. After normalizing indices for the three categories, the comprehensive flood risk was calculated using Euclidean distance. The index allows precise identification of grid-level risk distribution in urban and rural areas, facilitating local disaster response and spatially tailored policy-making.

Information on flood-vulnerable facilities in Gyeonggi-do was constructed by integrating attribute data from building registration records and LiDAR-based high-resolution spatial data. Spatial information from LiDAR, including building location, height, and area, was combined with registration attributes—use, floors, structure, construction year—to identify facilities vulnerable to extreme rainfall, such as basements or old buildings. This data can support practical policy-making, including disaster response planning and prioritization of disaster prevention facilities.

The river flood map visualizes the extent and depth of flooding caused by embankment collapse or overflow under extreme flood conditions exceeding design frequency. This map covers national and local rivers and provides scenarios based on the frequency of each planned flood. The urban flood map depicts flooding extent and depth in five levels (below 0.5 m to above 5 m), assuming stormwater drainage capacity is exceeded or malfunctioning. Both maps, developed and distributed by the Ministry of Environment, are used for disaster management policies, including risk area designation, disaster prevention planning, and early warning system development.

A flood trace map is spatial data recording the extent and depth of flood damage from typhoons or heavy rainfall based on field surveys and measurements. In accordance with the Natural Disaster Countermeasures Act, local government heads prepare it within six months of the damage, and it is provided by the Ministry of the Interior and Safety. The map includes information on flood extent, depth, and duration, and is used to identify frequently flooded areas, designate disaster risk zones, establish recovery plans, and determine priorities for installing disaster prevention facilities.