Drawing Flood Risk Map Efficiently Based on Cartographic Data Model (PAP014396)
Flood resilient societies through community preparedness
Flood risk maps, which help flood risk management, should display three types of information at least. They are basic geography, hydraulic project and flood risk information. They will be widely used for land-planning, river basin flood control planning, flood control decision, flood insurance, enhancing public awareness of flood risk and so on. They are should be more readable because they will supply services not only for the professional of different field also for the public. For improving the readability of flood risk maps, they should be standard, uniform and authorized. The research and attempt about flood risk maps in our country had been in progress all through the past 30 years, and the flood risk maps of about 90 pilot regions had been finished But the results were all different which behave in three points: nonstandard cartographic symbols which easily lead to wrong interpretation of map, non-uniform style and layout, the other was random map content. These problems are bad for flood risk maps been used effectively. Before large-scale mapping of flood risk began in our country, these problems should be solved. In this paper, a method for drawing flood risk map more effectively will be suggested. The key point is building a prefect cartographic data model. In this model, several related standard will be embedded in. The main content of the model include four aspects as follows: classification and layering of primary map data, coding of each data layer, standard cartographic symbols, and standard style and layout of the map. In the model, standard cartographic symbol contain all the involved data type such as geographic, hydraulic project, flood control engineering, flood risk and so on. Each type of cartographic symbol is made according to the related GB and trade standards. The style and layout are complied with the issued detailed rules of flood risk maps. The results of different regions or different drawer will well satisfied the requirement raised above only if they draw the flood risk map based on the model. And another advantage is the model will help the drawer reducing the workload greatly. The main work they need to do is preparing and dealing with the primary data according to the classification and coding rules set down in the model. Remaining works will be leaved to the model.