面向地质灾害的快速制图系统关键技术研究

Research on Key Technologies of Rapid Mapping System for Geological Disasters

针对地质灾害发生时对于应急专题地图的迫切需求问题,本文设计了一套完整的快速制图工艺流程。首先以地理数据库的数据模型为基础,通过对地图符号信息的总结归纳,扩展设计了面向地图制图的数据模型,实现了图库一体化的制图数据库设计。根据制图要素自身的地理特征及其周边的环境,在经典地图综合理论方法的指导下,基于制图要素输出时的状态表达,构建了多比例尺制图数据生成与表达模型,设计了矢量数据动态选取及加工处理的算法,实现了地质灾害应急制图中制图要素的自动化快速选取。

Aiming at the urgent need for emergency thematic map of geological disasters,this paper designed a complete set of fast mapping processing flow.First of all,based on the model of geographical database,the data model of map drawing is designed by summarizing the cartographic symbol information,and the design of map database is realized.According to the geographical features of the cartographic elements and their context,under the guidance of the classical map synthesis method and the state expression of the output of the cartographic elements,a multi-scale cartographic data generation and expression model is constructed,and the algorithm of dynamic selection and processing of vector data is designed and realized the process of automatic and quick selection of cartographic elements in emergency mapping of geological disasters.