基于图层约束的自然灾害风险制图综合初探——以西北干旱区为例

地图自动综合是一项表达客观地理规律的复杂的决策处理过程,也是灾害风险制图,特别是自动制图综合的热点和难点。从灾害系统理论角度出发,运用地理学规律,在GIS等技术支持下,结合传统制图综合的相关理念和技术,探讨基于图层约束的灾害风险制图综合的内涵、方法,并以我国西北干旱区为例,基于人口与绿洲承灾体图层约束,评价区域灾害风险等级。结果表明:自然灾害风险制图综合理论构架可以表征为语义、结构、阈值、空间和视觉学方面的图层约束。西北干旱区基于人口与绿洲承灾体图层约束的风险制图,对于风险识别、风险防范更具明辨性、准确性和区域针对性。

Elementary Study on Natural Disaster Risk Mapping Generalization Based on Drawing-layer Constraint——A Case Study in the Arid Regions in Northwest China

A risk map of natural disasters is an atlas to indicate the intensity of predicted disaster risk which may occur over next several decades in a region,and is the basis of regional risk management.Automatic map generalization is a complex decision-making process of expressing objective laws of geography,and also a hot and tough issue in disaster risk mapping.Researches on automatic map generalization of natural disaster risk mapping are insufficient at home and abroad,and the expression about the risk map is...