考虑地物构造的矢量数据不确定性描述

Uncertainty Description of Vector Data Based on Geographic Structure

总结了GIS矢量数据不确定性模型的研究现状.认为地理实体的确定性是地理实体在特定的时间尺度和空间尺度下的一种表现形式,在研究矢量数据不确定性时,把点、线作为地理实体的基元,建立矢量数据几何结构跟地理实体结构的语义关联.根据地理实体的几何构造,讨论了三类地理实体不确定性研究方法.针对第一类地理实体,从地理实体的几何构造出发分析地理实体的不确定性.针对第二类地理实体,提出了一种考虑模型误差的综合不确定性模型.

The development of uncertainty model of spatial vector data was summarized.The certainty of geographic feature is exhibition of geographic feature at special temporal scale and spatial scale,and the point and line were saw as the basic feature of geographic feature when researching the uncertainty of vector data,so the semantic conjunction between the vector data geometric structure and geographic feature structure was built.The geographic features were divided to three types by the geometric structure of them,and then the research methods of these three types were discussed.For the first type,the geometric structure should be taking into account when analyzing their uncertainty.For the second type,a new synthesis uncertainty model which integrates the error of model was brought forward.