GIS属性数据不确定性及其传播研究

Study on Attribute Data Uncertainty in GIS and Its Propagation

属性数据的不确定性直接影响地理信息系统(GIS)分析决策结果的准确性和可靠性。将GIS属性数据的整个生命周期分成数据采集与准备、数字化信息提取、信息综合和属性数据表达等阶段,研究属性数据不确定性在各阶段的传播,构造其传播模型,提出属性数据不确定性的合成算法与传播算法,实验结果验证了该模型的可用性与有效性。

Attribute data uncertainty can directly affect the quality of Geographic Information System（GIS）-based decision-making. The lifecycle of GIS attribute data is divided into a lot of stages, such as data collection and preparation, digital information extraction, information integration and the expression of attribute data. This paper explores the propagation of the attribute uncertainty at all stages and constructs propagation model of attribute uncertainty. It concludes synthesis and propagation algorithm of attribute uncertainty and tests the availability and effectiveness of the model.