对空间数据不确定性研究的思考

Some Thoughts on Spatial Data Uncertainty in GIS

对GIS中空间数据不确定性研究中存在的问题进行思考后提出了5点建议。主要包括:1)要区分GIS中确定性目标和不确定性目标;2)要区分用离散点逼近曲线/曲面的逼近误差和离散点自身量测误差及其传播;3)要研究GIS中的几何不确定性,更要重视研究属性和时态不确定性;4)要研究空间数据质量,更要研究空间信息服务的质量;5)空间数据不确定性研究要努力向实际应用转化。

After thinking about spatial data uncertainty in GIS, the author proposed five suggestions about it, namely： 1） it was necessary to distinguish whether objects were uncertainty objects or not; 2） for the quality analysis of curve and surface, it was necessary to distinguish fitting errors and measurement errors of districted points; 3） for spatial data uncertainty study not only geometry, but also attributes （semantic） and temporal uncertainty could be considered carefully; 4） quality of service （QoS） was much more important than quality of data（QoD） in GIS quality control; 5） the study on spatial data uncertainty should be put forward to practical application.