多尺度下的不确定性空间方向锥形模型研究
Research on Cone-shaped Models of Cardinal Direction Relations Considering Positional Uncertainty of Multiple Spatial-scale Data
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摘要: 利用质心作为参考点,并在空间方向锥形模型中添加了扩展不确定度的参数,用区间分析法,对多尺度下顾及不确定性的空间方向关系进行形式化描述,来适应尺度变化引起的空间关系不确定性的变化,以更好地描述空间方向关系。该模型使得方向关系的划分上有个平滑的过渡区,在方向概念的表达上更符合人的认知。Abstract: Uncertainty of spatial data is variable accordingly when spatial scale changes,which impacts description of spatial relations.This paper develops uncertain cone models to describe cardinal directions considering uncertainty variety of spatial data because of scale change.Centriod is introduced as a reference point and expanded uncertainty parameter changed with variable scales is appended in cardinal direction relation cone-shaped model.Direction relations are formalized to adapt variety of cardinal directions because of scale transforming.The model partitions the direction relations with smooth transition regions,which accords with percipience on direction concept description.
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