面要素栅矢转换不确定性分析

在G IS应用过程中,往往需要进行栅格数据到矢量数据的转换。对于面状目标,在以往的研究中,忽略了栅格数据到矢量数据转换过程中存在的误差和不确定性。而在一些应用领域,这些误差和不确定性是不能忽略的。主要分析了栅格数据到矢量数据转换过程中的误差和不确定性来源以及传播。这些来源主要包括栅格数据本身的误差和不确定性,栅格数据处理过程中的误差和不确定性以及栅格到矢量数据转换模型本身的误差和不确定性。通过试验,以面目标的面积为指标分析了面状目标由栅格到矢量数据转换过程中的误差和不确定性。

Uncertainty in the Raster to Vector Data Conversion of Polygon Object

In GIS applications,we always need to make the conversion from raster data to vector data.For polygon object,in the pasted research of conversion,we mainly focused on the construction of algorithm method and how to make the conversion efficiently,and neglected the uncertainties in the raster to vector conversion.In some application fields,the uncertainties in the conversion could not be neglected.In this paper,we mainly focusedon the error and uncertainties analysis,propagation in the conversion.In the conversion,the uncertainties came from source data uncertainties,data processing uncertainties and algorithm model uncertainties.In the experimentation on conversion uncertainties,we analyzed the area.