面状地图空间信息度量方法研究

A measurement approach for spatial information of area map

如何计算地图的空间信息含量是评价制图质量、地图综合算法以及实现空间信息有效传输的重要基础。本文在详细分析现有的空间信息度量方法的基础上,提出了一种度量面状地图空间信息的新方法。该方法分别从几何、专题、拓扑以及专题拓扑四个方面来度量地图空间信息。通过算例分析发现,本文方法便于定量计算和分析地图空间的信息量。

Measurement of geospatial information is the key factor for evaluating cartographic quality and generalization algorithm, and transferring to geospatial information. To develop a set of new measurements for geospatial information, this paper makes a critical examination of the existing approaches for geospatial information measurement. And then, a reclassification of contents of geospatial information is made from the consideration of geometric, thematic, topological and thematic topology. The corresponding measurements are further developed, including geometric information entropy, thematic information entropy, topological information entropy and thematic topological information entropy. It has been shown by an example that the proposed method in this paper could effectively measure the geospatial information.