摘要
本文对空间数据多尺度表达中线状实体综合前后的形状相似性进行了描述、分析和研究。通过调查统计,得出了衡量线状实体形状相似程度的两个重要参量SIMⅠ、SIMⅡ,基于这两个参量给出了空间线状实体形状相似性的定义以及在不同尺度下线状实体形状相似性的度量方法,并用实例进行验证。为空间数据多尺度表达时线状实体的形状表达提供了一种分析和评价手段。
This paper focuses on the representation of shape similarity of linear objects before and after generalization in multiscale environment. After a statistical investigation, two important parameters for the description of shape similarity for linear objects are obtained, i. e SIM Ⅰ and SIM Ⅱ. The definition of shape similarity for spatial linear objects and the measurement method of shape similarity for spatial linear objects in different scales representation based on two parameters are presented. Then an example is given to validate the method. The means for analysis and evaluation of the presentation of the shapes of linear objects in multi-scale representation of spatial data is provided.
出处
《测绘科学》
CSCD
北大核心
2008年第6期83-85,共3页
Science of Surveying and Mapping
关键词
空间数据
多尺度
线状实体
形状相似
度量
spatial data
multi-scale representation
linear object
shape similarity
measurement
