一种线状位置文本描述的估算方法  

A Method of Georeferencing Linear Locality Descriptions

作　　者：黄亮[1] 朱欣焰[1,2] 呙维[1] 佘冰[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079 [2]武汉大学空天信息安全与可信计算教育部重点实验室,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2014年第4期481-485,共5页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2011AA010502;2013AA122301);国家科技支撑计划资助项目(2012BAH35B03);武汉科技计划资助项目(2013010501010146);测绘遥感信息工程国家重点实验室专项科研经费资助项目~~

摘　　要：当前大量空间数据的位置信息多采用文本描述而非地理坐标,导致地理信息系统无法对这些数据进行空间查询和分析,估算位置描述对应的地理坐标有助于提高空间数据的应用价值。针对已有方法在处理线状位置描述时缺少参考位置之间空间关系约束分析的不足,提出了一种线状位置文本描述的估算方法。在传统方法的基础上,顾及了局部空间走向计算线状特征在参考位置处的空间分布,并引入了模糊可见性概念模糊估算线状特征在参考位置之间的空间分布。实验结果表明,此方法能有效估算线状位置文本描述的空间分布范围。Massive spatial data are currently stored with textual locality descriptions but not geograph- ic coordinates. In geographic information systems, the lack of geographic coordinates makes these data difficult to query and analyze. Georeferencing of textual locality descriptions makes these data more valuable by allowing them to be used in spatial analyses. Existing methods do not analyze spatial con- straints between reference points in linear locality descriptions. This paper proposes a new method for georeferencing linear locality descriptions. On the basis of traditional method, local extent direction was employed to compute a probability distribution of linear locality at each reference point. Moreo- ver, fuzzy visibility concept was introduced to compute vague distributions of linear locality among reference points. Experimental results show that the proposed method is useful for georeferencing lin- ear locality descriptions.

关 键 词：线状位置描述估算 文本转换坐标 模糊可见性 

分 类 号：P208[天文地球—地图制图学与地理信息工程]