不同比例尺地图水系目标变化探测方法研究  

Change Classification and Detection of Hydrographic Objects from Maps of Different Scales

作　　者：王晓密[1] 赵彬彬[1,2] 邓敏[1] 彭东亮[1] 

机构地区：[1]中南大学地理信息系,湖南长沙410083 [2]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《地理与地理信息科学》2015年第6期25-29,34,F0002,共7页Geography and Geo-Information Science

基　　金：国家自然科学基金项目(41301404;41171351);湖南省自然科学基金项目(14JJ3083);数字制图与国土信息应用工程国家测绘局重点实验室开放研究基金项目(GCWD201103)

摘　　要：以水系数据为例,顾及不同比例尺地图中水系目标的不同维度表达,研究了表达同一地区不同比例尺地图间变化的分类、探测和判别规则。将不同比例尺地图水系目标变化类型归纳为出现、消失、延伸、收缩4种线状目标变化类型,以及出现、消失、旋转、收缩、扩张、移动、分裂、合并和先分裂后合并9种面状目标变化类型。考虑到不同比例尺地图中制图操作的影响,采用特定的判定规则区分出真实变化和制图综合算子作用,发展了不同比例尺地图水系目标变化的探测方法,给出了具体的变化类型判别流程。最后,对1∶2 000和1∶10 000水系数据进行了实验,结果表明水系数据变化探测效果良好,证明了该方法的合理性和有效性。Hydrographic object is one of the most important types of features in a map and has high influence on economic development. Therefore, the change detection of hydrographic objects is studied in this paper. In order to detect changes of hydrographic features in maps at different scales, first, related research on change classification for spatial objects is reviewed. Second, change types of hydrographic objects are classified into two categories which including 4 and 9 types, respectively： 1） for linear hydrographic objects： appear, disappear, lengthen and shorten; and 2） for areal hydrographic objects： appear, disappear, shrink, expand, move, rotate, split, unite, split and unite. Third, taking cartographic generalization into account, change type identification rules are adopted to distinguish real changes and cartographic generalization operation. Finally, two sets of hydrographic features at scale 1 ： 2 000 and 1 ： 10 000 respectively are used to verify the rules and methods for change type identification. Experimental results show the proposed approach is effective and accurate to detect changes of hydrographic features between different scale maps.

关 键 词：变化探测 尺度 现势性 水系目标 

分 类 号：P208[天文地球—地图制图学与地理信息工程]