道路网移位的Snakes模型参数设置方法研究  

Research on the Parameters Setting Method of Snakes Model for Displacement of Road Network

作　　者：刘远刚[1] 郭庆胜[2] 蔡永香[1] 柯西林 李绅弘 LIU Yuan-gang;GUO Qing-sheng;CAI Yong-xiang;KE Xi-lin;LI Shen- hong(School of Geoscience, Yangtze University , Wuhan 430100;School of Resource and Environment Science,Wuhan University ,Wuhan 430079;State Key Laboratory of Geoinformation Engineering , Xi'an 710054 , China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]武汉大学资源与环境科学学院,湖北武汉430079 [3]地理信息工程国家重点实验室,陕西西安710054

出　　处：《地理与地理信息科学》2017年第3期5-10,共6页Geography and Geo-Information Science

基　　金：国家自然科学基金面上项目(41471384);地理信息工程国家重点实验室开放基金课题(SKLGIE2016-Z-4-1);湖北省教育厅科学研究计划指导性项目(B2015448);长江大学大学生创新创业训练计划项目(2016010)

摘　　要：基于Snakes模型的移位算法是一种适合线状地图要素移位的全局最优化算法,该算法的移位效果在一定程度上依赖于Snakes模型形状参数(弹性参数α和刚性参数β)的设置,但目前仍缺少定量化的参数设置方法。为改善该算法的移位效果,该文提出了一种顾及道路要素等级属性和局部弯曲特征的Snakes模型形状参数优化设置方法。该方法分别建立了Snakes模型的形状参数与道路等级属性、道路内部各段弯曲曲率之间的定量关系,从而可在移位过程中更好地顾及道路要素的语义特征和图形特征。实验中,采用ArcGIS Engine二次开发实现了相应的道路网移位程序,并对某山区部分道路网进行移位处理,与原有算法相比,移位效果有所改善。The displacement algorithm based on Snakes model is a kind of global optimization algorithm that is suitable for thedisplacement of linear map features.The displacement effect of the algorithm depends on the setting of the shape parameters(elastic parameter Aand rigid pa rameter B)to some ex tent.However,there is still lack of quantitative par ameter setting appro ach.In order to improve the displacement effect,an approach to set the shape par ameters of Snakes model by co nsider ing the g radesand local bending character istics of road features is proposed.The quantitative relationship between the shape parameters androad grades,as well as the relatio nship between the shape par ameters and road segment bending character istics are established.Thus,the semantic characteristics and the graphical characteristics of the ro ad features are better taken into account in thepr ocess of displacement.In the experiment,the corr esponding pro gr am for displacement of road netw ork is dev eloped based onAr cGIS Engine components.As an example,a test map of road network in a mountainous area is processed.Compared with theor iginal algorithm,the displacement effect is impr oved.

关 键 词：SNAKES模型 地图综合 移位 道路网 形状参数 

分 类 号：P208[天文地球—地图制图学与地理信息工程]