摘要
[目的]等高线与河流之间的不一致性是地理空间数据库更新、维护中的常见问题,目前相关研究大多仅针对单线河,鲜少涉及双线河。鉴于此,提出了一种发掘形态特征的等高线与双线河之间的不一致性探测及处理方法。[方法]首先,通过DTW算法建立河流两侧岸线目标节点间的映射关系,并对其进行Morphing变换提取双线河中心线;然后,根据弯曲特征参数提取等高线山谷点,并依据DTW算法提取近似山谷线;接着,以双线河中心线为枢纽,建立山谷点与双线河、山谷线与双线河的综合判断规则来探测不一致区域;最后,运用等高线相似变换、河流移位与等高线协同变换,对不一致区域进行移位修正,并通过仿射变换处理局部等高线落水现象。[结果]本文选取3处不同地形区域进行实验,经修正后山谷点均位于双线河内部,山谷线与双线河间的平均路径差得到有效减小,其中经等高线相似变换结合协同变换修正后的整体平均路径差分别为2.417、0.033、2.783 m,经河流移位结合等高线协同变换修正后的整体平均路径差分别为2.667、0.057、0.042 m,均维持在一致性阈值范围内。[结论]本文通过充分发掘等高线与双线河的形态特征,实现了二者间的不一致性探测与处理,拓展了等高线与河流间的空间关系一致化研究范围,有助于推动多源地理空间数据的高质量集成与融合。
[Objectives]Inconsistencies between contour lines and rivers are a common challenge in updating and maintaining geospatial databases.Most existing studies focus on single-line rivers,with few addressing double-line rivers.To address this gap,this study proposes a method for detecting and resolving inconsistencies between contour lines and double-line rivers by analyzing their morphological features.[Methods]First,the DTW algorithm is used to establish a mapping relationship between the target nodes on both sides of the river's shoreline,and the Morphing transform is applied to extract the centerline of the double-line river.Second,contour valley points are identified based on bending feature parameters,and approximate valley lines are extracted using the DTW algorithm.Third,using the centerline of the double-line river as a reference,comprehensive judgment rules are established to assess inconsistencies between valley points and double-line rivers,as well as between valley lines and double-line rivers.Finally,the detected inconsistencies are corrected through contour transformation,river displacement,and contour collaborative transformation.Additionally,an affine transformation is applied to resolve cases where local contour lines fall into the water.[Results]This study conducts experiments in three different terrain areas.After correction,all valley points are positioned within the double-line river,and the average path difference between the valley line and the double-line river is significantly reduced.The overall average path differences corrected using contour similarity transformation combined with collaborative transformation are 2.417,0.033,and 2.783 m,respectively.The overall average path differences corrected using river displacement combined with contour collaborative transformation are 2.667,0.057,and 0.042 m,respectively,all of which remain within the consistency threshold.[Conclusions]This study thoroughly explores the morphological characteristics of contour lines and double-line rivers,enabling effective detection and correction of inconsistencies.By expanding the research scope of spatial relationship consistency between contour lines and rivers,this study contributes to the high-quality integration and fusion of multi-source geographic spatial data.
作者
赵彬彬
刘广
朱哲
谢建湘
ZHAO Binbin;LIU Guang;ZHU Zhe;XIE Jianxiang(College of Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Engineering Laboratory of Spatial Information Technology of Highway Geological Disaster Early Warning in Hunan Province(Changsha University of Science&Technology),Changsha 410114,China;Changsha Urban Planning Information Service Center,Changsha 410221,China)
出处
《地球信息科学学报》
北大核心
2025年第5期1129-1143,共15页
Journal of Geo-information Science
基金
国家自然科学基金项目(41301404)
长沙理工大学公路地质灾变预警空间信息技术湖南省工程实验室开放基金项目(kfj160603)。
关键词
双线河
中心线
山谷点
山谷线
不一致性
映射线
变换
double line river
center line
valley point
valley line
inconsistency
mapping line
transformation
