测绘学报 ›› 2026, Vol. 55 ›› Issue (9): 1695-1705.doi: 10.11947/j.AGCS.2026.20260139

• 地图学与地理信息 • 上一篇    下一篇

融合三维地形特征的图Transformer河网模式识别方法

柴润泽1,2,3(), 李精忠1,2,3(), 闫浩文1,2,3, 王小龙1,2,3, 刘振跃1,2,3, 王灵1,2,3   

  1. 1.兰州交通大学测绘与地理信息学院,甘肃 兰州 730070
    2.地理国情监测技术应用国家地方联合工程研究中心,甘肃 兰州 730070
    3.甘肃省测绘科学与技术重点实验室,甘肃 兰州 730070
  • 收稿日期:2026-04-13 修回日期:2026-08-14 出版日期:2026-10-28 发布日期:2026-10-28
  • 通讯作者: 李精忠 E-mail:12242158@stu.lzjtu.edu.cn;lilideyx@126.com
  • 作者简介:柴润泽(2002—),男,硕士生,主要研究方向为地图综合、智能制图。 E-mail:12242158@stu.lzjtu.edu.cn
  • 基金资助:
    国家自然科学基金(42394063; 42271454);甘肃省联合科研基金重大项目(24JRRA848);甘肃省委组织部重点人才项目(2025RCXM012);兰州市科技计划项目(2024-3-68);甘肃省优秀博士生项目(25JRRA214)

A graph Transformer method for river network pattern recognition incorporating three-dimensional terrain features

Runze Chai1,2,3(), Jingzhong Li1,2,3(), Haowen Yan1,2,3, Xiaolong Wang1,2,3, Zhenyue Liu1,2,3, Ling Wang1,2,3   

  1. 1.Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China
    2.National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, China
    3.Key Laboratory of Science and Technology in Surveying & Mapping, Gansu Province, Lanzhou 730070, China
  • Received:2026-04-13 Revised:2026-08-14 Online:2026-10-28 Published:2026-10-28
  • Contact: Jingzhong Li E-mail:12242158@stu.lzjtu.edu.cn;lilideyx@126.com
  • About author:Chai Runze (2002—), male, postgraduate, majors in map generalization and intelligent cartography. E-mail: 12242158@stu.lzjtu.edu.cn
  • Supported by:
    The National Natural Science Foundation of China(42394063; 42271454);Major Project of Gansu Provincial Joint Research Fund(24JRRA848);Key Talent Project of Gansu Provincial Organization Department(2025RCXM012);Lanzhou City Science and Technology Plan Project(2024-3-68);Gansu Province Excellent Doctoral Student Project(25JRRA214)

摘要:

本文提出一种融合三维地形特征的图Transformer河网模式识别方法。首先,基于河网矢量数据构建河段对偶图,将河段表示为图节点,河段间拓扑连接关系表示为图边;其次,在提取二维拓扑、几何形态特征的基础上引入高程差、坡度、比降三维地形特征,增强河段节点对地形背景的表达能力;然后,利用GraphSAGE对河段邻域进行采样与聚合,学习局部汇流关系及相邻河段间的形态与地形差异,并引入Transformer自注意力机制建模河网图中的全局结构依赖关系,实现局部邻域关系与整体空间结构模式的协同表征;最后,通过图分类实现树状、扇状、平行状、骨架状和格网状5类河网模式识别。试验结果表明,本文方法在5类河网模式识别上准确率达到95.36%,优于GCN、GraphSAGE和Transformer等方法。该方法可为河网空间结构表达、流域分类与水文过程模拟提供研究思路。

关键词: Transformer, GraphSAGE, 河网模式识别, 地形特征

Abstract:

This study proposes a graph Transformer method for river network pattern recognition incorporating three-dimensional terrain features. First, a dual graph is constructed from vector drainage network data, in which river segments are represented as graph nodes and the topological connections between river segments are represented as graph edges. Second, in addition to two-dimensional topological and geometric morphological features, three-dimensional terrain features, including elevation difference, slope, and channel gradient, are introduced to enhance the representation of the terrain context associated with river-segment nodes. Third, GraphSAGE is employed to sample and aggregate neighborhood information, thereby learning local confluence relationships as well as morphological and terrain differences between adjacent river segments. A Transformer-based self-attention mechanism is then introduced to model global structural dependencies within the drainage network graph, enabling the collaborative representation of local neighborhood relationships and overall spatial structural patterns. Finally, graph classification is performed to identify five drainage patterns: dendritic, fan-shaped, parallel, skeletal, and grid-like patterns. Experimental results show that the proposed method achieves an accuracy of 95.36% in recognizing the five drainage patterns, outperforming GCN, GraphSAGE, and the Transformer methods. The proposed method provides an approach to drainage network spatial structure representation, watershed classification, and hydrological process simulation.

Key words: Transformer, GraphSAGE, river network pattern recognition, terrain features

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