公路选线中的嵌套山体自动提取技术研究

来源 :2017年世界交通运输大会 | 被引量 : 0次 | 上传用户:xiaohanhan52
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  地形地貌是影响公路选线的核心因素,考虑地貌实体单元的完整性在公路选线中具有重要意义。传统地貌类型的划分过分注重地貌单元的完整性,因而缺乏有效地地貌实体对象的自动提取方法。针对这一问题,以规则格网DEM 为数据源,利用数字地形分析中的地形特征、水系特征提取等相关技术,提出了一种地貌实体单元的自动提取方法,实现了对平原/山地的自动提取和嵌套山体界线的自动划分。该方法与结合专家知识的人工提取结果相吻合,较好的实现了山地与平原的自动划分和嵌套山体界线的提取。进而在公路初步选线的过程中考虑山体的完整性,相比于只考虑地貌微观因子的选线方法,得到了较好的结果。
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