| 基于改进Snake模型的道路网空间冲突处理 |
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| 引用本文： | 吴小芳,杜清运,胡月明,徐智勇.基于改进Snake模型的道路网空间冲突处理[J].测绘学报,2008,37(2):0-249. |
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| 作者姓名： | 吴小芳 杜清运 胡月明 徐智勇 |
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| 作者单位： | 华南农业大学信息学院,广东,广州,510642;武汉大学地理信息系统教育部重点实验室,湖北,武汉,430079;广州市市政园林局,广东,广州,510060 |
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| 基金项目： | 国家自然科学基金
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国土资源部信息中心项目 |
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| 摘 要： | 在对Snake模型研究分析的基础上，结合地图制图的需求，从3个方面对Snake模型进行改进：首先建立Snake模型中参数与道路曲线形态特征的关系，以更好地保持移位前后道路形态的相似性；其次控制Snake模型中外力的传播范围，以尽量保持要素位置的准确性；最后，通过道路交叉点的权重属性控制，保证移位后各交叉点的连通性以及道路的整体拓扑关系不发生变化。在此基础上，提出道路网移位整体思路，并采用改进的Snake模型对其进行移位，解决空间冲突。
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| 关 键 词： | Snake模型 制图综合 移位 |
| 文章编号： | 1001-1595(2008)02-0223-07 |
| 修稿时间： | 2007年3月2日 |
Disposal of Spatial Conflict between the Roads Networks Based on Improved Snake Model |
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| WU Xiao-fang,DU Qing-yun,HU Yue-ming,XU Zhi-yong.Disposal of Spatial Conflict between the Roads Networks Based on Improved Snake Model[J].Acta Geodaetica et Cartographica Sinica,2008,37(2):0-249. |
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| Authors: | WU Xiao-fang DU Qing-yun HU Yue-ming XU Zhi-yong |
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| Abstract: | Considering the diversification and complexity of spatial conflict between the roads networks in map,the Snake model is used to displace the road feature and dispose the conflict.Firstly,the thought and theory of Snake model is illustrated in detail.Then,according to the demand of cartography,the Snake model is improved as follows.Firstly the relationships between the parameters of Snake and shape character of road are built up in order to keep the shape of displaced road better.Then,the force propagation extent in Snake model is controlled to keep the accuracy of road position.Finally,the power attribute of intersect point between roads is set to control the displacement of the intersect point and keep the topological relation of roads.The general thought of disposing the spatial conflict of road networks are brought forward by using the improved Snake model.One experiment research is made in terms of the general thought,which represents that the roads are displaced and the spatial conflicts are solved well. |
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| Keywords: | Snake model cartographic generalization displacement |
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