| 两种道路选取策略的比较研究 |
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| 引用本文： | 田晶,罗云,林镠鹏,任畅.两种道路选取策略的比较研究[J].武汉大学学报(信息科学版),2019,44(2):310-316. |
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| 作者姓名： | 田晶 罗云 林镠鹏 任畅 |
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| 作者单位： | 1.武汉大学资源与环境科学学院, 湖北 武汉, 430079 |
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| 基金项目： | 国家自然科学基金41701439武汉大学教学研究项目2017JG046 |
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| 摘 要： | 道路选取是根据比例尺的要求,在道路网中保留相对重要道路、舍弃相对次要道路的地图综合操作。从概念层和操作层对两种不同的道路选取策略进行了比较。一种是删除后更新策略,即删除一条道路后更新其他道路的重要度;另一种是删除后不更新策略,即删除一条道路后不更新其他道路的重要度。以常用的stroke重要度排序法为道路选取方法,运用长度、连通度、接近度和中介度的加权来描述道路的重要度,采用相似性、误删率、漏删率等定量指标以及定性的目视判别评价选取结果。以深圳市1∶1万道路网和1∶5万道路网作为研究数据进行了实验。理论上删除后更新策略优于删除后不更新策略,然而实证表明删除后不更新策略在常用定量评价指标上优于删除后更新策略,在定性评价方面则各有优劣。
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| 关 键 词： | 道路选取 删除后更新策略 删除后不更新策略 STROKE |
| 收稿时间： | 2018-09-05 |
A Comparative Study of Two Strategies of Road Network Selection |
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| TIAN Jing,LUO Yun,LIN Liupeng,REN Chang.A Comparative Study of Two Strategies of Road Network Selection[J].Geomatics and Information Science of Wuhan University,2019,44(2):310-316. |
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| Authors: | TIAN Jing LUO Yun LIN Liupeng REN Chang |
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| Institution: | 1.School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China2.Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China3.Key Laboratory of Digital Mapping and Land Information Application Engineering, NASG, Wuhan University, Wuhan 430079, China |
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| Abstract: | The road selection is a cartographic generalization operation to retain more important parts, or to omit the less important parts, of the linear features representing road network according to the cartographic scale requirement. Many researchers have paid much attention to the approaches to road network selection. This paper gives a comparative analysis of two selection strategies from conceptual and operational level. One strategy is to update the importance of the retained roads after eliminating one road and the other is not to update. The stroke ordering method is used as the road selection method, and length, connectivity, closeness, and betweenness are used to determine the importance of individual strokes. The selection results are evaluated by quantitative measures (including similarity, commission error and omission error), and qualitative visual inspection. The road network of Shenzhen city is used in the experiments. Theoretically, the update after dimination strategy is better than non-update strategy. Empirically, quantitative results shows that the non-update strategy is superior, while qualitative inspection shows that each strategy has its own advantages and disadvantages. |
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| Keywords: | road selection update after elimination strategy non-update after elimination strategy stroke |
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