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1.中国测绘科学研究院,北京,100036
2.武汉大学资源与环境科学学院,湖北 武汉,430079
3.西南交通大学地球科学与工程学院,四川 成都,610031
Received:19 March 2025,
Published:05 April 2026
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王勇,罗安,任福,等.志愿者矢量地图的比例尺多准则估算方法[J].武汉大学学报(信息科学版),2026,51(4):815-825.
WANG Yong,LUO An,REN Fu,et al.Multi-criteria Estimation Method for Scale of Volunteered Vector Maps[J].Geomatics and Information Science of Wuhan University,2026,51(4):815-825.
王勇,罗安,任福,等.志愿者矢量地图的比例尺多准则估算方法[J].武汉大学学报(信息科学版),2026,51(4):815-825. DOI:10.13203/j.whugis20240342
WANG Yong,LUO An,REN Fu,et al.Multi-criteria Estimation Method for Scale of Volunteered Vector Maps[J].Geomatics and Information Science of Wuhan University,2026,51(4):815-825. DOI:10.13203/j.whugis20240342
比例尺在志愿者矢量地图数据被用于多源空间数据融合时是非常重要的信息,因为比例尺差异大的空间数据在融合时易产生不一致性,会严重影响地图数据的融合质量及应用效果。因此,提出了一种基于三角形交互的消去与选择转法(elimination and choice translating reality with triangle interaction
Electre-tri)多准则决策模型的矢量地图比例尺自动估算方法。首先,分析了地理空间数据比例尺的评估参数,建立了8个空间尺度评估参数与矢量地图比例尺之间的映射关系;然后,基于Electre-tri多准则决策模型,根据偏好阈值、无差别阈值和否决阈值3类阈值动态设置,实现了待评估矢量地图与参考样本地图数据的关联计算;最后,通过不同策略准则方法实现了志愿者矢量地图的比例尺估算。为验证所提方法的有效性,以中国北京市开放街道地图的矢量地图为例,选择10个边界比例尺进行估算分析,结果表明,所提方法在志愿者矢量地图比例尺估算方面的实用性较强,模型参数的可操作性也强。
Objectives
2
The data scale is one of the key factors to be considered when integrating multi-source spatial data. Especially
when volunteered vector map data is involved in the multi-source spatial data integration
due to the lack of data scale information
it may lead to data inconsistency issues. This seriously affects the quality and applicability of the fused map data. How to automatically calculate the scale of the volunteer vector data is the key to improving the quality and application value of the fusion of volunteer vector data.
Methods
2
An automatic scale estimation method for vector maps based on the elimination and choice translating reality with triangle interaction (Electre-tri) multi-criteria decision model is proposed. This method mainly consists of three parts. First
by analyzing the scale evaluation parameters of geographic spatial data
we select eight typical spatial scale evaluation parameters
which include the shortest straight line segment length
the minimum bending area
the minimum size
the median side length
the vertex density
the number of spatial targets
the type of map elements
and the data capture source. And we also establish the mapping relationship between these evaluation parameters and the scale of vector maps. Then
we develop an Electre-tri multi-criteria decision-making model by combing the characteristics of the volunteer vector maps. Based on the decision model
we achieve the correlation calculation between the vector map data to be evaluated and the reference sample map data by dynamically setting three types of thresholds that are preference threshold
indifference threshold
and rejection threshold. Finally
by leveraging the correlation with the reference sample map data
the scale of the volunteer vector map can be estimated according to different strategy criteria methods.
Results
2
To verify the effectiveness of the proposed method
we select ten types of boundary scales of OpenStreetMap data in Beijing city
China as an example. The results indicate that the proposed method has strong practicability in estimating the scale of volunteer vector maps
with high operability of model parameters.
Conclusions
2
The proposed method provides an operable solution for automated scale estimation in volunteered vector maps
effectively supporting multi-source spatial data fusion by reducing scale-induced inconsistencies.
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