tableau Flow Maps流向地图 |
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Flow Maps
当事物或人从一个地点移动到另一个地点时,可以通过流向地图(Flow Maps)揭示出运动中的一些规律或现象。在tableau中使用makepoint和makeline函数则能生成流向地图。 1,创建以下数据源:可以复制到excel中,拆分成列; From,From (Latitude),From (Longitude),To,To (Latitude),To (Longitude) London,51.507351,-0.127758,Scotland,56.490669,-4.202646 London,51.507351,-0.127758,Wales,52.130661,-3.783712 London,51.507351,-0.127758,Spain,40.463669,-3.74922 London,51.507351,-0.127758,France,46.227638,2.213749 London,51.507351,-0.127758,Germany,51.165691,10.451526 London,51.507351,-0.127758,Belgium,50.503887,4.469936 London,51.507351,-0.127758,Netherlands,52.132633,5.291266 London,51.507351,-0.127758,Denmark,56.26392,9.501785 London,51.507351,-0.127758,Switzerland,46.818188,8.227512 London,51.507351,-0.127758,Italy,41.871941,12.56738 London,51.507351,-0.127758,Croatia,45.099998,15.2 London,51.507351,-0.127758,Slovenia,46.151241,14.995463 London,51.507351,-0.127758,Austria,47.516232,14.550072 London,51.507351,-0.127758,Czech Republic,49.817493,15.472962 London,51.507351,-0.127758,Poland,51.919437,19.145136 London,51.507351,-0.127758,Hungary,47.162495,19.503304 London,51.507351,-0.127758,Romania,45.943161,24.966761 London,51.507351,-0.127758,Greece,39.074207,21.824312 London,51.507351,-0.127758,Cyprus,35.126411,33.429859 London,51.507351,-0.127758,Turkey,38.963745,35.24332 London,51.507351,-0.127758,Finland,61.92411,25.748152 London,51.507351,-0.127758,Sweden,60.128162,18.643501 London,51.507351,-0.127758,Norway,60.472023,8.468946 London,51.507351,-0.127758,United States,37.09024,-95.712891 London,51.507351,-0.127758,Canada,56.130367,-106.346771 London,51.507351,-0.127758,Malaysia,4.210484,101.975769 London,51.507351,-0.127758,Singapore,1.352083,103.819839 London,51.507351,-0.127758,India,20.593683,78.962883 2,连接以上数据源,创建计算字段:起点MAKEPOINT(),终点MAKEPOINT(),路径MAKELINE() 双击【路径】生成流向地图,如2-1 2-13,以上函数仅2019.2以上版本支持。 |
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