Cartograms serve as representations of geographical and abstract data,employing a value-by-area mapping technique.As a variant of the Dorling cartogram,the Demers cartogram utilizes squares instead of circles to repre...Cartograms serve as representations of geographical and abstract data,employing a value-by-area mapping technique.As a variant of the Dorling cartogram,the Demers cartogram utilizes squares instead of circles to represent regions.This alternative approach allows for a more intuitive comparison of regions,utilizing screen space more efficiently.However,a drawback of the Dorling cartogram and its variants lies in the potential displacement of regions from their original positions,ultimately compromising legibility,readability,and accuracy.To tackle this limitation,we propose a novel hybrid cartogram layout algorithm that incorporates topological elements,such as rivers,into Demers cartograms.The presence of rivers significantly impacts both the layout and visual appearance of the cartograms.Through a user study conducted on an Electronic Health Records(EHR)dataset,we evaluate the efficacy of the proposed hybrid layout algorithm.The obtained results illustrate that this approach successfully retains key aspects of the original cartogram while enhancing legibility,readability,and overall accuracy.展开更多
示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上...示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上,证明了算法的有效性。该算法可应用于格网统计数据示意地图制图。展开更多
WebGIS（Web-based geographic information system）政区四色地图主要为服务端静态瓦片,客户端不能动态修改样式,利用颜色模板设计四色地图动态制图方法,解决了全国3 000多个政区（包括省、市、县三级）四色地图客户端动态配色问题。...WebGIS（Web-based geographic information system）政区四色地图主要为服务端静态瓦片,客户端不能动态修改样式,利用颜色模板设计四色地图动态制图方法,解决了全国3 000多个政区（包括省、市、县三级）四色地图客户端动态配色问题。应用结果表明,这种客户端颜色模板方法可高效实现用户个性化四色地图动态制图。展开更多
示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上...示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上,证明了算法的有效性,可以将该算法应用于格网统计数据示意地图制图。展开更多
基金funded by the grant EP/S010238/2 from the En-gineering and Physical Sciences Research Council(EPSRC).
文摘Cartograms serve as representations of geographical and abstract data,employing a value-by-area mapping technique.As a variant of the Dorling cartogram,the Demers cartogram utilizes squares instead of circles to represent regions.This alternative approach allows for a more intuitive comparison of regions,utilizing screen space more efficiently.However,a drawback of the Dorling cartogram and its variants lies in the potential displacement of regions from their original positions,ultimately compromising legibility,readability,and accuracy.To tackle this limitation,we propose a novel hybrid cartogram layout algorithm that incorporates topological elements,such as rivers,into Demers cartograms.The presence of rivers significantly impacts both the layout and visual appearance of the cartograms.Through a user study conducted on an Electronic Health Records(EHR)dataset,we evaluate the efficacy of the proposed hybrid layout algorithm.The obtained results illustrate that this approach successfully retains key aspects of the original cartogram while enhancing legibility,readability,and overall accuracy.
文摘示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上,证明了算法的有效性。该算法可应用于格网统计数据示意地图制图。
文摘WebGIS（Web-based geographic information system）政区四色地图主要为服务端静态瓦片,客户端不能动态修改样式,利用颜色模板设计四色地图动态制图方法,解决了全国3 000多个政区（包括省、市、县三级）四色地图客户端动态配色问题。应用结果表明,这种客户端颜色模板方法可高效实现用户个性化四色地图动态制图。
文摘示意地图是统计数据可视化的一种新方法,但已有的面域示意地图制图算法不适用于局部数据差别大的应用。针对此问题,结合多尺度格网统计数据的尺度效应,修正了diffusion based method算法,并将该算法应用于北京市100m格网人口统计数据上,证明了算法的有效性,可以将该算法应用于格网统计数据示意地图制图。
