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Modeling and Visualizing Historical GIS Data Spatio-Temporal Workshop Harvard University 10 April 2009 Lex Berman China Historical GIS Project What is Historical GIS? • geographic scope • temporal range • level of detail • data model Polygon compilation process Painstakingly Slow! Polygons vs. Networks Datestamping of Arc Segments Spatio-temporal Composite Spatial Fragmentation! Temporal Change Tables Asynchronous Changes Administrative Hierarchy Nodes + Relationships Nanjing 南京 Zhongdu 中都 Beijing 北京 Networks + Clustering Image: Corina Graif Enclosures and Overlaps Networks + Spatial Analysis Plum Pudding in Danger Network Model for Spatio-Temporal Visualization Proof of Concept: Fujian Province GoogleEarth KML: teKML (time enabled KML) Time Animation Test in GoogleEarth: Sui Dynasty Visualization of Node to Node Movements • nodes of presence • target locations • paths of movement • cumulative trail of movement Visualization of Node to Node Movements Spatio-Temporal Model Node Features Relationships Specific Periods Areal Units Post-Processing China Historical GIS Project http://www.fas.harvard.edu/~chgis
