時空模型.ppt

* * The Space-Time Composite (STComposite) data model (Langran and Chrisman 1988, Langran 1992) improves the snapshot spatial data model by combining separate GIS layers representing different time points into a single STComposite GIS layer of all changes that have occurred over all time periods. Each record of the STComposite GIS layer represents the smallest geographic unit that experienced changes in history and is assigned with time stamps to keep track of its changes over time. ESTDM has several shortcomings. ESTDM is developed only for raster-based GIS. It might be insufficient to meet needs from applications requiring vector topology. Moreover, ESTDM relies on ADT programming for building the event lists. The integration of the event list with DBMSs needs sophisticated programming skills. * ESTDM has several shortcomings. ESTDM is developed only for raster-based GIS. It might be insufficient to meet needs from applications requiring vector topology. Moreover, ESTDM relies on ADT programming for building the event lists. The integration of the event list with DBMSs needs sophisticated programming skills. * * tuple time stamping and object time stamping (Steiner, 1998) Xiaohong Xin*, Shi-Lung Shaw**, Hui Lin* * * Joon Heo and Teresa M. Adams * * * * * * * * * * * * 時間尺度 時空資訊系統的建置 Linear time Time aggregation and decomposition Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. * 空間尺度 時空資訊系統的建置 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. * 時間與事件 時空資訊系統的建置 時間點事件 時間區間事件 進行中事件 未知時間起點的終止事件 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. * 時空變遷的描述 時空資訊系統的建置 圖徵變化型式 分割或合併 擴張或收縮 都市擴張、作戰地境線的變化 土地分割、合併 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. * 時空變遷的描述 時空資訊系統的建置 移動的圖徵事件及路徑 圖徵遷移 T0 T1 圖徵滅失 T0 T1 .tw/720vr/Template/ Eval