OBJECT-ORIENTED ANALYSIS AND DESIGN CONCEPTS OF SPACE AND TIME Phần 6 pptx

... relative space- time view 14 2.7 Choosing the view for a GIS 16 2.8 Time geography 16 2.9 Time geography and GIS 19 2.10 Main elements of a space- time path 20 2.10.1 State as an element of the space- time ... 7 2 Concepts of space and time 9 2.1 The space- dominant view 9 2.2 The time- dominant view 11 2.3 The absolute space- time view 12 2.4 The relative...

... in space and time, i.e. the space- time path (relative space- time view). However, by having space and time as orthogonal dimensions, Time Geography requires the absolute view of space and time. ... between the absolute and relative views of space and time can be devised in GIS. Besides, the whole rationale of the Time Geography approach is the insepara...

... relationship OBJECT-ORIENTED ANALYSIS AND DESIGN 41 Snodgrass and Ahn (1985, 19 86) have also demonstrated the existence of a true orthogonality between transaction time and valid time which allows ... prospect of an object-oriented design method. His method improves the concepts of object orientation and their respective notations as a whole, overlapping with th...

... nearness of states and events on the space- time path of a lifespan of an entity. The demise circumstance characterises the closure of a space- time path. It can occur on the space- time path at any time ... chapter. OBJECT-ORIENTED DESIGN FOR TEMPORAL GIS 46 feasibility of applying object-oriented methods to the problem of handling space and time in GIS...

... examples of how space- time paths can be created by a user. The states and events designed in the STDM are visualised as edit menus within the system. This allows a better understanding of how space- time ... in Figure 6. 7 Execution of the evolution tracking scenario—stage 3 Figure 6. 9 Execution of the update scenario—stage 1 Figure 6. 10 Execution of the update scenari...

... data model capture the synergy between space and time of a space- time path in Time Geography. In terms of STDM, spatio-temporal data types offer the advantage of defining object classes with properties ... simultaneously defined in space and time (2D space, time) . An event in space and time can be defined as (point, point). Otherwise an event having a certain...

... logic 11 time 17 absolute time 11 cyclical time 13 dimension 38 timestamp 10 relative time 13, 16 user-defined data type 12 time change objects 42 Time Geography 5, 16, 19– 26 space- time path 16, 20–25 potential ... 61 methods 66 , 69 , 75, 76 overview 102 properties 66 , 72, 74, 77 scenarios 63 –77 version management 77 structural compatibility 36 sub-classing 37 su...