OBJECT-ORIENTED ANALYSIS AND DESIGN CONCEPTS OF SPACE AND TIME Phần 4 ppsx

... 0HB Phone: +44 (0) 116 252 3839 UK Fax: +44 (0) 116 252 38 54 Phone: +44 (0) 171 47 7 841 5 Email: pff1@le.ac.uk Fax: +44 (0) 171 47 7 85 84 UK Taylor & Francis, 11 New Fetter Lane, London EC4P 4EE USA ... an element of the space- time path 22 2.10.3 Episode as an element of the space- time path 24 2.10 .4 Evidence as an element of the space- time path 24 PREFACE xii...

Ngày tải lên: 08/08/2014, 00:23

... 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. ... representation). Space and time are joined in a single space- time path. Space and time are considered inseparable within a path, and it is the timing co...

Ngày tải lên: 08/08/2014, 00:23

... Correspondingly, valid time has been proposed for event time (Copeland and Maier, 19 84) , effective time (Ben-Zvi, 1982), logical time (Dadam, Lum and Werner, 19 84; Lum et al., 19 84) , state (Clifford and Warren, ... 19 94) . This provides a flexible and legitimate object-oriented model of an application in which analysis and design techniques have been integrated...

Ngày tải lên: 08/08/2014, 00:23

... the space- time path, not the space- time path itself. The historical view of the observer is reduced to the perception of nearness of states and events on the space- time path of a lifespan of an ... chapter. OBJECT-ORIENTED DESIGN FOR TEMPORAL GIS 46 feasibility of applying object-oriented methods to the problem of handling space and time in GIS. This...

Ngày tải lên: 08/08/2014, 00:23

... understanding of the STDM and the information stored in the database. 6.7 CONCLUSIONS This chapter has illustrated some examples of how space- time paths can be created by a user. The states and ... Demarcation classes. The origin of a space- time path in the VMDS can never be modified. In this example the origin of a space- time path is created once the properties of t...

Ngày tải lên: 08/08/2014, 00:23

... 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...

Ngày tải lên: 08/08/2014, 00:23

... 2 soil maps 35 space 17 absolute space 9 relative space 13, 16 space- time entity representation 5 space- time maps 14 space- time path 16, 20–5 configuration 21, 47 creation 58, 84 demise 61, 89 direction ... 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 G...

Ngày tải lên: 08/08/2014, 00:23