Modeling Dynamic Networks in Temporal GIS and Realization Methods
Zhong‐Zhi Yang · Beijing Daxue Xuebao. Zirankexueban · 2012
A mathematic expression of dynamic network and dynamic link object which is the basic unit of dynamic network is introduced.Evolutions of dynamic link object are classified into three types which are geometrical evolution,topological evolution and life evolution.Modeling life evolution could express inheritance relationship between two dynamic link objects.Nine kinds of evolution events of dynamic link object are defined,they are New,Break from,Merge from,Die,Break into,Merge into,Deformation,Meet,Leave.A spatiotemporal data model of dynamic link object with consideration to geometrical,topological and life evolutions is established.This data model makes data operations and updates relatively easier.At last,the basic operators on dynamic link object are designed and integrity rules are raised.