Development And Application Of Geographical Network Analysis Component

With the development of GIS and GIS correlative subject ,the GIS application is more and more common in many areas. The useres raise a hight claim for the analysis of spatial location-relation and spatial correlation.Geographical network analysis is an important component of GIS spatial analysis,and has applied in many areas.To resolve the shortage of geographical network analysis is very usefull.Based on the analysis and research of current development of geographical network analysis,we summarize the limitation o f current research, and put forward making a geographical network analysis component with component technology, this method realizes geographical network analysis arithmetic and its values, improve the reuse of arithmetic.This method remedy MapX,MO etc GIS component's geographical network analysis functipn,it also can resolve requirements for short path analysis,locating and servering analysis, material flowing analysis and connectivity analysis,at the same time this method is a beneficial reference for other GIS component' design and realization.After mastered correlative theories and arithmetics,using COM technology, we realize a geographical network analysis component ,and apply it in system for flood material dispatch.The main content and work can be summarized as flows:1.Based on graph network model,we analysis and sum up geographical network analysis model and arithmetic, discuss the most important arithmetic-Dijkstra arithmetic and improve it.2. Under the environment of Visual C++ , using COM technology and geographical network analysis arithmetic ,we design and realize a geographical network analysis ActiveX Control.3. Using geographical network analysis component and MapX realize a flood material dispatch test sysytem.