Research Of Key Technology Based On GIS Spatial Analysis

Spatial analysis is the analytical technique of geographical data. At a word, spatial analysis is the kernel and soul of Geographical Information System (GIS). And it is one of the key symbols in which GIS is different from the generic information systems or electronic map systems. Spatial analysis could be categoried as follows:(1) the analysis and operations based on the spatial graghical data;(2) the operations based on the data which are not part of the collections of spatial attribute;(3) the combine operations of the spatial data and the non-spatial data.This paper studies two very important analytical techniques in the Spatial Analysis, i.e., the techniques of spatial topology analysis and shortest path analysis in GIS.Firstly, we have implemented a spatial topology analysis model which based on topological graph according to the definition of the DE9-IM (Dimension extended 9 Intersection Matrix) in SFS (Simple Feature Specialization) and in .NET platform. It is true that this model could describe the topological relationships of spatial planar geometries exactly through doing the tests.Secondly, I study and test the key techniques of shortest path analysis, then put forward a practical and efficient realization of shortest path analysis according to the characteristics of city road network, and implement an experimental system. In the research course, I set focus on solutions which include the abstraction and construction of the topological structure of network, and the efficient implementation of shortest path algorithm.At last, I implement an archetypal system which could realize drawing map, managing the spatial data and carrying out parts of functions of spatial analysis by using the techniques of rendering the map and Spatial database.