Using ORDBMS to Store GIS Data

Based on the comparison of the main storage method used in current GIS, we think that the ORDBMS is a good choice for storing the GIS data. We have discussed the characteristics of a special ORDBMS Postgre-SQL, which include predefined space data type and operation and extensibility fordata and function, forthe storing and processing of GIS data.We have further discussed the extension of the Postgre-SQL following the standard of Open GIS, which involves amore complicated space data structure andmore functions.Moreover, we have extended to the discussion on the store of 3D GIS data applicable in the real world.At last, we discuss the extension for 3D GIS. We use simple complexes as the basic data model, define bounding box in the geometry feather and using the R-tree structure to improve searching proficiency.We also implement two kinds of important function in space manipulation, one is the determiner of the spatial relation between objects, the other is manipulation between two 3D bodies such as union, intersection and clipping.All the function is designed for the extension in server side using C or C+ +, and in the client side, we use JAVA language to get the space data from server.