Subsequent Development Of Small Geographic Information System

Along with more and more researches on Geography Information System (GIS), the implement fields of GIS are extending. The geography information data amount is increasing in a rapid speed. How to organize and manage the spatial data and the property data more efficiently has already to be a vital part of GIS that should not be ignored. Most of the traditional GIS software uses the document mode to manage and store the data which need more efficient way to deal with for the rapidly increasing amount.This paper is about the subsequent development of a small GIS platform The key tasks are to add the subsystems of database management and property data management. This platform takes the Microsoft Visual C++ and SQL Sever database as the development environment. With the proper construction design and map layers management mode, the subsystem of database management establishes a database model. Instead of the old document management mode based on local disk, it realizes the function of managing both of the spatial data and the property data in the same outside database. After the combination of the AutoGIS and the SQL Sever, it makes the use of the RDMS to store and identify the spatial data with the topology structure, and founds the R-Tree index for spatial data to improve the search efficiency. Meanwhile, users could directly operate on the database tables and the records within AutoGIS. As for the property data stored in local files, the subsystem of property data management realizes the functions that tables creation, reservation, display and edit of the property data with the virtual list technology. In addition, for the realization of the mutual search between spatial data and the property data, it establishes the index construction based on B~+-Tree.After this subsequent development, data management capability of AutoGIS is enforced, and the data analysis ability is improved. With the Microsoft Visual C++ development environment and the special figures of GIS data, this paper introduces the RDMS mechanism into the AutoGIS to improve the data security and portability.