Establishment of special city GIS based on ArcObjects

Because of the complex operation and poor relevance to special use, current general GIS software cannot usually meet the need of setting up a special GIS. The ESRI product ArcGIS provides a set of COM components, called ArcObjects. Based on ArcObjects, a special GIS can be set up conveniently. To develop the management information system for Fuzhou's active faults, we use Visual Basic as our developing tool, which call ArcObjects, making good use of existing VBA codes. In this system, basic data and professional data are integrated for display, query, and analysis. With the 3D analysis components, flying animation can present city information in three-dimensional space. Besides, some professional analysis modules are implemented by advanced languages and can be easily embedded into the system. It is an excellent software environment for deep research of the active faults and urban planning. The results indicate that further development based on component object models (COM) can flexibly construct application systems and have good user interfaces.