介绍：

      "ArcObject is a large library of com components containing many hundreds of classes(恩，也许9.3以后上千...）.Forturnately,you can implement many common development tasks using a small subset of these classes.If you understand the..............."

      在《Exploring ArcObjects Vo1.1-Applications and cartography》一书中，对ArcObjects有以上的诠释。

      "ArcObjects is a framework that lets you create domain-specific components from other components. The ArcObjects components collaborate to serve every data management and map presentation function common to most GIS applications. ArcObjects provides an infrastructure for application customization that lets you concentrate on serving the specific needs of your clients."

     直接的理解就是ArcObjects是ESRI的“零件库”，由于基于com接口，在可扩展性、可移植性、二次开发上提供了各种支持。同时由于ArcGis产品线的更新拓展，ArcObjects体系越来越强大。逐步衍生出来更多的Arcgis产品，如下图所示：

     本专题将从零开始，一步一步学习ArcObjects的开发应用与拓展。