GIS网络多媒体教学系统的设计与运行

为了适应21世纪课程教材《地理信息系统概论》的教学需要,以及该学科面向社会普及的发展趋势,南京大学在Authorware开发环境下完成了GIS网络多媒体教学系统的设计与实现,并通过ActiveX插件的形式将Authorware课件与前期建立的GIS教学网站有机地结合起来,形成面向网络的GIS多媒体教学系统。该系统将学生置于网络交互状态下,在仿真环境中了解并掌握GIS系统的基础知识、基本操作以及应用特色,最终实现GIS教学手段的现代化,达到提高GIS科技普及程度的目标。

Design and Implementation of GIS Network Multimedia Teaching System

GIS (Geographical Information System) is one of the computer systems that is applied to obtain, store, manage, analyse and display spatial data as well as for decision-making.It provides a new technique and study method to explore geographical environment.Today, GIS is used in many areas such as land use, resource regulation and city planning, etc.Along with the development of computer and internet technology, the speed of information spread is quickened and the diverse ways of spreading are available.The school education should be adjusted to adapt to the development, so as to bring forth the new network education technology which is based on computer and internet, combined with multimedia technology.In Nanjing University, the GIS network multimedia teaching system using the Authorware software and integrated it with the former GIS network teaching site using ActiveX plug-in has been realized.Our system leads students to an interactive net environment and let them study GIS basic knowledge, operation and its characteristic in the environment.By this means, the modernization of GIS education aims at popularization of GIS technology can be attained.Firstly, we analyzed the system demand and established its aim, function and content.Next we designed the main structure of the system, which includes the running condition of software and hardware and the whole frame of network teaching and Authorware courseware.We think that the proper operating system used in this teaching system should be Windows 2000 Server together with the Web Server IIS 4.0 and database system Access 2000.In order to make good use of this teaching system, the hardware system ought to be Pentium II and above, 128M memory, true color screen monitor with 800*600 resolution, sound blaster card, sound box and other multimedia equipments.To make connection between the GIS Authorware courseware system and the GIS course web site, the ActiveX control is applied.In the fourth section, we introduce the design details of our system including system implement scheme, the hierarchy and content organization of courseware system and designing of user browsing interface.The key technologies involved in it are shockwave knowledge flow using for browsing quickly in network, ActiveX control using for complex computation and human-computer interaction, design of demonstration of buffer analysis and ASP and HTTP using for searching function of GIS words database, etc.Finally, we conclude that our system is based on the working model which integrated Authorware courseware system with web net site system.The two systems can communicate with each other via plug-ins and form a system with full contents and running in high efficiency, so that we can get the aim that the contents and functions are complementary.