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From the current practices, it has been recognized that Internet GIS is one of the newest Internet applications and will become more and more popular and important in the future. However, since the new Internet services and applications have quite different requirements from those for which the Internet was originally designed and implemented thirty years ago, Internet GIS applications may be inaccessible if client users have severe network congestion or connect with very-low network bandwidth. This chapter discusses the issues of quality of services(QoS) in terms of Internet GIS, including performance, scalability, functionality, portability, and security, QoS has recently become the major research focus, especially for the next generation of Internet frameworks.

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Chapter 10 Quality of Service and Security issues in Distributed GIS

10.1 Introduction
10.2 Performance

      10.2.1 What's Performance?

      10.2.2 Client Performance

      10.2.3 Server Performance

      10.2.4 Networking Performance

      10.2.5 Overall System Performance

10.3 Service Reliability

      10.3.1 A Measure of Reliability - Availability

      10.3.2 Increasing A System's Availability

10.4 User Interactivity and Functionality Support
10.5 Portability
10.6 Security

      10.6.1 Security Issues in the Server

      10.6.2 Security Issues in the Client

      10.6.3 Security Issues in the Network - Eavesdropping

      10.6.4 The Implementation of Countermeasures

10.7 Conclusion

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  • eSECURITY Technologies Rolf Oppliger (
    eSECURITY Technologies Rolf Oppliger is a privately owned Swiss company that was founded in October 1999 to provide consulting, education, and engineering services related to information technology (IT) security. It provides services especially in risk management, cryptology, computer security, communication security and security-related applications and solutions. If you are interested, you can explore the publications and online books related to computer securities. In addition, it provides a relatively complete list of web resources for computer science and security.

  • Quality of Service (
    This is web resource page focusing on the Quality of Services. You can follow the multiple links to those websites that devote to the technologies and applications of quality of services.

  • Internet Performance Measurement and Analysis(IPMA) Project (
    The Internet Performance Measurement and Analysis (IPMA) project is a joint effort of Department of Electrical Engineering and Computer Science, University of Michigan and Merit Network. The project studies the performance of networks and networking protocols in local and wide-area networks. You can explore the methodology and analysis section of the website to get ideas of what are network and interdomain routing statistics at each of Network Access Points (NAPs) and how can these statistics help to evaluate the performance of NAP media, the stability of network service providers. It also provides links to other tools that can be used to track the statistics and visualize the performance of Internet. If you are interested, you are welcomed to explore the website of CAIDA, the Cooperative Association for Internet Data Analysis for related information. CAIDA provides tools and analyses promoting the engineering and maintenance of a robust, scalable global Internet infrastructure

  • RFC 2828 - Internet Security Glossary. R. Shirey. (
    This page is part of the RFC Hypertext Archive which is hosted by SunSITE is a noncommercial organization dedicated to hosting Open Source Software projects and mirrors. Information for the Internet community, especially the Internet Security Glossary is discussed in detail. It is a good site for the beginners as well as the professionals.

  • ITU-T Rec. X.800 (03/91) Security architecture for Open Systems Interconnection for CCITT Application, 1991.
    ( )
    This is the white paper prepared by study groups of CCITT (the International Telegraph and Telephone Consultative Committee), now is knowing as ITU-T (for Telecommunication Standardization Sector of the International Telecommunications Union), is the primary international body for fostering cooperative standards for telecommunications equipment and systems. The Recommendation X.800 describes the Reference Model for open systems interconnection (OSI) and establishes a framework for coordinating the development of existing and future. It was approved on the 22nd of March 1991.
    CCITT is a permanent organ of the International Telecommunication Union (ITU).

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