【Abstract]This article introduces the development and evolution of the World Wide Web Geographic Information System and component technology, and analyzes the necessity and feasibility of using the component technology to build a World Wide Web Geographic Information System, this paper mainly analyzes the operating mechanism of component models in the World Wide Web Geographic Information System. The computer hardware technology and software industry have developed at an unprecedented speed, with significant and even brand-new changes in software design ideas, design methods, model establishment, and system integration. Especially since 1990s, software networking and component-based trends have brought new opportunities and challenges to the software industry. The World Wide Web will undoubtedly provide a very broad space for the survival of geographic information systems (GIS) and provide a more extensive application on the social stage. At the same time, how GIS adapts to the development of the World Wide Web technology and uses new technologies and methods to build a World Wide Web GIS that is compatible with the network technology will be a very important issue in the development of GIS. I. World Wide Web Internet is an open Wan that connects to the world. It complies with the "Transport Control and inter-network protocol" (TCP/IP ), the World Wide Web is a new technology developed on the basis of the Internet. Its communication protocol is hyper text transfer protocol ). Texts on the World Wide Web have special requirements: ① All texts must have a unique address called "Resource Locator" (URL. ② Text is a text specially constructed using hypertext markup language (HTML. ③ The text can contain hyper link ). A hyperjoin is a URL that embeds one or more other texts (images, sounds) into one text. Therefore, the Web browser can access the URL-based text on any computer on the Internet through a super connection. Ii. World Wide Web Geographic Information System The World Wide Web Geographic Information System is the implementation of geographic information systems on the World Wide Web. It is the transformation and development of traditional geographic information systems using the World Wide Web technology. At present, the World Wide Web Geographic Information System is still in the experimental research stage. Its ultimate goal is to realize the organic combination of GIS and WWW technology. GIS becomes a widely used technology and tool through www. Specifically, on any node of WWW, people can browse and retrieve various geographical information on the Web, perform various geospatial analysis and prediction, and perform spatial reasoning and decision-making. It can be seen that the World Wide Web Geographic Information System has the following characteristics compared with the traditional geographic information system: 1. strong adaptability. The World Wide Web Geographic Information System is based on the Internet and thus global. Moreover, the World Wide Web determines that the World Wide Web geographic information system can run on different platforms. 2. wide application. Because the network function will make the World Wide Web Geographic Information System more accepted by the society, so as to apply the World Wide Web Geographic Information System to extend the whole society, and truly realize the omnipotent and ubiquitous GIS. 3. Strong current potential. The World Wide Web Geographic Information System publishes information on the Internet and updates geographic information in real time. As a result, people can get the latest information and updates. 4. Maintain socialization. Data collection, input, and spatial information analysis and publishing will work under social coordination. Maintenance of the World Wide Web Geographic Information System will be socialized to reduce repetitive work. 5. Easy to use. Users of the World Wide Web Geographic Information System can directly obtain the required geographical information from the Internet. You can directly analyze various geographic information without worrying about the maintenance and management of the spatial database. |