最近几年来，地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持，如城市管理、区划、环境整治等等，地理信息成为信息时代重要的组成部分之一； “数字地球”概念的提出，更进一步推动了作为其技术支撑的GIS的发展。 与此同时，一些学者致力于相关的理论研究，如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面，并且这两个方面构成了相互促进的发展过程。
HTTP protocol generally refers to HTTP (Hypertext transfer Protocol).
Hypertext transfer Protocol (English: HyperText Transfer Protocol, abbreviation: HTTP) is an application layer protocol for distributed, collaborative and hypermedia information systems. It is the most widely usednetwork transfer protocol on the Internet. All WWW files must comply with this standard.
HTTP is designed for communication between Web browsers and Web servers, butcan also be used for other purposes.
HTTP is a communication protocol based on TCP/IP to transfer data (HTML files, picture files, query results, etc.). HTTP introduction This chapter introduces the HTTP protocol. HTTP message structure This chapter introduces the structure of HTTP messages. HTTP method This chapter introduces the methods of HTTP, including GET, POST, HEAD and so on. HTTP header information This section introduces the header information of HTTP HTTP status code This section lists the status codes for all HTTP. 12.1.1. Content list ¶