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。
According to the HTTP standard, HTTP requests can use multiple request methods.
HTTP1.0 defines three request methods: GET , POST and HEAD method.
Six request methods have been added to HTTP1.1: OPTIONS 、 PUT 、 PATCH 、 DELETE 、 TRACE and CONNECT method.
Serial number | Method | Description |
|---|---|---|
1 |
| Requests the specified page information and returns the entity body. |
2 |
| Similar to a GET request, except that there is no specific content in the returned response, which is used to get the header |
3 |
| Submit data to the specified resource for processing requests (such as submitting a form or uploading a file). The data is contained in the requestbody. POST requests may result in the creation of new resources and / or modification of existing resources. |
4 |
| The data transferred from the client to the server replaces the contents of the specified document. |
5 |
| Request the server to delete the specified page. |
6 |
| The HTTP/1.1 protocol is reserved for proxy servers that can change connections to pipelines. |
7 |
| Allows clients to view the performance of the server. |
8 |
| Echo requests received by the server, mainly for testing or diagnostics. |
9 |
| It is a supplement to the PUT method and is used to locally update known resources. |