Geographic information system or geographic information system (GIS) is sometimes called "geographic information system" or "resource and environment information system". It is a specific and very important spatial information system. With the support of computer hardware and software system, it is a technical system that collects, stores, manages, calculates, analyzes, displays and describes the relevant geographical distribution data of the whole or part of the earth's surface space (including the atmosphere). Geographic Information System (GIS) deals with and manages all kinds of geospatial entity data and their relationships, including spatial positioning data, graphic data, remote sensing image data, attribute data and so on. It is used to analyze and deal with various phenomena and processes distributed in a certain geographical area, and to solve complex planning, decision-making and management problems.