Research And Implementation Of WebGIS System Based On Node.JS And Open Source Technology

GIS is the product of the application and development of computer and information system technology in geography.Therefore,its development is not only promoted by GIS application and demand,but also influenced by computer and information science and technology The With the development of computer,network,database and other technologies and the deepening of application,the development of GIS technology presents new features and trends.Internet-based Web GIS is one of them.WebGIS is the product of Web technology applied to the development of GIS technology.It is an interactive,distributed and dynamic geographic information system.Web GIS is widely used in traditional government,environment and other government management fields,such as ease of use,openness and global nature,as well as navigation,disaster relief,LBS(location-based service),urban facilities management and people Life is closely related to the aspect.The rise and development of WebGIS,many GIS manufacturers have developed their own business WebGIS products such as ESRI's IMS product line,MapInfo's MapXtrme product line,SuperMap IS,Geo-Surf and so on.However,commercial WebGIS products due to the scalability is weak,the price is generally expensive,data and operation sharing difficulties and other difficult to meet the low cost and high customization needs.Based on open source software WebGIS because of its flexibility and low cost and other features more and more developers and companies attach importance to the emergence of many mature products.The development of the Internet and mobile terminals in general,the emergence of many social platforms and software,such as QQ,WeChat,BBS,Blog and so on.The need for people to communicate every day through these software and platform to record and share what happened around,produce a lot of data.Through the web crawler on the data acquisition and screening of access to many people and location-related information,and with the help of WebGIS system on the map can help residents understand what happened around for people's lives to facilitate.This article based on Node.js and open source technology to such a WebGIS system research and development.First of all,the development and application of Web and WebGIS are discussed.Secondly,the related technical support,network crawler,Node.js,open source software and system architecture are introduced.Finally,the system is designed in detail.And the system function of the display,to achieve a variety of data sources on the system display,the basic operation,Popup implementation and other functions.