Research On Application Of Two-dimensional And Three-dimensional Map Based On MapServer

With the development of Internet technology,WebGIS(Geographic Information System based on Internet technology)has become an important direction of GIS development,and its application is more and more extensive,covering all areas of our lives.The interoperability of geospatial data sharing and geospatial data processing has always been the goal of GIS.How to use information resources more efficiently has extremely important significance for the development of society.The rapid development of open source WebGIS software in recent years and its own advantages and characteristics have provided a feasible path for some SMEs to establish their own WebGIS and publish map services.This paper aims at the current development of WebGIS technology,under the Internet environment,according to various standards and norms,how to achieve geographic information sharing and provide users with better GIS services and other issues.This article takes the open source WebGIS platform MapServer as an example,discusses how to build a map server and publish map service problems,and implements an efficient interactive two-dimensional map application system.The main research content of this paper is as follows:Summarizes the structural framework,implementation technology,development status of WebGIS,and the principles and methods of interactive dynamic network map design.It also compares the development methods of mainstream WebGIS.It studies the characteristics of WebGIS and OGC-based service framework and service specification.In-depth study of the open source WebGIS platform MapServer's architecture,working methods and technical characteristics,etc.,study the method of building a Web map server through MapServer,map slicing,publishing Web map services and other issues.The combination of MapServer and PostgreSQL,an open source database,completes the construction of a Web map server and enables the publishing of two-dimensional maps and three-dimensional map services based on this server.The principle and implementation of map slicing technology are studied.Mapcache and server are combined to implement map slicing and caching.The use of vs2010 development tools and Qt platform to achieve a desktop map client program,combined with the Web map server loading and displaying two-dimensional tile maps,combined with OSG and osgEarth to achieve the three-dimensional map display and interaction.This paper uses the open source WebGIS platform to realize the simple application of the second three-dimensional map.Compared with the system based on the WebGIS business platform,the system has lower cost,more extensibility,and easy to modify the bottom layer.It is more and more for some small and medium-sized enterprises at home and abroad.The simple and efficient issue of spatial information provides the basic ideas for resolution.