Design And Research Of GIS Data Acquisition System Based On Online Public Space

With the development of the Internet,the geomatics industry has gained dramatic improvement.However,the way to collect spatial geographic information data still remain in a poor condition.The traditional way to collect spatial geographic information data requires much of manpower,material resources and time,which fails the expectation of the users.To solve this problem,the research proposed an innovative way based on the API of Baidu Map to collect the information online,which is full of important theoretical value and practical significance.The dissertation is based on the project of “Design and Research of GIS Data Acquisition System Based on Online Public Space” and the need of the geomatics industry for the spatial geographic information data,which discusses the storage structure of the spatial geographic information data of the portals’ electronic maps,designs an extensible structure of the spatial geographic information structure,and mainly studies the research,screening and rectification of the spatial geographic information data.This dissertation has designed an online public spatial geographic information data collection system to collect the data effectively.The dissertation analyzes three kinds of techniques of public spatial data rectification,which are control point rectification technique,rectification database technique and coordinate system transformation technique.By applying RMSE to the analysis of these techniques’ outcome,the RMSE value of the coordinate system transformation technique is the lowest,indicating that the coordinate system transformation technique may be the most suitable one for this research.By studying the relationship between GCJ-02 and BD-09 and the relationship between BD-09 and WGS-84,the conversion equation of them can be deduced respectively.Comparing to the traditional way to collect spatial geographic information data,the online public spatial geographic information data collection system can collect the relevant data effectively.And the coordinate system transformation technique can successfully transform the coordinate systems of different website geomatics information,making the same spatial geographic information data appearing in different maps possible.In this way,the users will be able to share and utilize these information data conveniently.In addition,the ways to collect spatial geographic information data mentioned in this dissertation can be used to collect various spatial geographic information.The dissertation realized the goals of collecting,rectifying and screening the online public spatial geographic information data,meeting the increasing demand of geomatics industry for building geographic information system such as the building of Youth Game Service System and “Sky Map,Fujian” basic database.