Design And Development Of GNSS Data Acquisition Software Based On Android System

With the continuous improvement of Global Navigation Satellite System and the comprehensive networking of Beidou navigation and positioning system in China,GNSS positioning technology has been rapidly developed and applied with the trend of the times,especially in topographic survey,cadastral survey,road survey,power line survey,underwater topography survey and deformation monitoring.The commonly used measurement tool in the actual measurement work is the geodesic GNSS receiver with stable performance and complete functions.It has the characteristics of convenient carrying,simple operation and high efficiency.In recent years,with the development of RTK technology,CORS technology,error model,positioning algorithm and modern communication technology,the stability of the instrument has been improved,it has been greatly improved in hardware.However,the lack of software platform and function has seriously affected the application of satellite navigation positioning technology in the Surveying industry.Therefore,developing a good measurement software will improve the whole measurement industry It is also very important to the whole chains of surveying industrial.The current Field Data Acquisition software is based on Windows Mobile system and it has such questions,Small memory,poor expansibility,lack of function,difficult operation,bad data transmission and slow response.In view of above questions,this article proposes a solution which combines an Android Field Data Acquisition Software and GNSS receivers.To meet the needs of real-time map visualization and real-time drawing in current mapping software,a real-time operation method using online API map and CAD is proposed.In view of the questions in the current market,such as the lack of profession and unreasonable layout of the surveying and mapping software,the efficient operation of data exchange and the simplified operation method of functions are realized through the design of data analysis architecture,database layout,coordinate system optimization,measurement interface layout,etc.To sum up,by transplanting,integrating and innovating the software from windows mobile platform to Android platform,the old measurement function hasbeen sublimated on the new software platform.The optimization of the software in function innovation,overall design,interface layout and other aspects makes the measurement function have practical and beautiful features.Each function is fast,efficient and easy to operate.If it is put into engineering application,it will save a lot of working time,which has important practical significance for promoting the application of GNSS technology.