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《Measurement & Control Technology》 2006-06
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Implementation of Key Technologies in GPS Field Data Collection System Based on Embedded GIS

PEI Ling,WANG Qing,WANG Hui-qing(Department of Intrument Science and Engineering,Southeast University,Nanjing 210096,China)  
A GPS-DA field data collection system based on embedded geographic information system(GIS) is developed.The serial port communication between GPS receiver and PDA is solved by the means,which combined multithreaded operation and event synchronization.The coordinate transformation between WGS84(world geodetic system 1984) and the GIS coordinates is discussed.The characters of embedded system are analyzed.A two-level and sixteen-grid data structure of embedded GIS is designed.Test results show that the GIS runs at higher speed and the problem of memory shortage in embedded system is solved by the data structure.The feasibility and reliability of these key technologies in the system are indicated by practical application.
【Fund】: 国土资源部“十五”重点科技项目(200210102);; 国家863计划“重大行业3S应用示范—国土资源”资助项目(2002AA134070);; 国土资源部科技专项计划项目(20050101)
【CateGory Index】: TP274.2;P228.4
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