Possibility Evaluation and Precision Verification on Car Navigation using e-GPS Technology

• Main Authors: Fu-Yu Yu, 游福裕
• Other Authors: 葉大綱
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/04848372097773566314

碩士 === 清雲科技大學 === 空間資訊與防災科技研究所 === 97 === The current study emphasizes on applying both static and dynamic methods in outdoor planning and surveying for data collection, processing and analysis assessment. The study is accomplished by using both Garmin vista and Leica ATX1230 instruments operating synchronically and simultaneously. The precision analysis includes two aspects: Firstly, apply static method in analysing the measured coordinates by both instruments and implement the internal precision statistical analysis, and also compare externally with the Trimble 5700 measured coordinates. Secondly, perform general road tests and highway tests using dynamical method by loading instruments in car. The collected positioning data coordinates are then used for similar precision statistical analysis. Through the comparison of both analysis results, we can then evaluate the positioning precision. According to the analysis results, it is shown that Leica ATX1230 performs better in positioning precision regardless of the different measuring methods. The analysis results using dynamical measuring method shows that the e-GPS positioning outperforms others with the horizontal precision 47cm and the elevation precision 116cm. In comparison, the horizontal precision/elevation precision of the respective DGPS and GPS are 66cm/194cm and 150cm/192cm. Even though the use of either e-GPS or DGPS is able to improve the precision in positioning, the existing possibility in obtaining large error still needs to be overcome before it can really be employed in the car navigation.