GPS技术在枣庄市城市控制测量中的应用

Application of GPS Technology in City Controlling Surveying Measurement in Zaozhuang city

枣庄市城市控制测量项目采用现代大地测量的方法,利用D级GPS控制网作为测区首级控制网和精密水准点,选用20个点构成骨架网,按照GPS网的可靠性指标、精度指标、效率指标,进行优化设计;利用Trimble DINI12电子水准仪进行GPS四等水准联测,通过一定数量和分布均匀的GPS/水准点进行高程拟合。该项目了取得的成果精度,完全符合1∶500大比例尺测图的要求。

City controlling surveying measurement project in Zaozhuang city is carried out by using modem geodetic methods, using GPS network with D level as first controlling network, primary standards of precision and control network as GPS, and choosing 20 points to set up skeleton of network. In accordance with reliability indicators, ac- curacy indicators, efficiency indicators of GPS network, optimizing design is carried out as well. Four levels of GPS standards of measurement are carried out by using trimble DINI12 electronic level. Through the accuracy statistics, project achievements are analyzed and evaluated comprehensively. If height fitting is carried out by using a certain number of GPS standard fitting elevation points with uniform distribution, measurement accuracy with the four level will be gained.