利用GPS观测技术建立独立坐标系的方法与实践

The Technique and Practice for Establishing Local Coordinate System Using GPS Technology

随着GPS静态测量技术的成熟使用,现在大部分的控制网均由GPS观测技术完成。本文研究了如何在控制点稀少或者控制点精度较低的地区,利用GPS观测,二维约束平差约束"一点、一方位、几条约束边长"的方法,建立高精度、满足工程投影变形的城市独立坐标系。本文具体讨论了建立独立坐标系的方法与案例,通过实践表明,利用GPS观测技术建立的独立坐标系,可以达到很高的精度和符合规范的边长投影变形。

With the use of static GPS measurement technology, most of the surveying control network completed by the GPS observa- tion techniques. This paper studies the methods of building high - precision, meet city engineering projection deformation independent coordinate system in the area of control point scarce and low accuracy, which using GPS baseline data and two - dimensional constraint adjustment with the ＂a point, an azimuth, a baseline＂ method. This paper also discussed the establishment of an independent coordi- nate system and case specific. By practice, the establishment of an independent coordinate system using GPS observation techniques, can achieve high accuracy and compliance side length projection deformation.