The application of GPS in road construction

The application of GPS in road construction is mainly used to establish various road engineering control network and measure the control points, etc. Along with the rapid development of the highway, the survey technology, are putted forward a higher request. Due to long lines, less known points, therefore, it is not only difficult to net but also hard to meet the requirement of high precision with the conventional measure method .At present, China has gradually establish line head high precision control network using GPS technology, then head layout wire encryption by using conventional methods. Practice has proved that the point error is only 2 cm in the scope of a few tens of kilometers .And it reached the accuracy which conventional method cannot realize. At the same time, it is greatly ahead of time. GPS technology is also applied to the control measure of super-large bridge. Since it is unnecessary through visual and can reduce the intermediate links in the conventional method, so it is high speed and precision, with the obvious economic and social benefits.

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