Briefly introduces GPS technique, with example of setting up GPS control net in national highway 210 route, discusses the application of GPS technique in highway control surveying.
简单介绍GPS技术，结合在国道210线建立GPS控制网的实例，论述GPS技术在公路控制测量中的应用。
Combined with survey experience, the author probed into the methods of setting up ground control net with GPS and EDM lead for small hydropower projects based on the introduction of practice examples.
结合测量经验，探讨了用GPS与EDM导线建立小水电工程地面控制网的方法，并以实例加以介绍。
Combined with survey experience, the author probed into the methods of setting up ground control net with GPS and EDM lead for small hydropower projects based on the introduction of practice examples.
结合测量经验，探讨了用GPS与EDM导线建立小水电工程地面控制网的方法，并以实例加以介绍。
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