Following a brief review on the development history of hydrography, the concept and methodology of precise hydrographic survey based on GPS technology is presented.

• 此外,人们对海道测量的产品种类和服务质量的要求也越来越高,无论是生产工艺、产品种类还是服务方式,传统海道测量都已经无法满足人们日益增长的需求。