Application Of GPS Technology In The Surveying At Highway

The paper introduces types and forms of GPS, itsalignment datum as well as the conversion of coordinatesystem and coordinate datum.In the study of static GPS survey, the paper summarizesthe operating steps of devising and laying GPS controllingnet from the experience of practical surveying engineering. Itexpounds the designing standards, designing criteria,designing grades and net-controlling forms in highwaybaseline vector net. It also introduces the adjustment ofdatum settlement and GPS controlling net.In the study of dynamic GPS survey, the paperexpounds the possibility of dynamic survey applied into fieldwork, which will bring a better use of results from staticsurvey to collect the plane, vertical and transverse data ofhighway and provide the support of digital data for officework.