Advantage of GPS surveying

Advantage of GPS surveying is it globality, efficiency, optimum accuracy, efficiency. Use in a geodesy, cartography, geography, land management, a ground cadastre, an agriculture, auto-, air-, sea navigation, in other spheres. Let out the receivers of positioning specially focused on data gathering for geographic (al) information system (GIS, spatial information system).
GPS measurement, GPS surveying - measurements by means of systems of satellite positioning with the purpose of definition of coordinates of a site of object in three-dimensional terrestrial space. In GPS they measure code or phase by methods of pseudo-range from the receiver of positioning up to 4 or greater number of satellites

GPS receivers, receivers are the electronic devices accepting signals of satellites with the purpose of positioning.
Receivers distinguish, from what satellite the signal is accepted, divide these signals, conduct tracking them, measure, and translate results in the digital form, preliminary them process, store and so forth.

On accuracy and costs GPS surveying has next features:
the most simple and cheap, code, mostly single-channel, with generators of low quality, low accuracy (one hundred and more than meters), capable to define only coordinates of discrete points; manual, average cost, code, rather small accuracy (unit and tens meters), having the small store of the data, supposing record of attributes of objects; the raised cost, the multichannel, code, having aerial and the generator of high quality adapted for measurements in a differential mode, providing meter accuracy; dear, multichannel, code-phase unifrequent or two-frequency, demanding the complex software, precision, allowing to measure with accuracy from several millimeters.