عنوان مقاله [English]
نویسنده [English]چکیده [English]
The Global Positioning System (GPS) currently has seven active satellites of block 2 and six satellites left over from the block, and provides the possibility of good geodetic positioning for several hours every day (with more precision than what is possible with today's surveying tools.). Since GPS does not require direct observation between stations, geodetic control points can be set at a fraction of the cost of traditional methods. It is interesting to know that in 1986, in the United States, winners of more than 600 tenders (calls for bids) to create control points have been companies with GPS receivers. For this reason, it is believed that having information on the cost of working with GPS can be useful for all the companies and institutions involved in surveying projects.