| GPS (Navigation Satellite Timing and Ranging Golbal Positioning System) is of properties for its high precision,quick speed for observations , cheapness and simplicity for its operation and so on. It' s widely used many areas including surveying and mapping. With the quick development of GPS,the new control ground surveying networks have been built on it,and it also exert very important influential effect in our country.Today,GPS has been used to built up the new control networks,to verify and improve the existed ones, or to strengthen the laters, and also be used to match the global or local geoids.Now it is used in many branches in our nation including the department of agriculture, foresty, national resources , city construction and so on.Some of the existed national control networks of different precision rate or local areas based on the traditional surveying methods have played an important role in our national lives at the large costs including manuals, fianances and materials. They are belongs to the precious of our nation and can not be replaced in recent years, and they widely recognized by many of our national branches and people.More and more ground control networks built on GPS, so it concerns unavoidably the relationships between GPS and the traditional ground control networks. One cannot replace the other with itself. So regarding the high relative precision of GPS-networks, to find a way to concord the relationship between them is the main task of this article, it requires to get one from the other without much loss of precision.This article have found a very useful way to resolve the problem with reference to the existed works which had been done by the others, applying the computer language C++ and the communal points whose coordinates are known and belonging to both networks , the programe edited by the author have fulfilled the main aspect of the task. I believe it is of some value to get more use in the factuality. |
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