地矿测绘
地礦測繪
지광측회
SURVEYING AND MAPPING OF GEOLOGY AND MINERAL RESOURCES
2014年
4期
25-28
,共4页
坐标转换%4 参数%7 参数%转换精度
坐標轉換%4 參數%7 參數%轉換精度
좌표전환%4 삼수%7 삼수%전환정도
coordinate transformation%four parameters%seven parameters%transformation accuracy
转换精度是在不同坐标系统转换时关系工程应用的关键因素。文章用曹妃甸工业区同期控制点的两套已知坐标数据，利用4参数、7参数的转换模型对求解参数时选用公共点的位置与精度因素对 WGS －84坐标系到唐山城市坐标系平面坐标转换精度的影响进行了实例分析，在此基础上得出了一些有益的结论。
轉換精度是在不同坐標繫統轉換時關繫工程應用的關鍵因素。文章用曹妃甸工業區同期控製點的兩套已知坐標數據，利用4參數、7參數的轉換模型對求解參數時選用公共點的位置與精度因素對 WGS －84坐標繫到唐山城市坐標繫平麵坐標轉換精度的影響進行瞭實例分析，在此基礎上得齣瞭一些有益的結論。
전환정도시재불동좌표계통전환시관계공정응용적관건인소。문장용조비전공업구동기공제점적량투이지좌표수거，이용4삼수、7삼수적전환모형대구해삼수시선용공공점적위치여정도인소대 WGS －84좌표계도당산성시좌표계평면좌표전환정도적영향진행료실례분석，재차기출상득출료일사유익적결론。
Conversion accuracy is the key factor associated with the engineering applications in different coordinate system transformation.By means of the two sets of control point coordinate data in the same period in Caofeidian industrial zone,using the transformation models of both the four parameters and seven parameters,and taking the transformation from WGS-84 coordinate system to Tangshan city plan coordinate system for an example,this paper analyzed the effect of the accuracy factors and the selected position of common point for solving the parameters on the plan coordinate transfor-mation accuracy.On this basis,some useful conclusions have been drawn.
