摘要
针对未知空间参考系的大比例尺地形图测绘成果,通过数值模拟计算得到了各种参数对转换结果的影响,结果表明,三维四参数模型不适用于未知空间参考系的坐标转换,椭球参数对平面四参数转换结果的影响完全可以忽略不计。进而通过高斯投影长度变形公式与高斯投影公式得出了近似中央子午线的计算关系式,并用实际数据进行了算例验证,结果表明本文的方法可行。
Focusing on the coordinate transformation between an unknown spatial reference system and a certain coordinate system on the survey outputs of large-scale topographic map,the impact on transformation accuracy is testified by numerically simulating and calculating on various parameters.As a result,the Four-parameter 3D Transformation Model is not suitable for this kind of transformation while the Four-parameter Plane Model is superior.The influence of ellipsoid parameters on the latter is so small that totally can be ignored.Further to it,an approximate center meridian formular is deduced for the transformation based on the formulars of scale error of Gauss projection and Gauss projection.Finally,actual data are inputted to prove the feasibility of the preferred model.
出处
《地理空间信息》
2011年第5期74-77,165,共4页
Geospatial Information
关键词
未知空间参考系
坐标转换
中央子午线
椭球参数
Unknow Spatial Reference System
coordinate transformation
center meridian
ellipsoid parameter
