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西安80坐标系与WGS—84坐标系转换模型的确定 总被引:10,自引:0,他引:10
根据GPS A、B级网中重合1980西安坐标系下的174个三角点成果,采用三、四、七参数转换模型,完成了我国80参心系与世界84地心系转换参数的计算与精度分析。 相似文献
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根据GPS-A、B级网中重合1980西安坐标系下的174个三角点成果,采用三、四、七参数转换模型,完成了我国80参心系与世界84地心系转换参数的计算与精度分析。 相似文献
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三维坐标转换一直是测量领域的一个重要内容。针对现有算法普遍存在的不适用大旋角转换、计算繁杂等缺点,从旋转矩阵的表达方式入手,提出了一种基于罗德里格矩阵的三维坐标转换方法。算例分析表明,文中方法无需线性化,计算简便,且能适用大旋角转换。 相似文献
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The similarity transformation model between different coordinate systems is not accurate enough to describe the discrepancy of them. Therefore, the coordinate transformation from the coordinate frame with poor accuracy to that with high accuracy cannot guarantee a high precision of transformation. In this paper, a combined method of similarity transformation and regressive approximating is presented. The local error accumulation and distortion are taken into consideration and the precision of coordinate system is improved by using the recommended method. 相似文献
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针对三维坐标转换模型参数估计的核心是旋转矩阵的表示方法这一客观事实,该文通过对现有三维坐标转换模型中不同旋转矩阵的表示方法进行研究,依据任何一个方阵都可以惟一地分解为一个对称矩阵与一个反对称矩阵之和的矩阵理论,提出了一种使用反对称矩阵表示旋转矩阵的新方法,并详细推导了基于布尔莎模型的三维坐标转换算法——平方根矩阵法;最后,根据文献算例对该方法进行实验分析。实验结果表明,该算法适用于大旋转角,且相较于方向余弦法、罗德里格矩阵法和单位四元数法具有计算收敛速度快、精确度高的优点。 相似文献
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The similarity transformation model between different coordinate systems is not accurate enough to describe the discrepancy of them.Therefore,the coordinate transformation from the coordinate frame with poor accuracy to that with high accuracy caanot guarantee a high precision of transformation.In this paper,a combined method of similarity tranformation and regressive approximating is presented.The local error accumulation and distortion are taken into consideration and the precision of coordinate system is improved by using the recommended method. 相似文献
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为了解决大旋转角三维坐标转换方法在误差方程基础上引入13未知参数(3个平移参数、1个尺度参数和旋转矩阵中9个元素)之间的虚拟观测方程存在无法准确定权和若虚拟观测方程作为约束条件引入时构成的约束条件法方程不可逆的问题,该文只建立旋转矩阵中9个元素之间的约束条件,提出了附有约束条件的大旋转角三维坐标转换方法。详细推导了该方法中未知参数(3个平移参数和1个尺度参数与旋转矩阵中9个元素)估计及其精度评定公式。最后用算例对该方法进行了验证。结果表明:该方法适用于任何角度旋转的空间直角坐标转换,其解算理论正确,模型严密,过程简单,易于程序设计。 相似文献
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YAO Jili WANG Shuguang SUN Yating 《地球空间信息科学学报》2006,9(2):84-88
IntroductionThree coordinate transformation models, Bursa-Wolf, Molodensky and WTUSM[1]are generallyused in 3D coordinate transformation. They are lin-ear models which have seven parametersΔX,ΔY,ΔZ,θ,,ψ[2]. Referecne [2] improved these line-ar mode 相似文献
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In this paper, a transformation model named SARC (static-filter adjustment with restricted condition) is presented, which is more practical and more rigorous in theory and fitting any angle of rotation parameter. The transformation procedure is divided into 4 steps: ¹ the original and object coordinates can be regarded as observations with errors: ² rigorous formula is firstly deduced in order to compute the first approximation of the transformation parameters by use of four common points and the transformation equation is linearized; ³ calculate the most probable values and variances of the seven transformation parameters by SARC model; {ie84-1} to demonstrate validity of SARC, an example is given. 相似文献