共查询到20条相似文献，搜索用时 140 毫秒
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一种实现西安80坐标系地形图向北京54坐标系快速转换的简易方法 总被引：1，自引：0，他引：1
本文针对GIS应用中经常遇到的西安80和北京54坐标之间的转换问题,提出了实现两种坐标系地形图相互转换的简易方法。首先利用MAPGIS软件自动生成西安80矢量标准图框,根据坐标改正参数,将西安80坐标系图框转换到北京54坐标系,再以它为参照基准,对地形图进行逐格网纠正,实现西安80坐标系地形图向北京54坐标系的转换。该方法操作简单,易于实现,非常适合于非测绘人员使用。 相似文献
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矿业权实地核查成果图件编制技术探讨 总被引：4，自引：0，他引：4
矿业权实地核查成果图件的编制是在完成野外实测后进行的最重要的成果处理过程之一。通过矿业权人提交的AutoCAD格式图件,详细阐述如何通过MapGIS的文件转换功能将其转换为MapGIS格式图件,并进行属性添加及管理。利用Coord坐标转换软件及MapGIS的误差校正实现了MapGIS格式图件从1954北京坐标系向1980西安坐标系的转换,并对结果进行精度分析。通过以上过程的处理,可以得到符合标准的矿业权核查成果图件。 相似文献
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在分析北京1954坐标系统与西安1980坐标系统特点的基础上,介绍了基于空间尺度为各向异性的三尺度坐标转换模型及其转换形式,以一种新的思路探讨了基于VC++编制的54坐标系的坐标转换至80坐标系的关键技术。本文基于兖矿发耳矿井测量数据,通过实例检验了这种转换算法,并进行了精度分析。 相似文献
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湖南省CGCS2000国家大地坐标系统转换方法 总被引：1，自引：0，他引：1
基于湖南省大地控制点布设现状、各等级控制点成果以及信息扩散估计理论,分析现有CGCS2000坐标成果和北京54、西安80两类坐标系建模共点的数据质量,为后续模型优选和模型质量保障奠定基础.在此基础上,研究各类大地坐标系统转换算法,实例计算各类算法的坐标转换结果,进行精度比较与分析,提出适宜于湖南省CGCS2000坐标系... 相似文献
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GPS测量得到的是WGS84坐标系下的坐标,而实际应用中较多使用的是北京54坐标,如何实现WGS84坐标系与北京54坐标系的转换,一直是GPS应用中的热点。本文详细介绍了GPS定位结果转换至北京54平面坐标系的两种坐标转换模型,并对实验结果进行了分析比较。 相似文献
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针对我国在国土测图、城市规划、工程设计等众多领域中北京54、西安80和国家2000等多种平面坐标系长期并存的现状,根据坐标系建立的原理提出了一种适用于北京54、西安80和国家2000等平面坐标系之间进行坐标转换的模型,在此基础上讨论常见的问题及其对转换结果的影响。结果证明,该模型进行平面坐标转换时控制点内符合精度优于1mm,可满足常见的各种工程应用需求;椭球参数对转换结果的影响在x方向可达42. 346m,在y 方向可达4.981m,故须选择正确的椭球;大地高对转换结果的影响在um级,故可以忽略该项误差。 相似文献
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坐标系统转换引起宗地面积变形分析 总被引：1，自引：1，他引：0
探讨了1954年北京坐标系和1980西安坐标系之间的转换方法.以实际项目为例,通过计算与分析,得出影响54、80坐标系统下面积变形的主要因素是坐标转换中的尺度因子. 相似文献
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J. C. Bhattacharji 《Journal of Geodesy》1973,47(1):65-72
The method of converting geodetic coordinates from a national geodetic reference system into the standard Earth on having
known the geodetic coordinates of at least one station in common with the considered systems, is described in detail; the
orientation of the Standard Earth at the initial station of the national geodetic reference system, is also determined side
by side. For illustration, use has been made of the known coordinates of the Baker-Nunn station at Naini Tal, in India, being
in common with the Indian Everest Spheroid and the Smithsonian Institution Standard Earth C7 system (Veis, 1967). The method advocated is likely to be more precise than the existing ones as it does not assume the parallelism
of axes of reference between the Standard Earth and the national geodetic reference systems which may not necessarily hold
good in actual practice. 相似文献
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目前的一些地心坐标向大地坐标的转换模型在计算速度,稳定性或精度方面存在一定的局限性。本文探讨了非线性方程组数值迭代的求解方法及其在MATLAB 7.0中的编程实现,并将结果与基于一元三次方程求解的严密方法做了比较分析,结果证明该方法是可以在实际中参考应用的。 相似文献
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H. Vermeille 《Journal of Geodesy》2002,76(8):451-454
The transformation from geocentric coordinates to geodetic coordinates is usually carried out by iteration. A closed-form
algebraic method is proposed, valid at any point on the globe and in space, including the poles, regardless of the value of
the ellipsoid's eccentricity.
Received: 14 August 2000 / Accepted: 26 June 2002 相似文献
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Is Newton's iteration faster than simple iteration for transformation between geocentric and geodetic coordinates? 总被引：2，自引：0，他引：2
Piotr Laskowski 《Journal of Geodesy》1991,65(1):14-17
Summary Two iterative algorithms for transformation from geocentric to geodetic coordinates are compared for numerical efficiency: the well known Bowring's algorithm of 1976, which employs the method of simple iteration, and the recent (1989) algorithm by Borkowski, which employs the Newton-Raphson method. The results of numerical tests suggest that the simple iteration method implemented in Bowring's algorithm executes approximately 30% faster than the Newton-Raphson method implemented in Borkowski's algorithm. Only two iterations of each algorithm are considered. Two iterations are sufficient to produce coordinates accurate to the comparable level of 1E-9 m, which exceeds the requirements of any practical application. Therefore, in the class of iterative methods, the classical Bowring's algorithm should be the method of choice. 相似文献
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Marcin Ligas 《Journal of Geodesy》2012,86(4):249-256
A new method of transforming Cartesian to geodetic (or planetographic) coordinates on a triaxial ellipsoid is presented. The
method is based on simple reasoning coming from essentials of vector calculus. The reasoning results in solving a nonlinear
system of equations for coordinates of the point being the projection of a point located outside or inside a triaxial ellipsoid
along the normal to the ellipsoid. The presented method has been compared to a vector method of Feltens (J Geod 83:129–137,
2009) who claims that no other methods are available in the literature. Generally, our method turns out to be more accurate, faster
and applicable to celestial bodies characterized by different geometric parameters. The presented method also fits to the
classical problem of converting Cartesian to geodetic coordinates on the ellipsoid of revolution. 相似文献
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GPS测量坐标转换实用性问题的分析 总被引：12，自引：0，他引：12
针对ＧＰＳ测量坐标转换方法中存在的问题,提出了强制符合平面四参数法和多项式拟合法,这两种方法能够有效的克服高程系统以及椭球参数不一致造成的误差,比较适合于工程自由坐标之间的转换;同时本文给出了基于“全球大地水准面的几何中心地球质心相重合”这一假设之上的莫洛金斯坐标转换法,该法不需要联测公共点即可将ＷＧＳ－８４坐标转换成本地局部坐标。上述几种方法减少了额外联测的工作量,提高了ＧＰＳ的使用效率。 相似文献
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Summary A new procedure for the transformation from geocentric to geodetic coordinates is introduced and analyzed. This new procedure which contains only one trigonometric function uses the Newton's iteration to solve the root of a non-linear equation. Compared with the well-known Bowring's iterative algorithm which uses a number of trigonometric functions, the new procedure is more efficient in computation. Numeric examples are used to test the two algorithms and the results show that the new procedure converges just as well as Bowring's algorithm but requires less time for completion. 相似文献
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The following topics are discussed in this paper: the geocentric coordinate system and its different realizations used in geodetic practice; the definition of a horizontal geodetic datum (reference ellipsoid) and its positioning and orientation with respect to the geocentric coordinate system; positions on a horizontal datum and errors inherent in the process of positioning; and distortions of geodetic networks referred to a horizontal datum. The problem of determining transformation parameters between a horizontal datum and the geocentric coordinate system from known positions is then analysed. It is often found necessary to transform positions from one horizontal datum to another. These transformations are normally accomplished through the geocentric coordinate system and they include the transformation parameters of the two datums as well as the representation of the respective network distortions. Problems encountered in putting these transformations together are pointed out. 相似文献
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Computing geodetic coordinates from geocentric coordinates 总被引：1，自引：1，他引：0
H. Vermeille 《Journal of Geodesy》2004,78(1-2):94-95
A closed-form algebraic method to transform geocentric coordinates to geodetic coordinates has previously been proposed. The validity domain of latitude and height formulae in the vicinity of the Earths core is specified. A new expression of longitude is proposed, excluding indetermination and sensitivity to round-off error around the ±180 degrees longitude discontinuity. 相似文献