线路圆曲线的解算方法探讨

探讨一种数值求解圆曲线基本元素的通用方法。采用这一方法能以给定的任意两个基本元素,解算出圆曲线半径和两切线方向间的偏角。该方法计算简便、快捷,有较大的实用价值。     

Accurate algorithms to transform geocentric to geodetic coordinates

The problem of the transformation is reduced to solving of the equation $$2 sin (\psi - \Omega ) = c sin 2 \psi ,$$ where Ω = arctg[bz/(ar)], c = (a²?b²)/[(ar)²]^1/2 a andb are the semi-axes of the reference ellisoid, andz andr are the polar and equatorial, respectively, components of the position vector in the Cartesian system of coordinates. Then, the geodetic latitude is found as ?=arctg [(a/b tg ψ)], and the height above the ellipsoid as h = (r?a cos ψ)cos ψ + (z?b sin ψ)sin ψ. Two accurate closed solutions are proposed of which one is approximative in nature and the other is exact. They are shown to be superior to others, found in literature and in practice, in both or either accuracy and/or simplicity.     

普测绪论课讲解初探

结合本人十年来的教学实践和教学经验,讨论了绪论课对整个课本学习的影响,探讨一种能启发学生"自我思考"的教学方法.     

一种将数字地图转换成PDF文件的方法

介绍了一种将数字地图转化成PDF文件的方法,该方法以PostScript语言描述的地图符号库为基础,将数字地图用PostScript语言的操作符进行描述,生成PS文件,再用Acrobat Distiller将其转换成PDF文件.     

一种将数字地图转换成PDF文件的方法

介绍了一种将数字地图转化成PDF文件的方法 ,该方法以PostScript语言描述的地图符号库为基础 ,将数字地图用PostScript语言的操作符进行描述 ,生成PS文件 ,再用AcrobatDistiller将其转换成PDF文件。     

GPS-OEM原始数据向Rinex格式转换的方法

本文在介绍Rinex标准数据格式的基础上,以SuperStar GPS-OEM主板接收的二进制原始数据为例,详细介绍了利用VB6.0实现GPS主板原始数据向标准的Rinex数据格式的转换方法。该方法对不同类型的GPS(OEM)接收机原始数据处理具有指导意义。     

An alternative algebraic algorithm to transform Cartesian to geodetic coordinates

The algorithm to transform from 3D Cartesian to geodetic coordinates is obtained by solving the equation of the Lagrange parameter. Numerical experiments show that geodetic height can be recovered to 0.5 mm precision over the range from −6×10⁶ to 10¹⁰ m. Electronic Supplementary Material: Supplementary material is available in the online version of this article at     

Notes to Contributors

Contributions are welcomed on one of the following subjects or in related areas: ·GIS ·Geodynamic ·Physical geo-surveying ·GPS ·Geo-surveying ·Engineering surveying ·RS ·Photogrammmetry ·Mapping apparatus ·Cartology ·Graphics Paper submitted sh     

Notes to Contributors

Contributions are welcomed on one of thefollowing subjects or in related areas :·GIS·Geodynamic·Physical geo-surveying·GPS·Geo-surveying·Engineering surveying·RS·Photogrammmetry·Mapping apparatus·Cartology·GraphicsPaper submitted should be sent     

Notes to Contributors

Contributions are welcomed on one of the following subjects or in related areas: GIS Geodynamic Physical geo-surveying GPS Geo-surveying Engineering surveying RS Photogrammmetry Mapping apparatus Cartology GraphicsThe main text should be preceded by the abstract of no more than 300 words,