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wgs84Ellipsoid

1984 年世界大地测量系统参考椭球体

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    语法

    E = wgs84Ellipsoid
    E = wgs84Ellipsoid(lengthUnit)

    说明

    E = wgs84Ellipsoid 为 1984 年世界大地测量系统 (WGS84) 参考椭球体创建一个 referenceEllipsoid 对象。默认情况下，半长轴和半短轴的长度单位为米。

    示例

    E = wgs84Ellipsoid(lengthUnit) 创建一个 WGS84 参考椭球体，其长度单位由 lengthUnit 指定。

    示例

    示例

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    打开实时脚本

    创建一个 WGS84 参考椭球体。默认情况下，半长轴和半短轴的单位为米。

    wgs84 = wgs84Ellipsoid
    wgs84 = 
referenceEllipsoid with defining properties:

                 Code: 7030
                 Name: 'WGS 84'
           LengthUnit: 'meter'
        SemimajorAxis: 6378137
        SemiminorAxis: 6356752.31424518
    InverseFlattening: 298.257223563
         Eccentricity: 0.0818191908426215

  and additional properties:

    Flattening
    ThirdFlattening
    MeanRadius
    SurfaceArea
    Volume

    显示表面积（单位：平方米）。

    wgs84.SurfaceArea
    ans = 
5.1007e+14
    打开实时脚本

    创建一个长度单位为公里的 WGS84 参考椭球体。

    wgs84km = wgs84Ellipsoid("kilometer")
    wgs84km = 
referenceEllipsoid with defining properties:

                 Code: 7030
                 Name: 'WGS 84'
           LengthUnit: 'kilometer'
        SemimajorAxis: 6378.137
        SemiminorAxis: 6356.75231424518
    InverseFlattening: 298.257223563
         Eccentricity: 0.0818191908426215

  and additional properties:

    Flattening
    ThirdFlattening
    MeanRadius
    SurfaceArea
    Volume

    显示表面积（单位：平方公里）。

    wgs84km.SurfaceArea
    ans = 
5.1007e+08

    输入参数

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    长度计量单位，指定为字符串标量或字符向量。您可以指定任何被 validateLengthUnit 函数接受的长度单位。

    值单位名称
    "m", "meter", "meters", "metre", "metres"米
    "cm", "centimeter", "centimeters", "centimetre", "centimetres"厘米
    "mm", "millimeter", "millimeters", "millimetre", "millimetres"毫米
    "micron", "microns"微米
    "km", "kilometer", "kilometers", "kilometre", "kilometers"公里
    "nm", "naut mi", "nautical mile", "nautical miles"海里
    "ft", "international ft", "foot", "international foot", "feet", "international feet"英尺
    "in", "inch", "inches"英寸
    "yd", "yds", "yard", "yards"码
    "mi", "mile", "miles", "international mile", "international miles"英里
    "sf", "survey ft", "US survey ft", "U.S. survey ft", "survey foot", "US survey foot", "U.S. survey foot", "survey feet", "US survey feet", "U.S. survey feet"美国测量英尺
    "sm", "survey mile", "survey miles", "statute mile", "statute miles", "US survey mile", "US survey miles", "U.S. survey mile(s)", "U.S. survey miles"美国测量英里（法定英里）
    "Clarke's foot", "Clarkes foot"克拉克英尺
    "German legal metre", "German legal meter"德国法定米制
    "Indian foot"印度英尺

    数据类型: char | string

    扩展功能

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    版本历史记录

    在 R2012a 中推出

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    另请参阅

    函数

    对象