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GeoHemisphereBoundary[]

是一维 GeoGraphics 基元，表示以当前地理位置为中心的半球的边界线.

GeoHemisphereBoundary[loc]

表示以位置 loc 为中心的半球的边界线.

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GeoHemisphereBoundary

GeoHemisphereBoundary[]

是一维 GeoGraphics 基元，表示以当前地理位置为中心的半球的边界线.

GeoHemisphereBoundary[loc]

表示以位置 loc 为中心的半球的边界线.

更多信息

  • 半球的边界是包含在屏幕内的一条线，穿过地球中心. 因此，这条线是个大椭圆.
  • 位置 loc 可以指定为以度数为单位的纬度和经度坐标 {lat,lon}，如 GeoPosition[{lat, lon}]，或者已命名的实体 Entity[…].

范例

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基本范例  (2)

当前地理位置周围的半球的边界：

Wolfram Language code: GeoGraphics[{GeoHemisphereBoundary[], GeoMarker[]}]

在 Albers 投影中，以布宜诺斯艾利斯为中心的半球的边界：

Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[Entity["City", {"BuenosAires", "BuenosAires", "Argentina"}]], GeoProjection -> "Albers"]

范围  (2)

您当前所在地理位置周围的半球的边界：

Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[]]

以某些可能的方式知道，特定位置周围的半球的边界：

Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[{-45, 0}]]
Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[{Quantity[45, "AngularDegrees"], Quantity[0, "AngularDegrees"]}]]
Wolfram Language code: GeoGraphics[GeoHemisphereBoundary["15d 20m 32s N 34° 53' 24.5'' W"]]
Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[GeoPosition[{-50.245, 120.643}]]]
Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[Entity["City", {"Chicago", "Illinois", "UnitedStates"}]]]

属性和关系  (4)

GeoHemisphereBoundary[loc] 是 GeoHemisphere[loc] 的边界：

Wolfram Language code: GeoGraphics[{GeoHemisphere[], Red, GeoHemisphereBoundary[]}]

对于给定日期，太阳在天正中位置时，DayNightTerminator[date] 等价于 GeoHemisphereBoundary[loc]：

Wolfram Language code: date = Now
Wolfram Language code: GeoGraphics[DayNightTerminator[date]]

太阳在天正中时刻的地理位置：

Wolfram Language code: loc = GeoPosition[Reverse@SunPosition[date, CelestialSystem -> "Equatorial"] - {0, SiderealTime[GeoPosition[{0, 0}], date]}]
Wolfram Language code: GeoGraphics[GeoHemisphereBoundary[loc]]

GeoHemisphereBoundary 总是表示一个大椭圆：

Wolfram Language code: hb = GeoHemisphereBoundary[{40, 0}];

选择半球边界的某些点，并且构建它们之间的大椭圆：

Wolfram Language code: points = {{-50, 0}, {0, 90}, {50, 180}, {0, -90}, {-50, 0}}; ge = GeoPath[points, "GreatEllipse"];

这两条曲线恰好吻合：

Wolfram Language code: GeoGraphics[{ge, Red, hb}]

GeoHemisphereBoundary 是 GeoVisibleRegionBoundary 的无穷高度的极限：

Wolfram Language code: GeoGraphics[{Green, GeoHemisphereBoundary[{30, 50}], Red, Table[GeoVisibleRegionBoundary[{30, 50, h}], {h, {10 ^ 5, 10 ^ 6, 10 ^ 7, 10 ^ 8}}]}, GeoRange -> "World"]
Wolfram Research (2015)，GeoHemisphereBoundary，Wolfram 语言函数，https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html.

文本

Wolfram Research (2015)，GeoHemisphereBoundary，Wolfram 语言函数，https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html.

CMS

Wolfram 语言. 2015. "GeoHemisphereBoundary." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html.

APA

Wolfram 语言. (2015). GeoHemisphereBoundary. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html 年

BibTeX

@misc{reference.wolfram_2026_geohemisphereboundary, author="Wolfram Research", title="{GeoHemisphereBoundary}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html}", note=[Accessed: 01-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_geohemisphereboundary, organization={Wolfram Research}, title={GeoHemisphereBoundary}, year={2015}, url={https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html}, note=[Accessed: 01-November-2026]}