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GeoHemisphere[]

is a two-dimensional GeoGraphics primitive that represents the half of the Earth centered at your current geo location.

GeoHemisphere[loc]

represents the half of the Earth centered at the location loc.

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Scope  
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GeoHemisphere

GeoHemisphere[]

is a two-dimensional GeoGraphics primitive that represents the half of the Earth centered at your current geo location.

GeoHemisphere[loc]

represents the half of the Earth centered at the location loc.

Details

  • The boundary of the hemisphere is a line contained on a plane that goes through the center of the Earth.
  • The location loc can be specified as latitude and longitude coordinates {lat,lon} in degrees, as GeoPosition[{lat,lon}], or as named entities Entity[…].

Examples

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Basic Examples  (2)

The hemisphere around the current geo location:

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

The hemisphere centered at Buenos Aires, in the Albers projection:

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

Scope  (2)

The hemisphere around your current geo location:

Wolfram Language code: GeoGraphics[GeoHemisphere[]]

The hemisphere around a particular location, specified in several possible ways:

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

Properties & Relations  (4)

The boundary of GeoHemisphere[loc] is given by GeoHemisphereBoundary[loc]:

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

DayHemisphere[date] is equivalent to GeoHemisphere[loc] for the location having the Sun at its zenith at the given date:

Wolfram Language code: date = Now
Wolfram Language code: GeoGraphics[DayHemisphere[date], GeoRange -> "World"]

This is the geo location that has the Sun at its zenith at that moment:

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

NightHemisphere[date] is equivalent to GeoHemisphere[loc] for the antipode of the Sun position:

Wolfram Language code: GeoGraphics[NightHemisphere[], GeoRange -> "World"]
Wolfram Language code: antiloc = GeoAntipode[loc]
Wolfram Language code: GeoGraphics[GeoHemisphere[antiloc], GeoRange -> "World"]

GeoHemisphere is the limit of infinite height of GeoVisibleRegion:

Wolfram Language code: GeoGraphics[{Green, GeoHemisphere[{30, 50}], Red, Table[GeoVisibleRegion[{30, 50, h}], {h, {10 ^ 5, 10 ^ 6, 10 ^ 7, 10 ^ 8}}]}, GeoRange -> "World"]

The orthographic projection exactly shows a hemisphere of the Earth:

Wolfram Language code: With[{loc = Entity["City", {"Timbuktu", "Tombouctou", "Mali"}]}, GeoGraphics[{Red, GeoHemisphere[loc]}, GeoProjection -> "Orthographic", GeoCenter -> loc]]
Wolfram Research (2015), GeoHemisphere, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoHemisphere.html.

Text

Wolfram Research (2015), GeoHemisphere, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoHemisphere.html.

CMS

Wolfram Language. 2015. "GeoHemisphere." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/GeoHemisphere.html.

APA

Wolfram Language. (2015). GeoHemisphere. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/GeoHemisphere.html

BibTeX

@misc{reference.wolfram_2026_geohemisphere, author="Wolfram Research", title="{GeoHemisphere}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/GeoHemisphere.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_geohemisphere, organization={Wolfram Research}, title={GeoHemisphere}, year={2015}, url={https://reference.wolfram.com/language/ref/GeoHemisphere.html}, note=[Accessed: 13-June-2026]}