GeoHemisphereBoundary
is a one-dimensional GeoGraphics primitive that represents the boundary line of a hemisphere of the Earth centered at the current geo location.
represents the boundary line of a hemisphere centered at the location loc.
Details
- The boundary of a hemisphere is a line contained on a plane that goes through the center of the Earth. Hence this line is a great ellipse.
- 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
open all close allBasic Examples (2)
Scope (2)
Properties & Relations (4)
GeoHemisphereBoundary[loc] is the boundary of GeoHemisphere[loc]:
DayNightTerminator[date] is equivalent to GeoHemisphereBoundary[loc] for the location having the Sun at its zenith at the given date:
This is the geo location that has the Sun at its zenith at that moment:
GeoHemisphereBoundary always represents a great ellipse:
Select some points on the hemisphere boundary and construct great ellipse segments among them:
These two curves exactly coincide:
GeoHemisphereBoundary is the limit of infinite height of GeoVisibleRegionBoundary:
Text
Wolfram Research (2015), GeoHemisphereBoundary, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html.
CMS
Wolfram Language. 2015. "GeoHemisphereBoundary." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html.
APA
Wolfram Language. (2015). GeoHemisphereBoundary. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/GeoHemisphereBoundary.html