GeoBoundary[g]
returns the boundary line of the geo region g.


GeoBoundary
GeoBoundary[g]
returns the boundary line of the geo region g.
Details

- GeoBoundary computes the 1D boundary geo primitive of a 2D geo region.
- The geo region g in GeoBoundary[g] can be given as any of the 2D geo primitives, like GeoDisk, GeoPolygon or GeoHemisphere.
- The result of GeoBoundary[g] can be any of the 1D geo primitives, like GeoCircle, GeoPath or GeoHemisphereBoundary.
Examples
open all close allScope (7)
The boundary of a Polygon[GeoPosition[…]] object is a Line[GeoPosition[…]] object:
The boundary of a GeoPolygon object of a given path type is a GeoPath object of the same type:
The boundary of a GeoDisk object is a GeoCircle primitive:
The boundary of a disk sector will have additional radial segments:
The boundary of a GeoHemisphere region is a GeoHemisphereBoundary object:
The boundary of a GeoVisibleRegion primitive is a GeoVisibleRegionBoundary object:
The boundary of a DayHemisphere or a NightHemisphere object is a DayNightTerminator line:
The boundary of a GeoBoundsRegion object is a GeoBoundsRegionBoundary primitive:
Properties & Relations (1)
GeoBoundary[GeoGroup[{g1,g2,…}]] is given by the geo group of boundaries GeoGroup[{GeoBoundary[g1],GeoBoundary[g2],…}]:
Tech Notes
Related Guides
History
Text
Wolfram Research (2020), GeoBoundary, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoBoundary.html.
CMS
Wolfram Language. 2020. "GeoBoundary." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/GeoBoundary.html.
APA
Wolfram Language. (2020). GeoBoundary. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/GeoBoundary.html
BibTeX
@misc{reference.wolfram_2025_geoboundary, author="Wolfram Research", title="{GeoBoundary}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/GeoBoundary.html}", note=[Accessed: 08-August-2025]}
BibLaTeX
@online{reference.wolfram_2025_geoboundary, organization={Wolfram Research}, title={GeoBoundary}, year={2020}, url={https://reference.wolfram.com/language/ref/GeoBoundary.html}, note=[Accessed: 08-August-2025]}