GeoVisibleRegion
GeoVisibleRegion[{lat,lon,h}]
is a two-dimensional GeoGraphics primitive that represents the region on the surface of the Earth visible from the point of coordinates lat,lon and height h above the reference ellipsoid.
GeoVisibleRegion[pos]
represents the region visible from the position pos.
Details

- GeoVisibleRegion assumes an ellipsoidal shape for the Earth and does not take into account the terrain elevation. Corrections for atmospheric refraction are not included.
- The angles lat,lon in GeoVisibleRegion[{lat,lon,h}] can be given as numeric objects in degrees, DMS strings, or Quantity angles.
- The height h in GeoVisibleRegion[{lat,lon,h}] can be given as a numeric amount of meters or as a Quantity length.
Examples
open allclose allBasic Examples (3)
Scope (3)
Visible region from a {lat,lon,h} position:
Smaller heights correspond to smaller visible regions:
For vanishing height, the visible region collapses to a point and default padding is used:
Specify the coordinates as Quantity objects:
Specify latitude and longitude as DMS strings:
Specify the viewing position as any type of geodetic position:
Move vertically 1 kilometer from New York, assuming the city is on the reference ellipsoid:
Applications (1)
Properties & Relations (3)
The boundary of a GeoVisibleRegion primitive is given by GeoVisibleRegionBoundary:
Position and height of the Willis Tower:
Show the region visible from the top of the building, assuming flat local terrain:
Horizon distance from elevation d, assuming a spherical Earth of radius :
Evaluate the formula for the height of the Willis Tower:
Compare a GeoCircle of that radius with the result of GeoVisibleRegion:
Text
Wolfram Research (2014), GeoVisibleRegion, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoVisibleRegion.html.
BibTeX
BibLaTeX
CMS
Wolfram Language. 2014. "GeoVisibleRegion." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/GeoVisibleRegion.html.
APA
Wolfram Language. (2014). GeoVisibleRegion. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/GeoVisibleRegion.html