is an option for GeoGraphics that specifies the reference body or model for it for the purposes of geodetic computations and map drawing.
GeoModel
is an option for GeoGraphics that specifies the reference body or model for it for the purposes of geodetic computations and map drawing.
Details
- The following settings can be used:
-
Automatic use the "ITRF00" datum for the Earth"datum" any of the datums in GeodesyData ["Datum"]"ellipsoid" any of GeodesyData ["ReferenceEllipsoid"]{a,b} an explicit ellipsoid with semiaxes a≥br a sphere of radius rentity a planet or planetary moon Entity object
- The semiaxes lengths a, b in GeoModel{a,b} and the radius r in GeoModelr can be given either as numbers in meters or Quantity lengths.
Examples
open all close allBasic Examples (2)
Use the default (ellipsoidal) model of the Earth, where geodesics do not close:
Use a spherical model of the Earth, where geodesics close:
Use Mars as a reference model:
Use the Moon:
Applications (1)
Store the coordinates/sizes of the lunar maria:
Plot the maria together with their names (as tooltips):
Properties & Relations (2)
Show unclosed geodesics, which are one consequence of the nonsphericity of the Earth:
Compare with a spherical model:
Large disks accumulating around the antipodal point, using a spherical model of the Earth:
The default reference model is an ellipsoid:
Tech Notes
Related Guides
History
Text
Wolfram Research (2014), GeoModel, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoModel.html.
CMS
Wolfram Language. 2014. "GeoModel." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/GeoModel.html.
APA
Wolfram Language. (2014). GeoModel. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/GeoModel.html
BibTeX
@misc{reference.wolfram_2025_geomodel, author="Wolfram Research", title="{GeoModel}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/GeoModel.html}", note=[Accessed: 24-November-2025]}
BibLaTeX
@online{reference.wolfram_2025_geomodel, organization={Wolfram Research}, title={GeoModel}, year={2014}, url={https://reference.wolfram.com/language/ref/GeoModel.html}, note=[Accessed: 24-November-2025]}