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GeoModel

is an option for GeoGraphics that specifies the reference body or model for it for the purposes of geodetic computations and map drawing.

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Applications  
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GeoModel

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:
  • Automaticuse 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≥b
    ra sphere of radius r
    entitya 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

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Basic 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:

Wolfram Research (2014), GeoModel, Wolfram Language function, https://reference.wolfram.com/language/ref/GeoModel.html.

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: 15-August-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: 15-August-2025]}