gives the value of the specified property for the specified cartographic projection.


gives the complete options for the default form of the specified projection.


  • GeoProjectionData[] gives the list of available cartographic projections.
  • GeoProjectionData["projection","Properties"] gives the names of all parameters and properties available for the projection specified by "name".
  • GeoProjectionData["projection"] returns a result of the form {"projection",{prop1->val1, }}, giving the default values vali of the parameters and properties propi. Common properties include:
  • "Centering"latitude and longitude defining the origin of the projection
    "CentralScaleFactor"scale factor at the central meridian or center of projection
    "GridOrigin"grid coordinates {e,n} of the central parallel and meridian
    "ReferenceModel"what reference sphere or ellipsoid to use
    "StandardParallels"standard parallel {ϕ} or parallels {ϕ1,ϕ2}
  • Typical settings for "Centering" include:
  • loncentral meridian
    {lat,lon} or GeoPosition[{lat,lon}]central parallel lat and meridian lon
    {{lat,lon},α}point on center line and azimuth (Oblique Mercator)
    {{lat1,lon1},{lat2,lon2}}two points on center line (Oblique Mercator)
  • Valid settings for "ReferenceModel":
  • rradius of reference sphere
    {a,b}semimajor and semiminor axis of reference ellipsoid
    {a,{invf}}semimajor axes and inverse flattening
    "name"name of the geodetic datum or reference ellipsoid
  • Naming-related properties include:
  • "AlternateNames"alternate English names
    "AlternateStandardNames"alternate standard Wolfram Language names
    "Name"English name
    "StandardName"standard Wolfram Language name
  • Available projections for a spherical reference model include:
  • "Aitoff"Aitoff modified azimuthal
    "Albers"Albers equal-area conic
    "AzimuthalEquidistant"azimuthal equidistant
    "BipolarObliqueConicConformal"bipolar oblique conic conformal
    "ConicEquidistant"conic equidistant
    "CylindricalEqualArea"cylindrical equal-area
    "CylindricalEquidistant"cylindrical equidistant
    "EckertI"Eckert I
    "EckertII"Eckert II
    "EckertIII"Eckert III
    "EckertIV"Eckert IV
    "EckertV"Eckert V
    "EckertVI"Eckert VI
    "Equirectangular"simple cylindrical equirectangular
    "GoodeHomolosine"Goode homolosine
    "Hammer"Hammer modified azimuthal equal-area
    "LambertAzimuthal"Lambert azimuthal equal-area
    "LambertConicConformal"Lambert conic conformal
    "LambertCylindrical"Lambert cylindrical
    "MillerCylindrical"Miller cylindrical
    "ObliqueMercator"oblique Mercator
    "TransverseMercator"transverse Mercator
    "AmericanPolyconic"American polyconic
    "TiltedPerspective"tilted perspective from a height with camera tilting angles
    "VanDerGrinten"Van der Grinten
    "VerticalPerspective"vertical perspective from a height
    "WagnerIX"Wagner IX
    "Wiechel"Wiechel equal-area
    "WinkelI"Winkel I
    "WinkelII"Winkel II
    "WinkelTripel"Winkel tripel
  • Available projections for an ellipsoidal reference model include:
  • "Albers"Albers equal-area conic
    "AzimuthalEquidistant"azimuthal equidistant
    "ConicEquidistant"conic equidistant
    "LambertConicConformal"Lambert conic conformal
    "LambertConicConformalNGS"Lambert conic conformal (NGS)
    "LambertCylindrical"Lambert cylindrical
    "ObliqueMercator"oblique Mercator
    "ObliqueMercatorNGS"oblique Mercator (NGS)
    "TransverseMercator"transverse Mercator
  • GeoProjectionData["Classes"] gives a list of all supported classes of projections.
  • GeoProjectionData["class"] lists all projections belonging to the given class.
  • GeoProjectionData["proj","Classes"] gives a list of all the classes of which projection "proj" is a member.
  • Classes of projections based on their properties include:
  • "Azimuthal"projections onto a tangent or secant plane
    "Conformal"projections preserving angles
    "Conic"projections onto a tangent or secant cone
    "Cylindrical"projections onto a tangent or secant cylinder
    "EqualArea"projections preserving areas
    "Equidistant"projections preserving some distances
    "Miscellaneous"other types of projections
    "ModifiedAzimuthal"variations of azimuthal projections
    "Perspective"projections based on geometric perspective
    "Polyconic"polyconic projections
    "PseudoConic"variations of conic projections
    "PseudoCylindrical"variations of cylindrical projections
    "Retroazimuthal"retroazimuthal projections
  • GeoProjectionData contains both general projections like "TransverseMercator" and explicit realizations of those general projections, like the members of the "UTMZone" family.
  • GeoProjectionData["Spherical"] gives the list of all projections that refer to a spherical model.
  • GeoProjectionData["Ellipsoidal"] gives the list of all projections that refer to an ellipsoidal model.
  • GeoProjectionData supports all projections used by the US State Plane Coordinate Systems from 1927 to 1983.
  • GeoProjectionData["SPCS27"] and GeoProjectionData["SPCS83"] give the names of all state plane zones.
  • GeoProjectionData["UTMZone"] gives names for all UTM zones, both North and South zones.
  • GeoProjectionData["UPSZone"] gives the names of the two UPS zones.
  • For any state plane, UTM zone, or UPS zone, GeoProjectionData["zone"] gives the name and the standard parameters of the projection used.
  • A geo projection proj can be used in GeoGridPosition[pos,proj] or in GeoGraphics[prims,GeoProjection->proj].


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Basic Examples  (4)

Default parameters used for the spherical Bonne projection, referenced to a unit sphere:

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Use a geo projection to convert a {lat,lon} location into map coordinates:

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Use a geo projection to produce a map of the world:

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Default parameters used for one of the UTM zones:

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Scope  (26)

Applications  (3)

Properties & Relations  (4)

Neat Examples  (1)

Introduced in 2008
Updated in 2014