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Mathematica > Computable Data > Geographic Data > Geodesy >

Built-in Mathematica Symbol

GeoGridPosition

GeoGridPosition[{x, y, z}, projection]
represents a point {x, y, z} in a planimetric cartographic grid using the specified projection.

GeoGridPosition[pos, projection] converts from any geographic position to a grid point, essentially computing a cartographic projection. Any of the following coordinate types can be given: GeoPosition, GeoPositionXYZ, GeoPositionENU, GeoGridPosition.

	"proj"	named projection with default parameter values
	{"proj",₁,...}	projection with standard parallels specified
	{{"proj",...},{lat,long}}	projection centered on the specified position
	{proj,opts}	projection with detailed options specified

Default values of options for a particular named projection are given by GeoProjectionData[proj].

GeoGridPosition[{x, y}] represents a point {x, y} in a cartographic grid, assuming a standard ellipsoid height of zero.

GeoGridPosition[{x, y, z, t}] includes a time, given as a date t in decimal years.

Convert a geodetic position to a grid point using a spherical gnomonic projection:

Convert back to a geodetic position:

Compute a spherical gnomonic projection using a custom setting for the central meridian:

Compute a projection using explicitly specified projection parameters:

Convert a geodetic position to a grid point using a spherical gnomonic projection:

Convert back to a geodetic position:

Compute a spherical gnomonic projection using a custom setting for the central meridian:

Compute a projection using explicitly specified projection parameters:

Get latitude, longitude lists for the main boundaries of a country:

Convert geodetic coordinates to grid positions using the spherical Mercator projection:

Use the Cassini projection with central meridian -50 degrees: