BUILT-IN MATHEMATICA SYMBOL

# GeoGridPosition

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

## DetailsDetails

• 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.
• Projections can be specified in the following forms:
•  "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
• Names of possible projections are given by .
• Default values of options for a particular named projection are given by GeoProjectionData[proj].
• GeoGridPosition[{x, y}] represents a point 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.

## ExamplesExamplesopen allclose all

### Basic Examples (3)Basic Examples (3)

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

 Out[1]=

Convert back to a geodetic position:

 Out[2]=

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

 Out[1]=

Compute a projection using explicitly specified projection parameters:

 Out[1]=