virtual MgCoordinateSystemGridBoundary* MgCoordinateSystemFactory::GridBoundary

(

MgPolygon *

boundary

)

[virtual]

Constructs a grid boundary object. Externally, grid objects are in viewport coordinates and define the extents of the region within which a grid is to be drawn. Such objects are often simple rectangles, but his is not a requirement.

Parameters:

boundary

The grid boundary in the form of a MgPolygon with no interior rings.

Returns:

Returns the boundary in the form used by the grid/graticule sub-system.

Exceptions:

MgOutOfMemoryException

Thrown in the event of heap memory allocation failure.

Remarks:

The boundary argument need not be a rectangle, but is assumed to be closed.