MapWinGeoProc:SpatialReference

SpatialReference

Summary

Projects all points in a grid or shapefile from the original
coordinate system to a new coordinate system using Proj.4 (proj.dll).

Functions

ProjectGrid	Transforms a grid from one coordinate system to another.
FillGrid	Fills the result grid with values from the input grid.
ProjectGrid	Transforms a grid from one coordinate system to another. For large grids (>50MB) use the save-to-file version of this function.
GetUTMZone	Returns an appropriate UTM zone given a longitude in degrees.
ProjectShapefile	This function has 3 overloads.
Distance	Computes the distance between two values. Minimizes the chance of overflow by not taking the square of any number.
ConvertAndProjectPoint	Projects a 2D point from one coordinate system to another using Proj.4 function: pj_transform. This function assumes that the caller has already checked to see if conversion to radians or degrees is necessary, then performs the necessary conversion before or after projecting the point.
ProjectPoint	Projects a 2D point from one coordinate system to another using Proj.4 function: pj_transform.
FreeProjPointers	Releases memory used by the srcPrj and destPrj structures.
GetErrorMsg	Returns the error message associated with prj_transform.
InitializeGlobalVariables	Sets the global projection variables: srcPrj, destPrj, convertToRadians, and convertToDegrees.