MapWinGeoProc:SpatialReference

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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.

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This page has been accessed 4,114 times. This page was last modified on 26 June 2006, at 19:20.