Routines (alphabetical) > Routines: H > HDF-EOS Routines > EOS_GD_PROJINFO

# EOS_GD_PROJINFO

This function retrieves the GCTP projection code, zone code, spheroid code and the projection parameters of the grid. For GCTP projection information, see the HDF-EOS User’s Guide, Volume 2: Reference Guide provided by NASA.

## Syntax

Result = EOS_GD_PROJINFO(gridID, projcode, zonecode, spherecode, projparm)

## Return Value

Returns SUCCEED(0) if successful and FAIL(–1) otherwise

## Arguments

### gridID

Grid id (long) returned by EOS_GD_CREATE or EOS_GD_ATTACH.

### projcode

A named variable that will contain the GCTP projection code (long).

### zonecode

A named variable that will contain the GCTP zone code used by UTM projection (long).

### spherecode

A named variable that will contain the GCTP spheroid code (long).

### projparm

A named variable that will contain the GCTP projection parameter array (double).

## Keywords

None

## Version History

5.2 | Introduced