New name for software that regrids data

A package of subroutines for transferring data between orthogonal grids has been renamed REGRIDPACK. This was first written in 1994 and called TLCPACK. The name change was made to more accurately reflect the purpose of the software. All the subroutine and test program files names have also been changed, but their argument lists remain the same.

The functionality of REGRIDPACK remains idential to the original TLCPACK. It still includes eight portable Fortran subroutine files for transferring values between four, three, two, and one dimensional arrays defined on uniform and nonuniform orthogonal grids. This is commonly referred to as "regridding." Linear or cubic interpolation can be selected independently in each direction. The REGRIDPACK subroutines were written to relieve users of the need to repeatedly reinvent the wheel in coding these relatively straightforward tasks. An effort was made to achieve code efficiency (especially vectorization). Fortran subroutines with complete documentation are included in the files. Test program files for each of the grid transfer subroutines are also available.

Note: The subroutines in REGRIDPACK cannot be used for extrapolation or to transfer values on nonorthogonal (randomly scattered) data grids.

Obtaining REGRIDPACK at NCAR

REGRIDPACK is installed on all of SCD's Cray computers, so that Cray users can link directly to the library. For example:

   f90 -L /usr/local/lib/ -l regridpack myprog.f

The Fortran source code, documentation, and test programs are also available via anonymous ftp from the machine ftp.ucar.edu in the directory path dsl/lib/regridpack:

ftp://ftp.ucar.edu/dsl/lib/regridpack/.

The overview file is named README.

If you have questions, please contact John Adams, johnad@ncar.ucar.edu.