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the research laboratory of the National Telecommunications and Information Administration

Institute for Telecommunication Sciences / Resources / Radio Propagation Software / Globe / GLOBE 1.0 Elevation Extraction Subroutines

GLOBE 1.0 Elevation Extraction Subroutines [FORTRAN]

This page provides access to Fortran source code to test extraction of the GLOBE Version 1.0 Elevation data base. The code is written in Fortran and requires modifications for your installation. PCs and UNIX handle binary data differently, and therefore a few lines of code need to be changed depending on the operating system.

It is assumed that the GLOBE Version 1.0 data base has been placed on your computer system.

Since PCs and UNIX use different directory separators (e.g. / vs \), you must be aware of that difference also.

No version has been supplied for the Mac OS®. The user is responsible for any modifications required for Mac systems.

These routines have been developed for GLOBE Version 1.0. This was a significant change from GLOBE Version 0.5.

You can obtain the GLOBE 1.0 data from the NOAA GLOBE web site. This site will allow you to download the Globe data free or you can order CDs containing the data. The data exists as 16 tiles and must be unzipped to be used. The unzipped 16 files will require about 2 GBytes [2000 MBytes] of disk storage.

The GLOBE extraction subroutines require that the file globe.dat reside in the same directory as the 16 GLOBE data files (tiles) that contain the elevation data. The globe.dat file contains the names of the 16 tile files.

See the GLOBEreadme file for a complete description of assembling the source code.

The GLOBE extraction software is available for download as a "zip" file. The download contains software developed by NTIA. NTIA does not make any warranty of any kind, express, implied or statutory, including, without limitation, the implied warranty of merchantability, fitness for a particular purpose, non-infringement and data accuracy. NTIA does not warrant or make any representations regarding the use of the software or the results thereof, including but not limited to the correctness, accuracy, reliability or usefulness of the software or the results. You can use, copy, modify, and redistribute the NTIA-developed software upon your acceptance of these terms and conditions and upon your express agreement to provide appropriate acknowledgments of NTIA's ownership of and development of the software by keeping this exact text present in any copied or derivative works. By clicking this link to download the software, you acknowledge that you have read the above disclaimer.

The zip package contains five files:

  • globe.f - main Fortran program to test the GLOBE extraction subroutines.
  • get_GLOBE_pfl.f - subroutine to extract a path profile from the GLOBE data base.
  • subsunix.f - GLOBE 1.0 extraction subroutines for UNIXsystems.
  • subspc.f - GLOBE 1.0 extraction subroutines for PCsystems.
  • globe.dat - data file with the names of the 16 tile files.

For more information contact Paul McKenna.