DGGRID Software

DGGRID is a public domain software program for manipulating ISEA DGGs. Currently DGGRID can generate DGGs (whole earth or for user-selected regions), perform address conversions, bin point values into DGGs, and perform presence/absence binning into DGGs.

From this page you can download source code or selected binaries. Before downloading please review our Terms of Use.

DGGRID release history. The current release is version 4.3b.
DGGRID Documentation in pdf format (note that version 3.1 documentation still applies to DGGRID version 4.3).
DGGRID examples with meta-files, data-files, and sample output as a tar'd and Unix compressed file.
Download source code. Complete DGGRID source code, as a tar'd and Unix compressed file. See the file README.MAKE for instructions on compiling.
Download selected DGGRID binaries.

Credits

DGGRID was entirely written in C++ by Kevin Sahr with the following exceptions:

DGGRID uses a (slightly modified) version of Alan Murta's General Polygon Clipping (GPC) library.
Lian Song wrote the original versions of some of the spherical trigonometry routines and the original implementation of the ISEA projection.
The gnomonic projection code is adapted from Gerald Evanden's PROJ.4 library.
DGGRID uses George Marsaglia's "Mother" psuedo-random number generation function.

The DGGRID specifications were developed by (in alphabetical order): A. Ross Kiester, Tony Olsen, Barbara Rosenbaum, Kevin Sahr, and Denis White.

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