Gr Graphing Application
Gr is a visualization and analysis application for displaying, editing, and printing X-Y data. It can also be used to display or animate vector data, particle paths, or two-dimensional (2D) data fields. Gr is often used with time series data, but it will work with any data that describes Y as a function of X. Gr allows you to zoom in and out and pan within a graph. It also offers several ways to edit or manipulate the data.
Gr was written by John Donovan for use by members of the U.S. Geological Survey (USGS) San Francisco Bay Hydrodynamics Project in Sacramento, California. The program reads several data formats. Gr is written using the Java platform, OpenGL, and JOGL. It runs on several platforms, including Windows.
For a full description of Gr's basic capabilities, complete with screen shots, see the the Gr User Manual.
Examples of some of Gr's more advanced capabilities are shown on the Particle Tracking Model page.
Also see the VPV web page.
Download Gr
You can download the current version of
There are older versions of Gr for SGI IRIX, Sun Solaris (SPARC), and Linux (x86)
Contact the author to obtain the latest version of Gr for platforms other
than Windows.
You can also download the Gr source code.
The design of the Gr application and API were part of a Master's Project and are discussed in the project write up.
Contact Information
If you have questions, suggestions, or bug reports, contact one of the people listed below.
John M. Donovan
jmd@usgs.gov
(916) 278-3120
Peter E. Smith
pesmith@usgs.gov
(916) 278-3125
