Community Modeling and Analysis System



How do you know if you should use PAVE or VERDI?

VERDI was developed as a replacement for the PAVE program. Because PAVE is no longer in active development and support is limited, VERDI offers the best option as a state-of-the-art visualization program.

Visualize gridded netCDF data with this easy-to-use Java program.

VERDI is a Java program for visualizing meteorology, emissions, and air quality modeling data. With options for overlaying GIS Shapefiles and observational data onto model output, VERDI offers a range of options for viewing atmospheric modeling data. VERDI scripting provides a powerful interface for automating the production of graphics for analyzing your data.



VERDI has been updated to use Java 7.0. It is easy to install and portable across different operating systems.

Now Released on 64-bit Windows 7 in addition to 32-bit and 64-bit Linux, 32-bit Windows 7 and Mac


The VERDI user environment is an intuitive GUI that makes importing datasets, creating formulas, and generating plots easy.

Supported Plot Types

VERDI currently can be used to create 2-d tile plots, vertical cross sections, scatter plots, timeseries line, timeseries bar, contour plots, vector-tile plots, areal interpolation plots, and observation-tile plots

Supported File Format Conventions

CMAQ Input/Output Applications Programming Interface (I/O API) netCDF, WRF netCDF, CAMx (UAM-IV), and ASCII format (for observational data)


VERDI can be driven with a scripting language to allow batch-generation of images.


  • updated world map

History of VERDI

Driven by the air quality modeling community's need for a replacement to PAVE, the U.S. EPA sponsored the development of VERDI. PAVE is a Unix-based software system written in C and Motif. While the EPA is satisfied with the functionality of PAVE and desired to keep those capabilities, they recognize that the PAVE technology is outdated and wanted an updated, more efficient, flexible, and modular visualization software system. Argonne National Laboratory developed VERDI to duplicate the functionality of PAVE in a Java program.

Latest Version: VERDI version 1.6alpha


VERDI Training


Previous Documentation

Online Resources

System Requirements

O/S Windows, Linux, Mac
Memory 1024 Mb RAM
Software All needed VERDI components are contained in the distribution package.