The dataset in "tornado_complete.txt" file is free for download on this website: http://www.tornadohistoryproject.com

The data are arranged in the following format with white spaces in between:

TouchdownLong(degree) TouchdownLat(degree) Fraction_of_year(unitless) Fujita_Scale(F)

To run the program, download both the source code as well as "tornado_complete.txt" file to the same directory. Run the program and enters number of pixels you want in both x and y directions for resolution, as well as bandwidth of time.