W; end % The gif image was creating with the command % convert -antialias -loop 10000 -delay 20 -compress LZW Movie_frame10* Heat_eqn.gif % get a function
[[:Image:Urban heat island profile.gif|this]], retraced in SVG. Original images source is [http://www.crh.noaa.gov/images/lsx/recent_event/urban.gif this image]