Did you get any other answers to your request? I would like to make a contour plot for temperature isopleths. Cheers Urs -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/unusual-chart-type-tp2502686p7226345.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com.