Greetings! We'll need some more information to help you out. What's the source/format of your data? Ryan > Mr. May, > > I am trying to plot lightning density > (flashes/km^2) based off a list of lightning data with lat. long included. > Thank you in advance for your response! > Ticket Details =================== Ticket ID: HAZ-525300 Department: Support Python Priority: Low Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.