I want to generate heat map from a set of data which is latitude & longitude. I've 20,000+ latitude & longitudes in a text file.
Can any one tell me how to generate heat map?
I'll appreciate if some one can provide me free version of heat map.
Thanks!
There's an open source library called heatmap.js which might work for you. It's HTML5 based so won't work in older browsers though. They also have a GMaps Heatmap Overlay, so it's fairly plug and play.