A HeatMap chart allows displaying a collection of GPS activities on a map and it is a nice way to visualize GPS data. On-line tools provide this functionality, but I wanted to implement my own, displaying heat maps using data from my own computer, without...| alex-hhh.github.io
I announced my original plot overlay implementation on the Racket Users mailing list and the Racket developers were enthusiastic about these improvements and they suggested that I contribute them to the main plot package. They also suggested a different a...| alex-hhh.github.io