Suppose, I have a spacial layout as shown in image 1. I have data about a particular quantity (e.g. Temperature or footfalls) on given x, y coordinate locations. So, basically I have three columns, 1. x coordinate, 2. y coordinate, 3. Footfall/Temp. count. I want to generate a heat map for temperature pattern analysis and overlap on my layout. Sample result is shown in image [2]
I have tried this thing in R using qplot and mba.surf functions, but I was not able to overlap heat map on layout image. So, I want (preferably R code) to get results as shown in image [2]