R plot filled.contour() output in ggpplot2

Question

I want to plot this figure created with filled.contour(), but in ggplot2, how do I do this?

I want to use ggplot2 because the graphing conventions are easier. The r

Answer 1

I took the example from the ggplot2 website.

 # Generate data
 library(reshape2) # for melt
 volcano3d <- melt(volcano)
 names(volcano3d) <- c("x", "y", "z")

 # Basic plot
 v <- ggplot(volcano3d, aes(x, y, z = z)) +  
     stat_contour(geom="polygon", aes(fill=..level..))

Where x and y are your Long and Lat and z is d13C