Parses various object parameters / columns to KML aesthetics: size of the icons, fill color, labels, altitude, width, …
kml_aes(obj, …)space-time object for plotting
other arguments
Valid aesthetics: colour = "black", fill = "white", shape, whitening, alpha, width = 1, labels, altitude = 0, size, balloon = FALSE. Specific features (target variables and the connected hot-spots) can be emphasized by using two or three graphical parameters for the same variable. See plotKML package homepage / vignette for more examples.