These are not really intended for public consumption.
.googleMapURL(latitude, longitude, position = NULL, zoom = 11,
maptype = c("roadmap", "satellite", "terrain", "hybrid"),
mark = FALSE, radius = 0)vectors of latitude and longitude values
vectors of latitude and longitude values
a data frame containing latitude and longitude positions
zoom level for initial map (1-20)
one of 'roadmap', 'satellite', 'terrain', and 'hybrid'
a logical indicating whether the location should be marked with a pin
a vector of radii of circles centered at position that are displayed on the map
a URL as a string