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
)a URL as a string
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