r - Finding the axis range in ggmap class -


when geocode ggmap: 

library(ggmap)     map_obj <- get_map("anchorage, ak")

how find lat , long ranges has? can str(map_obj) , see $ll.lat, $ll.lon ... how can these? i've tried map_obj$ll.lon

i'm asking question because subset data points visible area of map instead of throwing entire lat , long vectors @ ggmap.

to bounding box data:

attr(map_obj, "bb")

to specific coordinate:

attr(map_obj, "bb")$ll.lat

(and on)


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