LonLat2XY               Convert a lon/lat coordinate to a tile
                        coordinate
OSM_scale_lookup        Look up OpenStreetMap scale for a given zoom
                        level.
XY2LonLat               Convert a tile coordinate to a lon/lat
                        coordinate
bb2bbox                 Convert a bb specification to a bbox
                        specification
calc_zoom               Calculate a zoom given a bounding box
crime                   Crime data
geocode                 Geocode
geom_leg                Single line segments with rounded ends
get_cloudmademap        Get a CloudMade map.
get_googlemap           Get a Google Map.
get_map                 Grab a map.
get_navermap            Get a Naver Map
get_openstreetmap       Get an OpenStreetMap
get_stamenmap           Get a Stamen Map
ggimage                 Plot an image using ggplot2
gglocator               Locator for ggplot objects
ggmap                   Plot a ggmap object
ggmap-defunct           Defunct ggmap functions
ggmap_options           ggmap Options
ggmapplot               Don't use this function, use ggmap.
hadley                  Highly unofficial ggplot2 image
inset                   Add ggplot2 insets to a map
inset_raster            Create a (ggplot2) raster layer
legs2route              Convert a leg-structured route to a
                        route-structured route
make_bbox               Compute a bounding box
mapdist                 Compute map distances using Google
print.ggmap             Print a map
qmap                    Quick map plot
qmplot                  Quick map plot
register_google         Register a Google API
revgeocode              Reverse geocode
route                   Grab a route from Google
theme_inset             Make a ggplot2 inset theme.
theme_nothing           Make a blank ggplot2 theme.
trek                    Grab a trek from Google
wind                    Wind data from Hurricane Ike
zips                    Zip code data for the Greater Houston
                        Metropolitan Area from the 2000 census
