| bb2bbox | Convert a bb specification to a bbox specification | 
| calc_zoom | Calculate a zoom given a bounding box | 
| crime | Crime data | 
| distQueryCheck | Check Google Maps Distance Matrix API query limit | 
| file_drawer | Manage the ggmap file drawer. | 
| 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 ggplots. | 
| ggmap | Plot a ggmap object | 
| 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 | 
| LonLat2XY | Convert a lon/lat coordinate to a tile coordinate | 
| make_bbox | Compute a bounding box | 
| mapdist | Compute map distances using Google | 
| mutate_geocode | Geocode a dataset | 
| OSM_scale_lookup | Look up OpenStreetMap scale for a given zoom level. | 
| print.ggmap | Print a map | 
| qmap | Quick map plot | 
| qmplot | Quick map plot | 
| revgeocode | Reverse geocode | 
| route | Grab a route from Google | 
| routeQueryCheck | Check Google Maps Directions API query limit | 
| theme_inset | Make a ggplot2 inset theme. | 
| theme_nothing | Make a blank ggplot2 theme. | 
| wind | Wind data from Hurricane Ike | 
| XY2LonLat | Convert a tile coordinate to a lon/lat coordinate | 
| zips | Zip code data for the Greater Houston Metropolitan Area from... | 
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