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| RgoogleMaps-package | Overlays on Google map tiles in R |
| degAxis | axis with degrees |
| GetMap | download a static map from the Google server |
| GetMap.bbox | GetMap bbox |
| GetMap.OSM | Query the Open Street Map server for map tiles instead of Google Maps |
| LatLon2XY | computes the coordinate transformation from lat/lon to map tile coordinates |
| LatLon2XY.centered | computes the centered coordinate transformation from lat/lon to map tile coordinates |
| MapBackground | get static Map from the Google server |
| MaxZoom | computes the maximum zoom level which will contain the given lat/lon range |
| mypolygon | simple wrapper function to plot colored polygons |
| PlotArrowsOnStaticMap | plots arrows or segments on map |
| PlotOnStaticMap | overlays plot on background image of map tile |
| PlotPolysOnStaticMap | plots polygons on map |
| qbbox | computes bounding box |
| ReadMapTile | Read a bitmap image stored in the PNG format |
| RGB2GRAY | translates an RGB image matrix to gray scale |
| TextOnStaticMap | plots text on map |
| Tile2R | simple utility to offset and scale XY coordinates with respect to the center |
| updateusr | Updates the 'usr' coordinates in the current plot. |
| XY2LatLon | computes the centered coordinate transformation from lat/lon to map tile coordinates |