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RgoogleMaps (version 1.0)

Overlays on Google map tiles in R

Description

This package serves two purposes: (i) Provide a comfortable R interface to query the Google server for static maps, and (ii) Use the map as a background image to overlay plots within R. This requires proper coordinate scaling.

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Version

Install

install.packages('RgoogleMaps')

Monthly Downloads

4,471

Version

1.0

License

GPL

Maintainer

Markus Loecher

Last Published

May 7th, 2009

Functions in RgoogleMaps (1.0)

mypolygon

simple wrapper function to plot colored polygons

RGB2GRAY

translates an RGB image matrix to gray scale

MapBackground

get static Map from the Google server

GetMap

download a static map from the Google server

updateusr

Updates the 'usr' coordinates in the current plot.

GetMap.bbox

download a static map from the Google server

qbbox

computes bounding box

Tile2R

simple utility to offset and scale XY coordinates with respect to the center

LatLon2XY

computes the coordinate transformation from lat/lon to map tile coordinates

PlotOnStaticMap

overlays plot on background image of map tile

LatLon2XY.centered

computes the centered coordinate transformation from lat/lon to map tile coordinates

MaxZoom

computes the maximum zoom level which will contain the given lat/lon range

PlotPolysOnStaticMap

plots polygons on map

RgoogleMaps-package

Utilities to enable overlays on Google Maps