LatLon2XY

The function LatLon2XY(lat,lon,zoom) computes the coordinate transformation from lat/lon to map tile coordinates given a zoom level.It returns the tile coordinates as well as the pixel coordinates within the Tile itself.

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.

Markus Loecher

RgoogleMaps

Overlays on Static Maps

LatLon2XY function

<dl> <dt>lat</dt>
<dd>latitude values to transform</dd> <dt>lon</dt>
<dd>longitude values to transform</dd> <dt>zoom</dt>
<dd>zoom level.lat,lon,zoom</dd></dl>

Arguments

Author

The function LatLon2XY(lat,lon,zoom) computes the coordinate transformation from lat/lon to map tile coordinates given a zoom level.

It returns the tile coordinates as well as the pixel coordinates within the Tile itself.

computes the coordinate transformation from lat/lon to map tile coordinates — LatLon2XY

<dl>



 <dt>lat</dt>
<dd>latitude values to transform</dd>



 <dt>lon</dt>
<dd>longitude values to transform</dd>



 <dt>zoom</dt>
<dd>zoom level.lat,lon,zoom</dd>



</dl>

LatLon2XY: computes the coordinate transformation from lat/lon to map tile coordinates

Description

Usage

Value

Arguments

Author

Examples