LatLon2XY {RgoogleMaps} | R Documentation |
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. Thanks to Neil Young (see http://groups.google.com/group/Google-Maps-API/browse_thread/thread/d2103ac29e95696f?hl=en) for providing the formulae used.
LatLon2XY(lat, lon, zoom)
lat |
vector of latitude values |
lon |
vector of longitude values |
zoom |
integer zoom level for Google Maps |
A list with values
Tile |
integer numbers specifying the tile |
Coords |
pixel coordinate within the Tile |
Markus Loecher, Sense Networks <markus@sensenetworks.com>
LatLon2XY(38.45, -122.375, 11)