XY2LonLat: Convert a tile coordinate to a lon/lat coordinate

In fresques/ggmap: Spatial Visualization with ggplot2

Description

Convert a tile coordinate to a lon/lat coordinate for a given zoom. Decimal tile coordinates are accepted.

Usage

XY2LonLat(X, Y, zoom, x = 0, y = 0, xpix = 255, ypix = 255)

Arguments

X	horizontal map-tile coordinate (0 is map-left)
Y	vertical map-tile coordinate (0 is map-top)
zoom	zoom
x	within tile x (0 is tile-left)
y	within tile y (0 it tile-top)
xpix	width of tile in pixels
ypix	length of tile in pixels

Value

a data frame with columns lon and lat (in degrees)

Author(s)

David Kahle [e-mail], based on function XY2LatLon by Markus Loecher, Sense Networks [e-mail] in package RgoogleMaps

See Also

http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames

Examples

## Not run: 
XY2LonLat(480, 845, zoom = 11)
XY2LonLat(0, 0, zoom = 1)
XY2LonLat(0, 0, 255, 255, zoom = 1)
XY2LonLat(0, 0, 255, 255, zoom = 1)


## End(Not run)

fresques/ggmap documentation built on May 28, 2019, 8:40 p.m.