LonLat2XY: Convert a lon/lat coordinate to a tile coordinate

In fresques/ggmap: Spatial Visualization with ggplot2

Description

Convert a lon/lat coordinate to a tile coordinate for a given zoom. Decimal tile coordinates (x, y) are reported.

Usage

LonLat2XY(lon_deg, lat_deg, zoom, xpix = 256, ypix = 256)

Arguments

lon_deg	longitude in degrees
lat_deg	latitude in degrees
zoom	zoom
xpix	width of tile in pixels
ypix	length of tile in pixels

Value

a data frame with columns X, Y, x, y

Author(s)

David Kahle [e-mail], based on function LatLon2XY by Markus Loecher, Sense Networks [e-mail] in package RgoogleMaps

See Also

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

Examples

## Not run: 
gc <- geocode('baylor university')
LonLat2XY(gc$lon, gc$lat, 10)


## End(Not run)

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