Convert lon/lat to XYZ or TMS tile coordinates

Implements standard Web Mercator tile maths.

Usage

tile_coords_to_xy(lon, lat, z, scheme = c("xyz", "tms"))

Arguments

lon

Longitude in decimal degrees.

lat

Latitude in decimal degrees.

z

Zoom level (integer).

scheme

Tile scheme, either "xyz" (Google/OSM) or "tms".

Value

Named numeric vector with elements x and y.