Tile2R {RgoogleMaps} | R Documentation |
simple utility to offset and scale XY coordinates with respect to the center
Tile2R(points, center)
points |
XY coordinates returned by e.g. LatLon2XY |
center |
XY coordinates of center returned by e.g. LatLon2XY |
mainly used for shrinking the size of a tile to the minimum size.
X |
X values of proper coordinate system |
Y |
Y values of proper coordinate system |
Markus Loecher, Sense Networks <markus@sensenetworks.com>
latR <- c(34.5,34.9); lonR <- c(-100.3, -100); lat.center <- 34.7; lon.center <- -100.2; zoom = 10; ll <- LatLon2XY(latR[1], lonR[1], zoom);#lower left corner ur <- LatLon2XY(latR[2], lonR[2], zoom );#upper right corner cr <- LatLon2XY(lat.center, lon.center, zoom );#center ll.Rcoords <- Tile2R(ll, cr); ur.Rcoords <- Tile2R(ur, cr);