Tile2R {RgoogleMaps}R Documentation

simple utility to offset and scale XY coordinates with respect to the center

Description

simple utility to offset and scale XY coordinates with respect to the center

Usage

Tile2R(points, center)

Arguments

points XY coordinates returned by e.g. LatLon2XY
center XY coordinates of center returned by e.g. LatLon2XY

Details

mainly used for shrinking the size of a tile to the minimum size.

Value

X X values of proper coordinate system
Y Y values of proper coordinate system

Author(s)

Markus Loecher, Sense Networks <markus@sensenetworks.com>

Examples

  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);

[Package RgoogleMaps version 1.1.6 Index]