@Override
  public void onScaleChanged(float scale, float previous) {
    mScale = scale;
  }
Note that coordinates are generally expressed as lat, lng
while 2D space is generally x, y
these are reversed - latitude is the y-axis of the earth, and longitude is the x-axis

North and south are longitude; east and west are latitude.
tileview/src/main/java/com/moagrius/tileview/plugins/CoordinatePlugin.java