Method unproject

src/lib/geo/transform.js:88–93

(point, worldSize)

  }

  unproject(point, worldSize) {
    return new LatLng(
      this.yLat(point.y, worldSize),
      this.xLng(point.x, worldSize)
    );
  }

  get x() {
    return this.lngX(this.center.lng);