constructor(x, y, level, textureCoordinateRectangle, imagery) {
    this._x = x;
    this._y = y;
    this._level = level;
    this._textureCoordinateRectangle = textureCoordinateRectangle;
    this._imagery = imagery;
  }
Creates a new instance.

@param {number} x x-coordinate of the imagery tile
@param {number} y y-coordinate of the imagery tile
@param {number} level level of the imagery tile
@param {CartesianRectangle} textureCoordinateRectangle The texture coordinate
rectangle from the imagery tile that is covered
@param {Imagery} imagery The imagery