get textureCoordinateRectangle() {
    return this._textureCoordinateRectangle;
  }
The texture coordinate range that is covered from the
imagery tile.

This is a <code>CartesianRectangle</code> that contains the
(minU, minV, maxU, maxV) coordinate range.

Clients may not modify the returned instance.

@type {CartesianRectangle}
@readonly