getTileCoordCenter(tileCoord) {
    const origin = this.getOrigin(tileCoord[0]);
    const resolution = this.getResolution(tileCoord[0]);
    const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);
    return [
      origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,
      origin[1] - (tileCoord[2] + 0.5) * tileSize[1] * resolution,
    ];
  }
@param {import("../tilecoord.js").TileCoord} tileCoord Tile coordinate.
@return {import("../coordinate.js").Coordinate} Tile center.