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JQVMap.prototype.resize = function () {
  var curBaseScale = this.baseScale;
  if (this.width / this.height > this.defaultWidth / this.defaultHeight) {
    this.baseScale = this.height / this.defaultHeight;
    this.baseTransX = Math.abs(this.width - this.defaultWidth * this.baseScale) / (2 * this.baseScale);
  } else {
    this.baseScale = this.width / this.defaultWidth;
    this.baseTransY = Math.abs(this.height - this.defaultHeight * this.baseScale) / (2 * this.baseScale);
  }
  this.scale *= this.baseScale / curBaseScale;
  this.transX *= this.baseScale / curBaseScale;
  this.transY *= this.baseScale / curBaseScale;
};