The rainfall isoline smoothed by the tension spline function algorithm in the process of making rainfall isoline map of Beijing Pinggu District has much better effects.
在绘制北京市平谷地区雨量等值线图过程中，应用张力样条函数算法光滑后的雨量等值线图达到了很好的效果。
Map showing distribution ofM8 earthquake fault at Sanhe-Pinggu in 1679 and locations of drills.
图1 1679年三河-平谷8级地震断层的空间展布和钻孔位置图fig。
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