The comparison of isoline map measured by GPS with that by leveling shows that in entire trend they, except South China block, agree with each other basically.
对基于GPS观测所得的等值线图与基于水准观测所得的等值线图进行了比较，比较结果显示，除了华南块体外，二者在整体趋势上比较一致。
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。
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