中文说明：
根据所给样本数据用三种不同的方法绘制该公路并估计其长度。 分别用线性插值法、最近邻域插值法和三次样条插值法计算公路长度，并用勾股定理估计公路的长度。
English Description：
According to the given sample data, the highway is drawn and its length is estimated by three different methods.
The highway length is calculated by interpolation method, and the highway length is estimated by Pyt
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中文说明：
根据所给样本数据用三种不同的方法绘制该公路并估计其长度。 分别用线性插值法、最近邻域插值法和三次样条插值法计算公路长度，并用勾股定理估计公路的长度。
English Description：
According to the given sample data, the highway is drawn and its length is estimated by three different methods.
linear_16006524.m
nearst_16006524.m
spline_16006524.m