无疑，你们熟悉地理上的等值线地图，它示出等高线。
No doubt you are familiar with geographical contour maps, which show lines of constant altitude.
由于每一种地图要素唯一关联着一个第二特征值，因而地图要素可以表示为第二特征值的泛等值线或泛等值面。
Because every map element solely correlates a second characteristic value, the map element can be expressed as a generalized isoline or isoplane of second characteristic value.
将NCAR和SURFER两种绘图软件相结合，成功地实现了在特定区域内离散点资料的等值线分析和地图叠加。
We combined NCAR software with SURFER software, and successfully analyzed the contour of discrete point data and realized map superposition in special region.
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