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.
研究地图中等值线群的快速输入问题，给出了自动跟踪提取等值线群的有效算法。
This paper concentrates on how to track and extract the isogram cluster from the map image so that they can be vectorized and inputted into the spatial database rapidly and automatically.
模拟结果通过在电子地图上绘制出气体浓度等值线的方式，可视化显示出发生泄漏事故后泄漏源周围的气体浓度分布状况及其对周围环境的影响情况。
By showing the concentration contours of leak gas on ane-map, the distribution and the influence of the gas around the leak source can be visualized.
模拟结果通过在电子地图上绘制出气体浓度等值线的方式，可视化显示出发生泄漏事故后泄漏源周围的气体浓度分布状况及其对周围环境的影响情况。
By showing the concentration contours of leak gas on ane-map, the distribution and the influence of the gas around the leak source can be visualized.
应用推荐