... 等深线 fathom curve 等深线 fathom lines 回声测深仪 fathometer ...
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fathom lines of chart 海图等深线
In order to get the more accuracy benthos terrain, not only the discrete electronic chart data but also the fathom lines etc data are considered.
海底地形不但考虑了离散点电子海图数据，而且也将某些特征数据考虑在内，从而生成相对精度较高的海底地形。
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