In the process of reserve calculation using volumetric method, to confirm oil-bearing area is in fact to calculate polygon area.

在用容积法计算地质储量的过程中，含油面积的确定实际上是计算多边形的面积。

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Lastly, a new thought of using the connected area fill method to deal with the complex island polygon is also presented in the paper.

本文还提出用连通性区域填充的方法处理各种任意复杂岛的思想。

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And they are often distorted. First, a low passed filter is used to smooth the contour. And a polygon approximating method based on area error is used to approximate the contour.

鉴于这种情况，我们先使用低通滤波对轮廓曲线作光顺处理，随后再采用基于面积误差的多边形逼近法对曲线作逼近处理。

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