In this paper, the programming method to deal with the survey office computation of double baseline mapping triangulation chain was given by analyzing the relative mathematical models.

本文通过分析相关的数学模型，提出了双基线图根三角锁内业计算的计算机程序。

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Usually for a precise survey control points are established by triangulation.

通常对于精确的测量，控制点是根据三角网来定位的。

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And that geometrical prediction was confirmed directly by the Sloan survey, using the known distances of 500m light years to the density peak and 13 billion light years to the region where the microwave background originates as reference points to look for geometrical distortion, in the way that a more traditional land survey might use triangulation points.

ECONOMIST: Astronomy