This paper expounds in theory that, we may use the relative stability or their ratio caused by UNVARIABLE as the proportion of the point on datum, which accords with the demands for choice of datum.
本文从理论上阐明用不变量导出的相对稳定度函数或其比值作为点在基准中的份量是符合对基准选择之要求的。
Use to indicate a datum target area, line or point.
用于指示基准目标区域、线条或点。
Ground control point data is the essential datum for geometry processing in the photogrammetry.
地面控制点数据是航天航空图像摄影测量几何处理的必需数据。
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