结合生产实践，从影响成图精度的几种因素的估算方法入手，比较分析了全数字化测图仪器同模拟测图仪器之间的精度差别。

According to the main factors which affect the mapping precision, it is shown that difference between the digital photogrammetry mapping and analog photogrammetric plotting is comparatively analysed.

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为了测图的需要，所有由仪器测定的散列高程点，均可列入高程点这一名称。

For mapping purposes all scattered heights fixed by instrument may be grouped under this heading.

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