阐述了用数字化仪进行面积量算的基本原理，并进一步对该量算方法的可靠性及精度进行了评定和分析。

In this paper , the principle of area measurement for all blocks on map is discussed through using digitiser, and then assesses the relinbility and anlysis the precision of this measurement way.

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用英文在表格中填入所缺数字，事实上竞赛。 并算总和。 我不知道necps。

Do the sums in the grids by filling in the missing numbers.

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