問答題

【計(jì)算題】4點(diǎn)的絕對(duì)標(biāo)高為60.50m。后視A點(diǎn)的讀數(shù)是1.72m,前視B點(diǎn)的讀數(shù)是2.45m。B點(diǎn)的絕對(duì)標(biāo)高是多少?

答案: ①B點(diǎn)對(duì)A點(diǎn)的高差hab=1.72-2.45=-0.73m
②B點(diǎn)的絕對(duì)標(biāo)高HB=HA+hab=60.50+(...
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