Dab tsi yog qhov hloov pauv hauv Levelling?
Dab tsi yog qhov hloov pauv hauv Levelling?

Video: Dab tsi yog qhov hloov pauv hauv Levelling?

Video: Dab tsi yog qhov hloov pauv hauv Levelling?
Video: Kev hlub tu hnub koj ntsib nws. 10/9/2017 2024, Kaum ib hlis
Anonim

Hloov Point (TP) Ib qho kev cuam tshuam taw tes nruab nrab ntawm BMs los yog TBMs raws li qhov backsight thiab foresight yog coj. Backsight (BS) Ib tug qws nyeem los ntawm "saib rov qab" ntawm a taw tes paub qhov nce xws li BM lossis TP.

Ib yam li ntawd, nws raug nug, dab tsi yog qhov hloov pauv hauv Levelling?

A Hloov Point (C. P) yog a taw tes uas qhia txog kev hloov ntawm cov qib . Nws yog ib taw tes nyob rau qhov twg fore and back sights are taken. Txhua yam khoom ruaj khov thiab txhais tau zoo xws li ciam teb pob zeb, curbstone, rail, pob zeb, thiab lwm yam, yog siv los ua ib qho hloov point . Ib qho Benchmark kuj yuav raug coj los ua hloov point.

Tsis tas li ntawd, qhov hloov pauv tseem ceeb txhais li cas? A tig point yog lub sijhawm tshwj xeeb, tseem ceeb thaum qee yam pib hloov. Cov keeb kwm yuav hais tias Rosa Parks qhov kev tawm tsam lub npav nto moo yog ib qho tig point hauv Civil Rights Movement. Saib rov qab ntawm cov xwm txheej keeb kwm, nws yooj yim haum rau kos ntau yam cov ntsiab lus tig.

Ua raws li qhov kev pom no, dab tsi yog qhov hloov pauv hauv kev tshawb fawb?

A tig point yog ib qho chaw nres tsheb, ib ntus lossis mus tas li, uas yog siv los ua qhov pivot ntawm cov cuab yeej ua ntu zus. Txij li thaum a tig point yog siv los txuas lub hauv paus kev soj ntsuam , nws qhov siab yuav tsum tau ua kom zoo dua qub (tsawg kawg rau lub sijhawm nws yuav siv sij hawm txav lub ntsuas thiab saib rov qab rau nws).

Lub ntsiab lus tig txhais li cas hauv kev nyeem ntawv?

Nyob rau hauv cov ntaub ntawv, lub tig point lub climax yog qhov point qhov siab tshaj plaws hauv kev piav qhia; nws yog qhov zoo siab tshaj plaws thiab nthuav tawm ib feem ntawm zaj dab neeg. Nws yog ib qho tseem ceeb thiab cov cuab yeej piav qhia tseem ceeb rau cov kws sau ntawv ntawm txhua yam, ob qho tib si tsis tseeb thiab tsis tseeb.

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