Ib lub sij hawm contour yog qhov ntsug nrug lossis qhov sib txawv ntawm qhov siab ntawm kab contour Index contours yog cov kab bold lossis thicker kab uas tshwm sim ntawm txhua qhov thib tsib contour kab. Yog tias tus lej cuam tshuam nrog cov kab contour tshwj xeeb tau nce, qhov siab ntawm qhov av kuj nce ntxiv.
Dab tsi yog qhov contour ntu ntawm daim duab qhia?
Ib tug neeg contour kab ntawm daim ntawv qhia topographical yog ib ncua sij hawm ntawm qhov siab sib nrug hu ua contour interval. Feem ntau contour ntu yog 5, 10, 20, 40, 80, lossis 100 ko taw. Qhov tseeb contour ncua sij hawm ntawm daim duab qhia chaw nyob ntawm qhov topography tau sawv cev nrog rau qhov ntsuas ntawm daim ntawv qhia.
Yuav ua li cas contour intervals muaj?
Muaj 3 hom kab contour koj yuav pom ntawm daim duab qhia: nruab nrab, ntsuas, thiab ntxiv
- Index kab yog cov kab tuab tshaj plaws thiab feem ntau yog sau nrog tus lej ntawm ib qho ntawm kab. …
- Cov kab nruab nrab yog cov thinner, ntau dua, kab nruab nrab ntawm cov kab ntsuas.
Puas yog contour interval 50 ft?
Thaum nyeem cov kab contour, koj tuaj yeem pom tau yooj yim pom cov duab peb sab ntawm ob sab. Qhov chaw nruab nrab ntawm cov kab contour yog hu ua contour interval thiab sawv cev rau qhov tshwj xeeb (set) nrug. Yog hais tias lub sij hawm contour yog 50 feet, qhov chaw ntsug ntawm ob kab contour yog 50 ko taw
5 Txoj Cai ntawm kab contour yog dab tsi?
Txoj Cai 1 - txhua qhov taw qhia ntawm kab contour muaj tib qhov siab. Txoj Cai 2 - cov kab contour cais nce toj ntawm nqes hav. Txoj Cai 3 - cov kab contour tsis txhob kov lossis hla ib leeg tshwj tsis yog ntawm pob tsuas. Txoj Cai 4 – txhua 5th contour kab yog xim tsaus dua.
