Daim duab qhia chaw saum toj saud: Cov cuab yeej rau kev npaj Topographic maps yog cov ntaub ntawv ntxaws ntxaws ntawm thaj av, muab thaj chaw thiab qhov siab rau ob qho tib si ntuj thiab tib neeg tsim. Lawv qhia cov duab ntawm thaj av cov roob, hav, thiab tiajlos ntawm cov kab xim av contour (kab ntawm qhov sib npaug ntawm qhov siab saum hiav txwv).
Pob daim duab qhia chaw qhia tsev?
Topographic maps
Ncej yog shown ua cov ntsiab lus, kab, lossis thaj chaw, nyob ntawm lawv qhov loj thiab qhov twg. Piv txwv li, ib tug neeg lub tsev tej zaum yuav qhia raws li me me dub squares. Rau cov tsev loj dua, cov duab tiag yog mapped.
Lub hom phiaj tseem ceeb ntawm daim duab qhia chaw yog dab tsi?
Thaum twg koj nyob hauv thaj chaw deb lossis thaj chaw tsis paub, daim ntawv qhia saum toj saud thiab kab ke yog qhov yuav tsum tau ua. Daim duab qhia chaw saum toj kawg nkaus yog tsim los ntawm daim duab dav hlau thiab nthuav tawm cov duab ntawm thaj av, suav nrog toj, roob, thiab hav, nrog rau cov pas dej, dej, kwj dej, txoj kev, thiab txoj kev. Contour kab qhia qhov nce hauv av.
daim duab qhia chaw thaj chaw muaj tseeb npaum li cas?
Tig tawm, USGS topo maps siv National Map Accuracy Standards. Qhov no txhais tau hais tias 90 feem pua ntawm cov ntsiab lus kab rov tav kuaj los ntawm pab pawg tshawb fawb yog qhov tseeb hauv 40 ko taw. Cov ntsiab lus ntsug, mus rau hauv ib nrab ntawm kab contour, lossis tsib taw, raws li tus qauv 7.5 feeb, 10-foot contour kab. Yog li, yog.
Daim ntawv qhia hom twg qhia thaj chaw siab thiab qis?
Topographic maps sawv cev rau thaj chaw ntawm thaj chaw, xws li toj thiab hav. Daim duab qhia chaw topographic siv cov kab contour los qhia qhov siab sib txawv ntawm daim ntawv qhia. Ib txoj kab contour yog ib hom isoline; nyob rau hauv cov ntaub ntawv no, ib kab ntawm qhov sib npaug nce.
