Video: Vim li cas cov phiaj xwm phiaj xwm pom txawv ntawm ib leeg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Peb muaj ntau txawv daim ntawv qhia projections vim txhua muaj txawv qauv ntawm distortion-muaj yog ntau dua ib txoj kev uas yuav flatten ib tug txiv kab ntxwv tev. Ib txhia projections tau txawm khaws tej yam ntxwv ntawm tus Lub ntiaj teb tsis distorting lawv, txawm lawv ua tau 'tsis khaws txhua yam.
Kuj tseem paub yog, vim li cas nws tseem ceeb kom muaj cov phiaj xwm sib txawv?
Nyob ntawm lub hom phiaj ntawm lub daim ntawv qhia , qee qhov distortions tau txais thiab lwm tus tsis yog; yog li ntawd, txawv daim ntawv qhia projections muaj nyob rau hauv thiaj li yuav khaws tau ib co khoom ntawm lub kheej kheej-zoo li lub cev ntawm tus nqi ntawm lwm yam khoom. Txhua qhov txawv daim duab projection distorts nyob rau hauv ib tug txawv txoj kev, los ntawm txhais.
Qhov thib ob, dab tsi yog qhov txawv ntawm daim ntawv qhia kev kwv yees? Cov lus qhia
| Qhov projection | Hom | Cov khoom |
|---|---|---|
| Cassini = Cassini–Soldner | Cylindrical | Equidistant |
| Mercator = Wright | Cylindrical | Conformal |
| Web Mercator | Cylindrical | Kev sib haum xeeb |
| Gauss–Krüger = Gauss conformal = (ellipsoidal) transverse Mercator | Cylindrical | Conformal |
Ib yam li ntawd, peb hom phiaj ntawm daim ntawv qhia yog dab tsi lawv txawv li cas?
Peb ntawm cov no hom phiaj xwm phiaj xwm yog cylindrical, conic, thiab azimuthal.
Vim li cas cov phiaj xwm phiaj xwm ua rau muaj kev cuam tshuam?
Vim tias koj tsis tuaj yeem tso saib 3D qhov chaw zoo kawg nkaus hauv ob qhov ntev, distortions ib txwm tshwm sim. Piv txwv li, map projections distort nrug, kev taw qhia, nplai thiab cheeb tsam. Txhua qhov projection muaj qhov zoo thiab qhov tsis muaj zog. Tag nrho hauv tag nrho, nws yog nyob ntawm tus kws kos duab los txiav txim siab dab tsi qhov projection yog qhov zoo tshaj plaws rau nws lub hom phiaj.
Pom zoo:
Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?
Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua
Dab tsi yog qhov txawv ntawm lub teeb pom kev thiab pom tsis pom?
Tsis muaj qhov sib txawv ntawm lub teeb pom kev thiab pom tsis pom lub teeb xws li xov tooj cua nthwv dej thiab X rays. Lawv yog tag nrho cov electromagnetic tsis txawv nyob rau hauv ib txoj kev xwb: lawv wavelength. Lub teeb ultraviolet, X rays, thiab gamma rays tag nrho muaj luv luv wavelengths tshaj li pom lub teeb
Vim li cas cov xim zoo li txawv hauv cov teeb pom kev sib txawv?
Cov khoom tshwm sim xim txawv vim tias lawv nqus qee cov xim (wavelengths) thiab cuam tshuam los yog xa mus rau lwm yam xim. Piv txwv li, lub tsho liab zoo li liab vim tias cov xim molecules nyob rau hauv cov ntaub tau absorbed lub wavelengths ntawm lub teeb los ntawm lub violet / xiav kawg ntawm lub spectrum
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Hom phiaj phiaj xwm phiaj xwm yog Mercator daim ntawv qhia?
Mercator projection. Mercator projection, hom phiaj xwm phiaj xwm qhia hauv 1569 los ntawm Gerardus Mercator. Nws yog feem ntau piav raws li ib tug cylindrical projection, tab sis nws yuav tsum tau muab los ntawm lej