Txawm hais tias qhov ntsuas kab sib npaug sib npaug ntawm txhua qhov kev taw qhia ib puag ncig, yog li khaws cov kaum sab xis thiab cov duab ntawm cov khoom me me, Mercator qhov projection cuam tshuam qhov loj ntawm cov khoom raws li lub latitude nce los ntawm kab zauv mus rau cov ncej, qhov twg qhov ntsuas ua tsis kawg.
qhov kev tsis sib haum xeeb tshaj plaws pom nyob rau ntawm Mercator daim ntawv qhia nyob qhov twg?
Mercator maps distort tus duab thiab txheeb ze loj ntawm continents, tshwj xeeb ze ntawm tus ncej. Qhov no yog vim li cas Greenland zoo li qhov loj me rau tag nrho South America ntawm Mercator maps, thaum qhov tseeb South America yog ntau tshaj yim npaug loj dua Greenland.
qhov kev hloov pauv loj tshaj plaws nyob rau hauv daim ntawv qhia kev kwv yees nyob qhov twg?
Daim duab qhia no siv tib qhov chaw raws li Daim Ntawv Qhia Ntiaj Teb dhau los, tab sis nws yog ntau dua ntawm daim ntawv qhia Conic Projection. Distortions yog qhov loj tshaj rau sab qaum teb thiab sab qab teb - deb ntawm Standard Parallel. Tab sis, vim hais tias Standard Parallel khiav sab hnub tuaj-sab hnub poob, kev cuam tshuam tsawg heev los ntawm nruab nrab ntawm daim ntawv qhia.
Daim duab qhia chaw twg muaj kev cuam tshuam?
Ntawm qhov tod tes, ib hom kev kwv yees uas tsis cuam tshuam cheeb tsam yog lub Cylindrical Equal Area. Daim ntawv ceeb toom ntawm no yuav ua li cas Greenland zoo li qhov loj me me piv rau South America. Cov phiaj xwm uas khaws cia thaj chaw yog hu ua qhov sib npaug lossis thaj tsam sib npaug.
Dab tsi yog plaub qhov kev hloov pauv muaj nyob hauv Robinson qhov project?
Muaj plaub hom kev tsis sib haum xeeb uas yog los ntawm daim ntawv qhia kev kwv yees: nrug, kev taw qhia, duab thiab cheeb tsam.
