Txhawm rau txiav txim siab qhov chaw nyob ntawm cov khoom tau qhia rau ntawm daim ntawv qhia, koj yuav tsum paub qhov ntsuas uas tau siv hauv nws kev tso ua ke. Raws li txoj cai, cov nplai tau qhia nyob rau hauv qis sab yog kaum hauv daim duab. Yog tias nws ploj lawm, koj tuaj yeem txiav txim siab ntawm koj tus kheej.
Cov Lus Qhia
Kauj ruam 1
Pom ib lub voos voos nyob rau hauv daim duab qhia los ntsuas qhov ntsuas. Sab ntawm txhua qhov xwm txheej ntawm daim phiaj sib npaug sib npaug zos. Txhawm rau nrhiav tus lej no, nyeem kab lus qhia thaum tawm ntawm kab hauv kab ntawm ntug ntawm daim duab. Piv txwv li, qhov kev ncua deb ntawm ob kab ntawm ib daim phiaj mais kev deb yog conventionally sib npaug rau 1 km.
Kauj ruam 2
Coj ib tus pas ntsuas tsis tu ncua. Ntsuas seb qhov kev ncua deb li cas yog sib npaug rau daim ntaub thaiv. Piv txwv li, nws yog 2 centimeters. Hauv qhov no, txhawm rau txiav txim siab qhov teev, koj yuav tsum piv 2 qhov txiaj ntsig tau. Hauv lwm lo lus: 2 cm = 1 km, 1 cm = 500 m, yog li, qhov ntsuas yog 1: 50,000.
Kauj ruam 3
Saib ntawm daim ntawv qhia npe npe kom paub qhov ntsuas nplai. Lub nomenclature nws tus kheej yog tus lej-sau npe lub npe ntawm daim npav. Txhua kab ntsuas tau muab ib lub ntsiab lus tshwj xeeb. Piv txwv li, yog tias lub npe ntawm daim ntawv qhia muaj M-35, qhov no txhais tau tias qhov teev ntawm daim duab yog 1: 1000000, yog tias M-35-XI, tom qab ntawd 1: 200000, yog M-35-18-A-6- 1, tom qab ntawd 1: 10000.
Kauj ruam 4
Raws li koj tuaj yeem pom, qhov no, koj tuaj yeem txiav txim siab qhov nplai yam tsis muaj kev ntsuas ntxiv. Rub tawm ib daim ntawv ua tiav ntawm cov cim qhia npe lub npe ntawm lub npe ntawm Is Taws Nem. Qhov no yuav ua tau txaus yog tias lub npe ntawm daim ntawv qhia yog muaj.
Kauj ruam 5
Teev rau daim ntawv qhia siv cov paub nrug. Cov qauv no yog raws li nram no. Qee daim duab qhia qhia kev thauj mus los ntev rau ntawm txoj kev loj. Txhawm rau paub cov nplai, koj yuav tsum ntsuas qhov kev ncua deb ntawm cov ncej nrog tus pas ntsuas, tom qab ntawd piv nrog tus nqi tau thiab hloov mus rau cov ntsuas.
Kauj Ruam 6
Koj tuaj yeem tuaj yeem paub txog cov nplai ntawm daim ntawv qhia los ntawm cov xeeb ceem tshwj xeeb. Piv txwv li, ntawm tag nrho cov duab ntawm lub teev ntawm 1: 200000 muaj qhov tsim ntawm qhov kev ncua deb ntawm kev sib hais haum. Raws li hauv rooj plaub dhau los, ntsuas qhov kev nrug no nrog tus pas ntsuas, thiab tom qab ntawd piv tus nqi qhia thiab tus nqi tau.
