Ib daim duab qhia yog qhov teev tseg ntawm thaj chaw uas cov khoom nyob rau ntawm nws tau npaj rau hauv cov cim saum toj kawg nkaus: cov vaj tse, txoj kev, txoj kev, kab, zaub, hydrography, thiab lwm yam hauv av, muab tias lawv tau npuav.
Cov Lus Qhia
Kauj ruam 1
Txiav txim siab qhov nplai ntawm daim duab qhia chaw. Nws ib txwm qhia nyob rau hauv nws cov lus dab neeg - cov ntawv sau nrog daim pheem thib. Nov yog qhov sib haum ntawm chav ntsuas ntawm qhov ntsuas ntawm daim ntawv qhia mus rau qhov kev ncua deb hauv av. Yog li, qhov ntsuas ntawm 1: 5000 txhais tau hais tias 1 cm ntawm daim ntawv qhia yog sib npaug li 5000 cm lossis 50 m hauv av.
Kauj ruam 2
Txhawm rau txiav txim siab qhov nrug ntawm daim pheem thib, koj xav tau cov khoom ntawd, qhov kev ncua deb ntawm qhov koj yuav tau txiav txim, tau plhaw rau ntawm daim pheem thib. Qhov loj dua cov nplai ntawm daim ntawv qhia, uas yog, tus lej me dua rau ib tus hauv cov nplai, qhov ntau cov ntsiab lus hauv daim ntawv qhia muaj. Yog li, yog tias koj xav tau txiav txim siab qhov kev ncua deb ntawm cov tsev hauv lub nroog, tom qab ntawd koj xav tau daim duab qhia chaw teev los ntawm 1: 2000 txog 1: 10000, cov tuam tsev tsis tshwm rau ntawm daim duab qhia chaw ntawm cov nplai me me. Yog tias qhov kev ncua deb ntawm kev txiav txim siab, ces koj xav tau daim duab qhia chaw ntawm nplai ntawm 1: 10000 thiab siab dua.
Kauj ruam 3
Pom cov khoom ntawm daim duab kos, qhov kev ncua deb ntawm qhov koj yuav txiav txim siab. Yog tias lawv tsis tau sau rau hauv daim duab kos, kos lawv tus kheej, suav nrog lawv qhov chaw hauv av. Yog li, yog tias koj paub tias qhov khoom ntawd nyob ze rau ntawm txoj kev tshuam, nrhiav txoj kev sib tshuam hauv daim pheem thib thiab kos nws nrog lub dot. Yog tias ib qho ntawm cov khoom yog lub roob siab tshaj, ces pom nyob rau ntawm daim ntawv qhia chaw siab tshaj nyob hauv thaj chaw uas muaj lub roob no nyob.
Kauj ruam 4
Kos cov kab ncaj nruab nrab ntawm ob lub ntsiab lus thiab ntsuas nws nrog tus pas ntsuas. Hloov cov centimeters ntsuas ntawm daim duab kos mus rau qhov kev ncua deb hauv av raws li cov nplai tau teev tseg hauv daim duab qhia.
