Yog tias koj siv peb lub cuab yeej locator los nrhiav daim ntawv qhia chaw ntawm txhua qhov chaw GPS, koj yuav raug nthuav tawm nrog ob tus lej uas yuav zoo li gibberish thaum xub thawj siab ib muag. Kev nkag siab yuav ua li cas nyeem cov GPS kev tswj hwm yog qhov tseem ceeb rau kev siv lawv kom zoo hauv cov tshuab navigation lossis faib rau lwm tus.
Ob Hom Hom
Muaj ob txoj hauv kev uas daim ntawv qhia kev tswj hwm tau sau:
1. Degrees, feeb, thiab Seconds (DMS)
Qhov no yog ib txwm, nautical txoj kev sau ntawv coordinates. Nws zoo li no: 41°24'12.2"N 2°10'26.5"E.
- Thawj qhov thaiv yog Latitude (North/South).
- Qhov thib ob block yog Longitude (East/West).
- Nws nyeem li: 41 Degrees, 24 Minutes, 12.2 Seconds North.
2. Decimal Degrees (DD)
Qhov no yog hom niaj hnub siv los ntawm computers, smartphones, thiab cov cuab yeej zoo li Google Maps. Nws hloov cov feeb thiab vib nas this rau hauv ib tus lej lej. Nws zoo li no: 41.40338, 2.17403.
Hauv Decimal Degrees, tsis muaj "N", "S", "E", lossis "W". Hloov chaw, kev taw qhia yog qhia los ntawm tus lej zoo lossis tsis zoo:
- Latitude: Zoo yog North ntawm kab zauv. Negative yog South.
- Longitude: Zoo yog East ntawm Prime Meridian. Negative yog West.
Vim li cas Decimal Degrees zoo dua
Yog tias koj xav tau luam theej daim duab qhia chaw ntawm ib qho chaw GPS xa mus rau ib tus phooj ywg lossis muab tso rau hauv ib qho app, Decimal Degrees yog qhov zoo tshaj. Lawv tsuas yog ob tus lej sib cais los ntawm tus lej cim. Koj tsis tas yuav mus yos hav zoov tus lej cim (°) ntawm koj cov keyboard lossis txhawj xeeb txog qhov sib txawv ntawm qhov yuam kev tsis meej pem rau GPS software.