Ubuchwepheshe be-GPS kanye nezinhlelo zayo zokusebenza ku-Jografi
Ubuchwepheshe be-Global Positioning System (GPS) sebuyingxenye ebalulekile yempilo yanamuhla, kusukela ekuzulazuleni kwezimoto kuya ekumepheni kwesifunda. Ku-geography, i-GPS ayiqondwa nje kuphela njengethuluzi lokunquma indawo kodwa futhi njengobuchwepheshe obusekela ukuqoqwa kwedatha yendawo, ukuhlaziywa kwesifunda, kanye nokwenza izinqumo ezisekelwe endaweni. Ngekhono layo lokuhlinzeka ngezixhumanisi ngokushesha nangokunembile, i-GPS yandisa indlela izazi zejografi eziqonda ngayo ubuso boMhlaba kanye nokuguquguquka okwenzeka kuwo. Lesi sihloko sixoxa ngencazelo ye-GPS, izimiso zayo zokusebenza, izinhlobo zayo, kanye nokusetshenziswa kwayo emikhakheni eyahlukene yejografi.
Incazelo kanye nomlando omfushane we-GPS
I-GPS uhlelo lokuzulazula olusekelwe kwisathelayithi olwakhiwe yi-United States ukuze lunikeze ulwazi lwendawo, ijubane, kanye nesikhathi kulo lonke uMhlaba. Intuthuko yaqala ngawo-1970 futhi kamuva yavulwa ukuze isetshenziswe kabanzi ngabantu abavamile ngasekupheleni kwekhulu lama-20. Namuhla, i-GPS ihlanganiswe kumadivayisi ahlukahlukene, kufaka phakathi ama-smartphone, ama-smartwatches, izimoto, ngisho nemishini yokuhlola yobungcweti.
Nakuba igama elithi "GPS" livame ukusetshenziswa kabanzi, kunezinye izinhlelo eziningana zesathelayithi zokuzulazula emhlabeni wonke namuhla, njenge-GLONASS (Russia), iGalileo (European Union), kanye ne-BeiDou (China). Ekusetshenzisweni kwemephu kanye nokwezindawo, amadivayisi amaningi esimanje asebenzisa inhlanganisela yamasathelayithi avela kulezi zinhlelo, okuthiwa i-Global Navigation Satellite System (GNSS). Kodwa-ke, i-GPS isalokhu iyigama elidumile kakhulu lobuchwepheshe bokubeka indawo obusekelwe kusathelayithi.
Indlela i-GPS esebenza ngayo
I-GPS isebenza ngokusebenzisa izimpawu ezivela kumasathelayithi azungeza uMhlaba. Empeleni, isamukeli se-GPS sibala ibanga eliphakathi kwaso namasathelayithi amaningana ngokusekelwe esikhathini sokuhamba kwezimpawu zomsakazo. Ngenxa yokuthi amasathelayithi adlulisa izimpawu eziqukethe ulwazi lwesikhathi nendawo, isamukeli singabala "ibanga elingamanga," noma amabanga abonakalayo. Ngokwamukela izimpawu ezivela kumasathelayithi okungenani amane, isamukeli singanquma izingxenye ezintathu zesikhundla (i-latitude, i-longitude, kanye nokuphakama) futhi silungise amaphutha esikhathi ewashini langaphakathi ledivayisi.
Umqondo oyinhloko osetshenziswayo ukuhlukanisa izindawo ezintathu: ukunquma indawo ngokuhlangana kwezindawo eziningi eziqhelelene nesathelayithi. Uma amasathelayithi ebaningi futhi i-geometry yesathelayithi iba ngcono (eyaziwa ngokuthi i-DOP, i-Dilution of Precision), kulapho ukunemba kokuma okungafinyelelwa khona kuphakeme khona.
Ukunemba kwe-GPS kanye nezici ezithonyayo
Ukunemba kwe-GPS kuyahlukahluka kuye ngekhwalithi yedivayisi kanye nezimo zemvelo. Amadivayisi e-GPS kumaselula ngokuvamile anokunemba kwamamitha ambalwa emoyeni ovulekile. Okwamanje, amadivayisi okuhlola i-geodetic GNSS angafinyelela ukunemba kwamasentimitha, ikakhulukazi uma kusetshenziswa izindlela zokulungisa umehluko.
Ezinye izici ezithinta ukunemba zifaka:
1. Izimo zomkhathi (i-ionosphere kanye ne-troposphere): Izimpawu zesathelayithi zingaba nokulibaziseka, okubangela ukubala ibanga kube kubi kancane.
2. Izindlela Eziningi: Isignali igxuma ezakhiweni, emaweni, noma ebusweni bamanzi, bese imukelwa njengesignali eyengeziwe, ephazamisayo.
3. Izithiyo zomzimba: Uphahla lwehlathi eliminyene, izakhiwo ezinde, noma izigodi ezincane kunganciphisa inani lama-satellite angabanjwa.
4. Ikhwalithi yesamukeli kanye ne-antenna: Amadivayisi ocwaningo lochwepheshe asebenzisa ama-antenna nama-algorithms angcono kunamadivayisi abathengi.
5. I-geometry yesathelayithi (i-DOP): Amasathelayithi ahlelwe eduze kakhulu enza ukuhlangana kokubala indawo kube ngaphansi kokufanele.
Ukuze kuthuthukiswe ukunemba, kusetshenziswa amasu anjenge-Differential GPS (DGPS), i-Real-Time Kinematic (RTK), noma ukulungiswa okusekelwe kunethiwekhi (CORS/Continuously Operating Reference Stations). Lezi zindlela ziqhathanisa amasignali avela kumukeli weselula nomukeli wereferensi onendawo yakhe eyaziwayo kakade.
Indima ye-GPS ku-geography
Kwezendawo, idatha yendawo iyisisekelo esibalulekile. Amamephu, ukuhlaziywa kokusetshenziswa komhlaba, ucwaningo lwezinhlekelele, ngisho nezifundo zokusatshalaliswa kwabantu konke kudinga ulwazi olunembile lwendawo. I-GPS ihlanganisa umhlaba wangempela nezinhlelo zokuxhumanisa, okuvumela ukuthi izenzakalo ezisebusweni boMhlaba ziqoshwe njengedatha yendawo futhi zihlaziywe kabanzi kusetshenziswa i-GIS (Geographic Information Systems).
I-GPS ivame ukuhlanganiswa nokuzwa okukude kanye nobuchwepheshe be-GIS. Nakuba izithombe zesathelayithi zinikeza umbono weso lenyoni wobuso boMhlaba, i-GPS isekela ukuqinisekiswa komhlaba kanye nezixhumanisi ezinembile. Ukuhlanganiswa kwalokhu okuthathu kuphumela enkambisweni yokumapha esheshayo, esobala kakhulu, futhi ephendulayo.
Izinhlelo zokusebenza ze-GPS ekumepheni nasekuhloleni
Ukusetshenziswa kwe-GPS okudumile kakhulu kwejografi ukumaka. Ezinhlolovo zasensimini, i-GPS isetshenziselwa:
– Nquma indawo yamaphoyinti okulawula njengereferensi yemephu.
– Ukudweba imingcele yokuphatha, imingcele yomhlaba, noma izinhlobo ezithile zomhlaba.
- Dala imizila yomfula, umgwaqo noma ugu lolwandle ngendlela ehlelekile.
Kumamephu amakhulu, njengamamephu edolobha anemininingwane noma imingcele yomhlaba, ukusebenzisa i-GNSS ene-RTK kuzuzisa kakhulu ngenxa yokunemba kwayo okuphezulu kanye nokusebenza kahle kwesikhathi. Okwamanje, ekuhlolweni okusheshayo okuphakathi nendawo, i-GPS ephathwayo yanele ukuqoqa amaphuzu abalulekile, njengendawo yezikhungo zomphakathi noma amaphuzu esampula ocwaningo.
I-GPS yocwaningo lwe-geography yemvelo
I-Physical geography ifunda ngezinto zemvelo ezifana ne-geomorphology, i-hydrology, kanye ne-climatology. I-GPS isekela lolu cwaningo ngokusebenzisa:
– Izifundo zokushintsha kogu lolwandle: Ukulinganisa okwenziwa ngezikhathi ezithile kusetshenziswa i-GPS kungabonisa ukuguguleka noma ukunqwabelana.
– Ukuqapha ukudilika komhlaba: Izindawo zokuqapha zingafakwa futhi zihlolwe ukuthi azishintshi ngokuhamba kwesikhathi.
– Ukuhlolwa kwemifula kanye nezindawo zamanzi (i-DAS): I-GPS isiza ekubaleni imigwaqo yemifula, izindawo zokuhlangana zemifula, kanye nezindawo zokubheka ukuphuma kwamanzi kanye nekhwalithi yawo.
– Ukuhlaziywa kwesimo sendawo esincane: Nge-GNSS enembile kakhulu, abacwaningi bangakwazi ukuthola ukuphakama kwamamodeli ezikhukhula noma okuguguleka komhlabathi.
Ezifundweni zezinhlekelele, i-GPS ivame ukusetshenziswa ekuqoqweni kwedatha yasensimini yangemva kwenhlekelele, njengokumaka izindawo ezithintekile, izindawo zababaleki, kanye nokusatshalaliswa kosizo.
I-GPS ku-geography yabantu kanye nokuhlela isifunda
Kwi-geography yabantu, i-GPS idlala indima ekutadisheni ukuhamba, ukusatshalaliswa kwemisebenzi, kanye nokusebenzisana kwendawo. Isibonelo:
– Ukuhlaziywa kokuziphatha kokuhamba: Idatha ye-GPS evela kwabaphenduli noma ezimotweni ingabonisa imizila emikhulu, izikhathi zokuhamba, kanye nezindawo zokuminyana.
– Ukuhlela ezokuthutha: I-GPS isekela ukumepha inethiwekhi yemigwaqo kanye nokuhlolwa kokusebenza kwezokuthutha.
– Ukuhlela indawo: Ukunquma indawo yezikhungo zomphakathi njengezikole, izikhungo zezempilo, kanye nezindawo ezivulekile eziluhlaza kungahlanganiswa nokuhlaziywa kokumbozwa kwezinsizakalo okusekelwe kunethiwekhi.
– Izifundo zasemadolobheni: I-GPS isiza ekubaleni ukusetshenziswa komhlaba kwangempela kanye nemisebenzi yezomnotho engakahleleki evame ukungabhalwa phansi kudatha esemthethweni.
Ngokukhula kwe-big data, idatha yendawo evela kumadivayisi eselula ingahlaziywa iyonke ukuze kuqondwe ukuguquguquka kwedolobha. Kodwa-ke, lokhu kudinga nokuphathwa kwedatha yokuziphatha kanye nokuvikelwa kobumfihlo.
Ukuhlanganiswa kwe-GPS ne-GIS kanye nezinhlelo zokusebenza zedijithali
I-GPS iba usizo nakakhulu uma ihlanganiswe ne-GIS. Uma izixhumanisi seziqoqiwe ensimini, idatha ingangeniswa kusofthiwe ye-GIS ukuze:
– Dala amamephu anezihloko (isibonelo, amamephu okusabalalisa amaphuzu esampula).
- Yenza ukuhlaziywa kwebanga kanye nokufinyeleleka.
– Bala indawo kanye nomngcele we-polygon obangelwa ukwenziwa kwedijithali kwensimu.
- Hlanganisa idatha ye-GPS nezithombe zesathelayithi noma amamephu ayisisekelo.
Namuhla, izinhlelo zokusebenza zemephu ezisekelwe kumaselula zivumela ukuqoqwa kwedatha yasensimini okulula kakhulu. Abahloli bangagcwalisa amafomu, bathathe izithombe ezifakwe i-geotagged, futhi bathumele idatha ngqo kuseva, okwenza inqubo yemephu isheshe futhi ibambisane kakhudlwana.
Izinselele nezinkinga zokuziphatha
Nakuba kuwusizo, ukusetshenziswa kwe-GPS kuletha izinselele. Ezindaweni ezinamahlathi amaningi noma ezindaweni zasemadolobheni eziminyene, isignali ingaba buthakathaka, okuholela emininingwaneni enganembile kangako. Ngaphezu kwalokho, ukuthembela kubuchwepheshe besathelayithi nakho kubeka izingozi uma kwenzeka ukuphazamiseka kwesignali noma imikhawulo yokufinyelela.
Izinkinga zokuziphatha nazo zibalulekile, ikakhulukazi maqondana nokulandelela indawo yomuntu ngamunye. Idatha ye-GPS ingaveza izindlela zokuphila zomuntu, ngakho-ke imithetho ecacile mayelana nemvume, ukungaziwa kwedatha, kanye nokugcinwa okuphephile kuyadingeka. Ocwaningweni lwe-human geography, abacwaningi kumele baqinisekise ukuthi ukuqoqwa kwedatha yendawo akulimazi abaphenduli.
I-Penutup
Ubuchwepheshe be-GPS bushintshe indlela i-geography eqhutshwa ngayo: kusukela ekubukeni ngesandla kanye nokudweba kuya ekuqoqweni kwedatha yendawo enembile engahlaziywa ngekhompyutha. Isebenzisa isimiso sokuhlukaniswa okusekelwe ku-satellite, i-GPS ivumela ukubeka ngokushesha, ukusekela imephu, ukuhlola, ucwaningo lwe-geography olungokoqobo, kanye nokuhlela kwesifunda. Ukuhlanganiswa kwayo ne-GIS kanye nezinhlelo zokusebenza zedijithali kuqinisa indima ye-GPS ekwenzeni izinqumo eziqhutshwa idatha. Ukuqhubekela phambili, izinselele zobuchwepheshe nezokuziphatha zidinga ukuphathwa kahle ukuqinisekisa ukuthi ukusetshenziswa kwe-GPS ku-geography kuhlala kunembile, kuphephile, futhi kuzuzisa umphakathi obanzi.
