Landa igridi ye-UTM ye-1: amashidi e-50,000 avela ezweni lakini

Amashidi ayi-1: 50,000 aziwa kakhulu ekudwebeni imidwebo yamazwe amaningi, ekuqaleni ayakhiwa noDatum NAD27 waseMelika. Kulokhu ngibakhiqize ku-WGS84; Akulungile ukukholelwa ukuthi zingaguqulwa ukuqagela ngokuhambisa i-vector njengoba abanye abantu babejwayele ukwenza ezifundeni ezincane.

Uma ukhumbula, ngaphambi kokuthi ngilayishe amazoni, manje ngilayishe amazoni afanayo kodwa ngegridi yamashidi angu-1:50, ngicacisa ukuthi ibizwa ngokuthi amashidi angu-000:1 ngoba lobu bukhulu obusetshenziswa kwamanye amazwe ukuphrinta. Nokho, igama elifanelekile lalo mdwebo wamabalazwe kungaba amashidi 50,000'1” ngo-30′

Lawa mashidi enziwe ngama-geographic coordinates futhi angu-1'30” ubude ngo-1' latitude, okuwenza abe amasegimenti aqondile akha amakhothamo avala ukusuka enkabazwe lapho esondela esigxotsheni; Lokhu kusho ukuthi ngaphakathi kwendawo akukho ivekhtha eyodwa yalezi ene-engeli yokuthambekela efanayo.

Yingakho la maqabunga kufanele awakhiwe ngezixhumanisi zendawo, ake sibone lesi sibonelo:

Ukusebenzisa Amashadi ekupheleni kwesokudla endaweni 14 elisogwini oluseningizimu ye yaseMexico cishe 26,696 budze ngenkathi ekupheleni efanayo, kodwa i-Atlantic coast izinyathelo 26,171 amamitha, njengoba ukuvala at Ezindaweni eziphakeme.

Esifundweni sami sokugcina bekudingeka ukudala okungenani lezi zindawo ezimbalwa ukuze ngikwazi ukuchaza ukuthi zisebenza kanjani esikalini semephu. Ngakho-ke, kwakumele ngiphendukele kulokho enganginakho ngaleso sikhathi; nokuthi ngendlela ikwenza kahle kakhulu:

Indlela yokudala i-reticle

Ukusebenzisa i-GIS ebonakalayo kwenziwa ngezinyathelo ezimbili kuphela:

I-1 Dala isendlalelo esisha

Ifayela / ukudala / ukudweba

Bese sabela ukuqagela, chofoza kwesokudla "kumdwebo", "ukwabela ukuqagela", bese ukhetha i-UTM, indawo 16, North.

I-2 Yakha imeshi

buka / Graticle

Ngikhetha igridi ye-zone 16, esuka kubude obungama-84 iye ku-90, ngiyishiya inegethivu njengoba isentshonalanga yeGreenwich. Ngokufika ku-latitude, ukusuka enkabazwe futhi njengoba ngingafuni ukuthi ifike esigxotsheni, ngikhetha ukusuka kuziro kuye ku-72. Ngakwesokudla nginikeza ngaso sonke isikhathi uma ngifuna inetha, okuyisilinganiso samaqabunga 1: 50,000, lezi zilinganiso esimweni sami ngu-1 '30” we-longitude kanye no-1' we-latitude: ukubhala 1'30” ngihlukanisa u-1.5 ngo-60 okungaba amadigri angu-0.25 kanye no-1/60 okungaba amadigri angu-0.166667.

Futhi kunginika ithuba lokukhetha uma ngifuna ukubunjwa (amatayela), amaphuzu, awela ... Ngakhetha imigqa

bese ngichofoza inkinobho ethi "dala" futhi "kulungile"

Ukwakha ezinye izingxenye kuyindaba yokushintsha ukuqagela kwabo. Lapho izindawo ze-UTM sezishintshelwe kuGoogle Earth, yile ndlela ezibukeka ngayo (ukufihla indawo 16 okuyiyona ebengiyidalile ekuqaleni).

Lapho ungabona ukuthi:

• IMexico isendaweni engu-11, 12, 13, 14, 15 no-16. Konke kusenyakatho yezwe.
• Guatemala nase-El Salvador ezindaweni ze-15 ne-16
• I-Honduras, iNicaragua neCosta Rica ezindaweni ze-16 ne-17,
• I-Panama ezindaweni ze-17 ne-18
• I-Colombia kulezi zindawo ze-17, i-18 ne-19, enenkinga enayo enyakatho yezwe kanye naseningizimu yezwe,
• I-Peru ku-17, i-18 ne-19,
• I-Bolivia ku-19, i-20 ne-21,
• I-Argentina ku-18, 19, 20 nasezindaweni ze-21,
• I-Chile ezindaweni ze-18 ne-19
• I-Brazil ezindaweni ezingu-18 kuya ku-25 eningizimu yezwe kanye ne-19 kuya ku-22 enyakatho yezwe,
• I-Venezuela e-18, 19, 20 nasezindaweni ze-21
• I-Uruguay ezindaweni ze-21 ne-22,
• I-Paraguay ezindaweni ze-20 ne-21,
• I-Ecuador ezindaweni ze-17 ne-18.

Lokhu kubonisa izindawo ze-UTM ezinegridi efanayo ye-Europa, kusukela e-27 kuya endaweni ye-37; bonke enyakatho hemisphere.

Uma ungenayo i-GIS Manifold, lapha ungalanda ifayela le-kmz, ongayisebenzisa nge-Google Earth:

Landa

Uma unesifiso sokuba nazo zonke izindawo, kusixhumanisi esilandelayo ungathenga ifayela eliqukethe zonke izindawo ze-UTM. Kufaka izindawo:

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