Ngenisa i-OpenStreetMap idatha kwi-QGIS

Isixa semininingwane ekhoyo OpenStreetMap likhulu kakhulu, kwaye nangona lingahambelani ngokupheleleyo, kumaxesha amaninzi lichanekile ngakumbi kunedatha ngokuqhelekileyo eqokelelwe ngamaphepha amaphepha e-1: 50,000.

Ku-QGIS kukukhulu ukulayisha olu luhlu njengemephu yangemvelaphi njengemifanekiso yeGoogle Earth, apho iiplagi zikhona, kodwa le imephu yangemvelaphi kuphela.

Yintoni eyenzekayo ukuba into oyifunayo kukuba ube ne-OpenStreetMap ungqimba njengevolisi?

1 Khuphela kwiziko le-OSM

Ukwenza oku, kufuneka ukhethe indawo apho ulindele ukulanda idatha. Kucacile ukuba iindawo ezinkulu kakhulu, apho kukho ulwazi oluninzi, ubukhulu be database buza kuba buninzi kwaye bube buthathaka. Ukwenza oku, ukhetha:

Vector> OpenStreetMap> Landa

osm qgis

Apha ukhetha umzila apho ifayile ye xml kunye ne extension .osm iya kulandwa. Kunokwenzeka ukubonisa uhla lwe-quadrant ukusuka kumgca okhoyo okanye ngesiboniso samanje sombono. Emva kokuba ukhetho lukhethiwe ukwamukela, inkqubo yokukhuphela iqala kwaye umthamo weedatha okhutshweyo uboniswa.

2 Yakha iDatazi

Emva kokuba ifayela le-XML likhutshiwe, oko kuyimfuneko ukuyiguqula kwisiseko sedatha.

Oku kwenziwa nge: Vector> OpenStreetMap> Ukungenisa i-topology evela kwi-XML ...

osm qgis

Nantsi siyakucelwa ukuba singene kumthombo, ifayile yeDB SpatiaLite yefayile kunye nokuba sifuna ukuba uqhagamshelo lwangaphandle lufakwe ngokukhawuleza.

3. Shayela umgca kwiQGIS

Ukufowunelwa kwedatha njengomgca kufuna:

Umtsalane> OpenStreetMap> I-topology yokuthumela ngaphandle kwi-SpatiaLite ...,

osm qgis

Kufuneka kuboniswe ukuba siza kubiza kuphela amanqaku, imigca okanye iipolgoni. Kwakhona kunye neqhosha lokulayisha kwiziko ledatha ungabhala uluhlu lwezinto ezenza umdla.

Ngenxa yoko, sinokulayisha umgca kumephu wethu, njengoko kuboniswe kumfanekiso olandelayo.

osm qgis

Kakade ke, ekubeni i-OSM yindlela evulelekileyo yomthombo, kuya kuba lixesha elide kwizixhobo zokuthengisa ukwenza lo hlobo lwento.

Shiya impendulo

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