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Vetülettan
Vetületek csoportosítása
• Képfelület jellege szerint: henger-kúp-sík
Vetületek csoportosítása
• Alap- és képfelület helyzete szerint: érintő-metsző
Vetületek csoportosítása
• Képfelület helyzete szerint: normál
Vetületek csoportosítása
• Képfelület helyzete szerint: transzverzális
Vetületek csoportosítása
• Képfelület helyzete szerint: ferde
Vetületek csoportosítása
• Torzulási viszonyok szerint:
• Hossztartó (kitüntetett vonal mentén)!
• Területtartó -> geológiai, gazdasági
• Szögtartó -> topográfiai, geofizikai, navigációs
• Általános torzulású -> gazdasági, tematikus teljes Földre
• Fokhálózat képe szerint:
• Valódi
• Képzetes
Gyakran használt vetületek
Gyakran használt vetületek
Gyakran használt vetületek
Gyakran használt vetületek
Gyakran használt vetületek
Gyakran használt vetületek
Egyéb (néha extrém) példák
Egyéb (néha extrém) példák
Egyéb (néha extrém) példák
Egyéb (néha extrém) példák
Magyarországi topográfiai vetületek
• Történeti vetületek:
• Katonai felmérések vetületei
• Sztereografikus
• Henger rendszerek
• Modern vetületek:
• Katonai: Gauss-Krüger és UTM
• Civil: EOV – Egységes Országos Vetület
Magyarországi topográfiai vetületek
• Gauss-Krüger
Magyarországi topográfiai vetületek
• Gauss-Krüger
Magyarországi topográfiai vetületek
• UTM – Universal Transverse Mercator
Magyarországi topográfiai vetületek
• UTM – Universal Transverse Mercator
Magyarországi topográfiai vetületek
• EOV – Egységes Országos Vetület
• X < 400 000 m < Y
Magyarországi topográfiai vetületek
• EOTR – Egységes Országos Térképrendszer
Magyarországi topográfiai vetületek
• EOTR – Egységes Országos Térképrendszer
Magyarországi topográfiai vetületek
• EOTR – Egységes Országos Térképrendszer
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +proj=somerc +lat_0=47.14439372222222
+lon_0=19.04857177777778 +k_0=0.99993
+x_0=650000 +y_0=200000 +ellps=GRS67
+towgs84=52.17,-71.82,-14.9,0,0,0,0 +units=m
+no_defs
• Inkább bontsuk részekre…
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +proj=somerc
• Alkalmazott vetület típusa
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +lat_0=47.14439372222222
+lon_0=19.04857177777778
• Vetület középpontja ellipszoidi koordinátákkal
megadva
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +k_0=0.99993
• Vetület méretparamétere (érintő vagy redukált)
• +x_0=650000 +y_0=200000
• False easting/false northing értéke
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +ellps=GRS67
• Alkalmazott ellipszoid megadása
• +towgs84=52.17,-71.82,-14.9,0,0,0,0
• Megadott ellipszoid dátumparamétere (MB vagy
BW módszerrel)
Vetületdefiniálás QGIS-ben
• PROJ.4 definíció és társai
• +units=m
• Alkalmazott mértékegység

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Vetülettan előadás Geoinformatika 2. gyakorlat