„out-door” interpretation of satellite images biró, marianna, molnár, zsolt, horváth, ferenc...
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„OUT-DOOR” INTERPRETATION OF SATELLITE IMAGES
Biró, Marianna, Molnár, Zsolt,Horváth, Ferenc and Révész, András
Institute of Ecology and BotanyVácrátót
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Carpathian
Carp
athian
Adriatic
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Peucedanum officinaleAster punctatus
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Forest-steppe woodland
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woodland
meadow + marsh
settlement5 km
1780Flood-plain of the Körös river
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1822
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1860
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1884
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1940
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1950
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1998
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Recent and historical data sources
Present-day field data (surveys)Topographic maps, soil maps etc.Aerial photos, satellite images
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flat steppe landscape
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Hortobágy alkali steppe
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Flood-plain
Primary alkali steppe
1783 Soil map Landsat TM, April
Hortobágy alkali steppe
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Pasture map (1805)
Pitvaros
loess ridge
alkali steppe
marsh
dry
seasonally wet
wet
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Alkali steppe landscape (20 000 hectares)
Cloudy April image with wetlands
Reconstructed wetland network
Borsodi-Mezőség
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„Out-door” interpretation of satellite images
Iteration of field observation and interpretation50-100 times a day for e.g. 20 field days.
1. What is the vegetation of certain areas?2. What is their pattern in the landscape?3. How the surrounding landscape looks like?
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The Hortobágy alkali steppe
Covered with semi-natural vegetation
Grasslands + wetlands + woodlands
Alkali and non-alkali grasslands
Primary and secondary grasslands
Alkali meadows and marshes
Wet meadows and drying-out meadows
Drying-out meadows with Agropyron
Alkali mud with/without Camphorosma
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Hortobágy alkali steppe
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Hortobágy alkali steppe
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Ancient dunes with native trees
Abandoned arable field with non-native trees
Low natural value
High natural value
Kiskunság sand dunes
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Kiskunság meadows
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„Out-door” interpretation of satellite images
Adventages1. Quick iteration2. Locally validated, detailed „legend”3. Always has some historical aspect
Disadventages1. Need of remote sensing experts2. Technology is at home3. Quality of waterproof prints4. Satellites see „chlorofil+water+ soil”, not species/vegetation types