Geostatistik - Variogramme und Kriging · Fortgeschrittene Lineare Geostatistik Nichtlineare...

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Zufallsfelder Variographie Gew¨ ohnliches Kriging Fortgeschrittene Lineare Geostatistik Nichtlineare Geostatistik Geostatistik Variogramme und Kriging Prof. van den Boogaart [email protected] Prof. van den Boogaart Geostatistik

Transcript of Geostatistik - Variogramme und Kriging · Fortgeschrittene Lineare Geostatistik Nichtlineare...

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    GeostatistikVariogramme und Kriging

    Prof. van den Boogaart

    [email protected]

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Gliederung1 Zufallsfelder

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    2 VariographieEmpirisches VariogrammNugget, Sill und RangeVariogrammodelle

    3 Gewöhnliches KrigingKriging AufgabeKriging GleichungssystemKriging VorhersageKriging KarteKriging FehlerKriging GainVorhersageintervallKriging EigenschaftenKreuzvalidation

    4 Fortgeschrittene Lineare GeostatistikAndere Lineare Kriging ArtenGeostatistische SimulationFortgeschrittene VariographieVorgehen bei der linearen Geostatistik

    5 Nichtlineare GeostatistikVectorielles KrigingCompositionales KrigingMutliple Point Statistics (MPS)Stochastische Optimierung

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    Gliederung1 Zufallsfelder

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    2 VariographieEmpirisches VariogrammNugget, Sill und RangeVariogrammodelle

    3 Gewöhnliches KrigingKriging AufgabeKriging GleichungssystemKriging VorhersageKriging KarteKriging FehlerKriging GainVorhersageintervallKriging EigenschaftenKreuzvalidation

    4 Fortgeschrittene Lineare GeostatistikAndere Lineare Kriging ArtenGeostatistische SimulationFortgeschrittene VariographieVorgehen bei der linearen Geostatistik

    5 Nichtlineare GeostatistikVectorielles KrigingCompositionales KrigingMutliple Point Statistics (MPS)Stochastische Optimierung

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    Regionalisierte Variablen

    Z (s) = Messwert an Stelle s

    s ∈ R2, Ort

    Eine regionalisierte Variable(Zufallsfeld) hat überall einenWert.Toblers erstes Gesetz der Geo-graphie: Alles ist abhängig.Nahes ist stärker abhängig.

    −150000 −50000 50000 150000

    −1e

    +05

    0e+

    001e

    +05

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    Geostatistische Daten

    x y Z

    ((xy

    ))x1 y1 z1x2 y2 z2...

    ......

    Messorte:

    si , i = 1, . . . , n

    Beobachtungen / Messwerte

    zi = Z (si )

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    −150000 −50000 50000 150000

    −1e

    +05

    0e+

    001e

    +05

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    h-Scatterplot

    X YZ (s1) Z (s1)Z (s2) Z (s1)

    ......

    Z (s1) Z (s2)...

    ...mit ‖s1 − s2‖ ≈ h = 5000

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    010

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    0

    cor= 0.847013453748368

    xi − xj = 5000Z(xj)

    Z(x

    j)

    Prof. van den Boogaart Geostatistik

  • ZufallsfelderVariographie

    Gewöhnliches KrigingFortgeschrittene Lineare Geostatistik

    Nichtlineare Geostatistik

    Regionalisierte VariablenAbhängigkeitStationarit”atVariogramm

    h-Scatterplot

    X YZ (s1) Z (s1)Z (s2) Z (s1)

    ......

    Z (s1) Z (s2)...

    ...mit ‖s1 − s2‖ ≈ h = 55000Kovarianzfunktion:

    c(s1, s2) = cov(Z (s1),Z (s2))

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