Loading ...
Sorry, an error occurred while loading the content.
 

Re: AI-GEOSTATS: sparse data problem

Expand Messages
  • Gali Sirkis
    Thank you Umberto, this definitely sounds as an interesting solution. Can you advise something to read about this method? thanks again, Gali ...
    Message 1 of 2 , Dec 4, 2003
      Thank you Umberto,

      this definitely sounds as an interesting solution. Can
      you advise something to read about this method?

      thanks again,

      Gali

      --- Umberto Fracassi <fracassi@...> wrote:
      > Hi Gali,
      >
      > may you not try with Radial Basis Function
      > (Multiquadric) instead of
      > kriging? It's meant to be an exact interpolator,
      > although sometimes it
      > doesn't fully honor your data. However, it's based
      > on the concept of
      > track data which seems to me to suit the issue you
      > mention. I employ RBF
      > with macroseismic effects of historical earthquakes.
      > Since these data
      > are sparse (and scarce and scattered..!) by
      > definition, this algorithm
      > effectively pursues aligned pattern in the dataset.
      >
      > Hope this may help...
      >
      > Ciao and best regards,
      >
      >
      > Umberto
      >
      > Gali Sirkis wrote:
      >
      > >Dear list members,
      > >
      > >Please advise what to do in following case:
      > > The sparse dataset for kriging inlcudes only few
      > >(5-6) original data points + interpolated external
      > >data, that covering whole study area.
      > >One of the original data points seems completly not
      > to
      > >fit to the main correlation line between original
      > and
      > >external data, however mostly probable is not an
      > >error, but might represent different combination of
      > >data properties.
      > >Is there is any chance to use this outlying point?
      > >Does is sound feasible for you as specialists in
      > >statistical analysis to use the kriging method in
      > this
      > >case?
      > >
      > >Many thanks in advance for your help,
      > >
      > >Gali Sirkis
      > >
      > >__________________________________
      > >
      > >
      > >
      >
      > --
      >
      >
      > Umberto Fracassi
      >
      >
      --------------------------------------------------------
      > Istituto Nazionale di Geofisica e Vulcanologia
      > Via di Vigna Murata, 605
      > 00143 Roma
      > Italy
      > Tel: +39-06-51860557
      > Fax: +39-06-5041181
      > Email: fracassi@...
      > WWW: http://www.ingv.it/paleo/fracassi/
      >
      --------------------------------------------------------
      > *********************
      > "This is what you should do: Love the earth and the
      > sun and the animals, despise riches, give alms to
      > everyone that asks, stand up for the stupid and
      > crazy, devote your income and labor to others, hate
      > tyrants, argue not concerning god, have patience and
      > indulgence toward people, take off your hat to
      > nothing known or unknown, or to anyone or number of
      > people ....reexamine all you have been told at
      > school or church, or in any book, dismiss what
      > insults your soul, and your very flesh shall be a
      > great poem."
      >
      > Walt Whitman
      > *********************
      >
      >
      >
      >
      >
      > --
      > * To post a message to the list, send it to
      > ai-geostats@...
      > * As a general service to the users, please remember
      > to post a summary of any useful responses to your
      > questions.
      > * To unsubscribe, send an email to majordomo@...
      > with no subject and "unsubscribe ai-geostats"
      > followed by "end" on the next line in the message
      > body. DO NOT SEND Subscribe/Unsubscribe requests to
      > the list
      > * Support to the list is provided at
      http://www.ai-geostats.org


      __________________________________
      Do you Yahoo!?
      Free Pop-Up Blocker - Get it now
      http://companion.yahoo.com/

      --
      * To post a message to the list, send it to ai-geostats@...
      * As a general service to the users, please remember to post a summary of any useful responses to your questions.
      * To unsubscribe, send an email to majordomo@... with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list
      * Support to the list is provided at http://www.ai-geostats.org
    Your message has been successfully submitted and would be delivered to recipients shortly.