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variance estimation (gstat, geoR, automap)
4 messages · Pilar Tugores Ferra, Paul Hiemstra, Virgilio Gomez Rubio
Hi Pilar, I think this list appropriate :). What would be a good idea is to get a book that describes kriging, some standard books are: Chil?s, J. & Delfiner, P. Geostatistics: Modeling Spatial Uncertainty John Wiley & Sons, New York, 1999 Christensen, R. Plane Answers to Complex Questions: The Theory of Linear Models Springer, New York, 1996 Journel, A. & Huijbregts, C. Mining Geostatistics Academic Press., 1978 A more practical book would be the Applied Spatial Data Analysis in R, see http://www.asdar-book.org/ for more info. On the web you could look at: http://www.kriging.com/, Owned by Isobel Clark http://spatial-analyst.net/wiki/index.php?title=Main_Page, not sure if there is something here on the theory of kriging. For a description of kriging (quite mathematical) you can also look at a paper I wrote, you can download it from http://intamap.geo.uu.nl/~paul/Publications.html, it is the first one titled Read-time automatic...etc This is all I could think of :). cheers, Paul Pilar Tugores Ferra schreef:
Dear all, I'm trying to estimate the variance of a global abundance estimation computed by kriging interpolation and I am stuck. One can easily retrieve the variance at each prediction location (either using the package gstat, geoR or automap) using expressions similar to:
kriging_object$krige.var
or >kriging_object$var1.var but, in fact, I have no idea how these variance values are computed. Could anybody tell me how is it computed or suggest some reference material? Could this question be inappropriate for this list in which case I would also apprieciate if someone could tell me where to ask it. Cheers, Pilar M? Pilar Tugores Ferr? PhD Student Instituto Espa?ol de Oceanograf?a Centro Oceanogr?fico de Baleares Muelle de Poniente s/n 07015 Palma de Mallorca Baleares, Espa?a Telf.: (34) 971 401561 La informaci?n contenida en este e-mail y sus ficheros adjuntos es totalmente confidencial y no deber?a ser usado si no fuera usted alguno de los destinatarios. Si ha recibido este e-mail por error, por favor avise al remitente y b?rrelo de su buz?n o de cualquier otro medio de almacenamiento. This email is confidential and should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage mechanism. [[alternative HTML version deleted]] ------------------------------------------------------------------------
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Drs. Paul Hiemstra Department of Physical Geography Faculty of Geosciences University of Utrecht Heidelberglaan 2 P.O. Box 80.115 3508 TC Utrecht Phone: +3130 274 3113 Mon-Tue Phone: +3130 253 5773 Wed-Fri http://intamap.geo.uu.nl/~paul
Hi, In addition to the list provided by Paul, I would like to add Geostatistics for Environmental Scientists, 2nd Edition Richard Webster, Margaret A. Oliver I have used it in courses for agricultural and environmental engineers and it worked well. I think that the balance between mathematical complexity and applications is quite good. Best, Virgilio El mar, 24-02-2009 a las 23:03 +0100, Paul Hiemstra escribi?:
Hi Pilar, I think this list appropriate :). What would be a good idea is to get a book that describes kriging, some standard books are: Chil?s, J. & Delfiner, P. Geostatistics: Modeling Spatial Uncertainty John Wiley & Sons, New York, 1999 Christensen, R. Plane Answers to Complex Questions: The Theory of Linear Models Springer, New York, 1996 Journel, A. & Huijbregts, C. Mining Geostatistics Academic Press., 1978 A more practical book would be the Applied Spatial Data Analysis in R, see http://www.asdar-book.org/ for more info. On the web you could look at: http://www.kriging.com/, Owned by Isobel Clark http://spatial-analyst.net/wiki/index.php?title=Main_Page, not sure if there is something here on the theory of kriging. For a description of kriging (quite mathematical) you can also look at a paper I wrote, you can download it from http://intamap.geo.uu.nl/~paul/Publications.html, it is the first one titled Read-time automatic...etc This is all I could think of :). cheers, Paul Pilar Tugores Ferra schreef:
Dear all, I'm trying to estimate the variance of a global abundance estimation computed by kriging interpolation and I am stuck. One can easily retrieve the variance at each prediction location (either using the package gstat, geoR or automap) using expressions similar to:
kriging_object$krige.var
or >kriging_object$var1.var but, in fact, I have no idea how these variance values are computed. Could anybody tell me how is it computed or suggest some reference material? Could this question be inappropriate for this list in which case I would also apprieciate if someone could tell me where to ask it. Cheers, Pilar M? Pilar Tugores Ferr? PhD Student Instituto Espa?ol de Oceanograf?a Centro Oceanogr?fico de Baleares Muelle de Poniente s/n 07015 Palma de Mallorca Baleares, Espa?a Telf.: (34) 971 401561 La informaci?n contenida en este e-mail y sus ficheros adjuntos es totalmente confidencial y no deber?a ser usado si no fuera usted alguno de los destinatarios. Si ha recibido este e-mail por error, por favor avise al remitente y b?rrelo de su buz?n o de cualquier otro medio de almacenamiento. This email is confidential and should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage mechanism. [[alternative HTML version deleted]] ------------------------------------------------------------------------
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Thanks you all! I'll have a look and see if I can have access to the reference material you provided me! Cheers M? Pilar Tugores Ferr? PhD Student Instituto Espa?ol de Oceanograf?a Centro Oceanogr?fico de Baleares Muelle de Poniente s/n 07015 Palma de Mallorca Baleares, Espa?a Telf.: (34) 971 401561 -----Mensaje original----- De: Virgilio Gomez Rubio [mailto:Virgilio.Gomez at uclm.es] Enviado el: 25 February 2009 09:44 Para: Paul Hiemstra CC: Pilar Tugores Ferra; r-sig-geo at stat.math.ethz.ch Asunto: Re: [R-sig-Geo] variance estimation (gstat, geoR, automap) Hi, In addition to the list provided by Paul, I would like to add Geostatistics for Environmental Scientists, 2nd Edition Richard Webster, Margaret A. Oliver I have used it in courses for agricultural and environmental engineers and it worked well. I think that the balance between mathematical complexity and applications is quite good. Best, Virgilio El mar, 24-02-2009 a las 23:03 +0100, Paul Hiemstra escribi?:
Hi Pilar, I think this list appropriate :). What would be a good idea is to get a book that describes kriging, some standard books are: Chil?s, J. & Delfiner, P. Geostatistics: Modeling Spatial Uncertainty John Wiley & Sons, New York, 1999 Christensen, R. Plane Answers to Complex Questions: The Theory of Linear Models Springer, New York, 1996 Journel, A. & Huijbregts, C. Mining Geostatistics Academic Press., 1978 A more practical book would be the Applied Spatial Data Analysis in R, see http://www.asdar-book.org/ for more info. On the web you could look at: http://www.kriging.com/, Owned by Isobel Clark http://spatial-analyst.net/wiki/index.php?title=Main_Page, not sure if there is something here on the theory of kriging. For a description of kriging (quite mathematical) you can also look at a paper I wrote, you can download it from http://intamap.geo.uu.nl/~paul/Publications.html, it is the first one titled Read-time automatic...etc This is all I could think of :). cheers, Paul Pilar Tugores Ferra schreef:
Dear all, I'm trying to estimate the variance of a global abundance estimation computed by kriging interpolation and I am stuck. One can easily retrieve the variance at each prediction location (either using the package gstat, geoR or automap) using expressions similar to:
kriging_object$krige.var
or >kriging_object$var1.var but, in fact, I have no idea how these variance values are computed. Could anybody tell me how is it computed or suggest some reference material? Could this question be inappropriate for this list in which case I would also apprieciate if someone could tell me where to ask it. Cheers, Pilar M? Pilar Tugores Ferr? PhD Student Instituto Espa?ol de Oceanograf?a Centro Oceanogr?fico de Baleares Muelle de Poniente s/n 07015 Palma de Mallorca Baleares, Espa?a Telf.: (34) 971 401561 La informaci?n contenida en este e-mail y sus ficheros adjuntos es totalmente confidencial y no deber?a ser usado si no fuera usted alguno de los destinatarios. Si ha recibido este e-mail por error, por favor avise al remitente y b?rrelo de su buz?n o de cualquier otro medio de almacenamiento. This email is confidential and should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage mechanism. [[alternative HTML version deleted]] ------------------------------------------------------------------------
_______________________________________________ R-sig-Geo mailing list R-sig-Geo at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
La informaci?n contenida en este e-mail y sus ficheros adjuntos es totalmente confidencial y no deber?a ser usado si no fuera usted alguno de los destinatarios. Si ha recibido este e-mail por error, por favor avise al remitente y b?rrelo de su buz?n o de cualquier otro medio de almacenamiento. This email is confidential and should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage mechanism.