Tags:
create new tag
, view all tags
Title: Mapping Precipitation in Switzerland with Ordinary and Indicator Kriging

Date: 1 May 1998

Authors: Peter M. Atkinson , Chris D. Lloyd

Link: Atkinson.pdf

Abstract:

This paper uses the geostatistical methods of ordinary kriging (OK) and indicator kriging (IK) to address the problem of estimating values of precipitation at locations from which measurements have not been taken. Several problems or issues were raised including: (i) lognormality of the data, (ii) non-stationarity of the data and (iii) anisotropy of the spatial continuity. Given that the aim of SIC'97 was to compare a variety of different approaches to estimation. IK (informed using directional indicator variogram models) was selected because it is a means to account for lognormality and it was a method that was unlikely to be used widely within the competition. Accuracy of estimates made using IK were compared with OK estimates. It was observed that the OK algorithm, as implemented here, provided more accurate estimates than IK. This was considered to be due, at least in part, to the method used for tail extrapolation and also the small number of data used in estimation (100 data locations). OK was recommended over IK in this instance as OK provided more accurate estimates and was also more easy to implement.

REFERENCE:

Journal of Geographic Information and Decision Analysis, Vol. 2., No. 2, pp. 65-76, 1998.

KEYWORDS: indicator kriging, ordinary kriging, precipitation.

-- TWikiAdminUser - 2010-06-16

Topic attachments
I Attachment Action Size Date Who Comment
PDFpdf Atkinson.pdf manage 326.7 K 2010-07-24 - 21:38 TWikiAdminUser  
Edit | Attach | Print version | History: r4 < r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r3 - 2010-07-24 - 21:39:18 - TWikiAdminUser
 
  • Jump: 
  • Search: 
This site is powered by the TWiki collaboration platformCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback