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Reply [to “Comment on ‘Stochastic interpolation of rainfall data from rain gages and radar using cokriging: 1, Design of experiments,” and “2, Results,’ by Dong‐Jun Seo et al.”]
Author(s) -
Seo DongJun,
Krajewski Witold F.,
AzimiZonooz Ali,
Bowles David S.
Publication year - 1992
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/92wr00009
Subject(s) - citation , interpolation (computer graphics) , radar , library science , computer science , artificial intelligence , telecommunications , motion (physics)
The papers by Seo et aI. [1990a, b] are an interesting application of cokriging and the authors are to be commended for that application. However, one of the important obligations of authors and of referees is to discern the extent to which the results are new and to ensure that relevant literature is cited. Unfortunately, these papers failed significantly in acknowledging prior work. Specifically, the development of cokriging, including universal and disjunctive cokriging, is presented as new work whereas it had already been in print for some time before this paper. In particular, see Myers [1982, 1983, 1984, 1985, 1988a, b, c, 1989], Cart et aI. [1985, 1987], and Cart and Myers [I984, 1985]. Not one of these papers is cited. Mathematical Geology is one of the principal journals publishing geostatistical papers, yet there is only one citation to a paper in Mathematical Geology (and that one is unrelated to cokriging), there are no citations to papers in the proceedings from the second international conference on geostatistics (Lake Tahoe, 1983) or the third conference (Avignon 1988). These are significant publications for geostatistics; both authors and reviewers should be aware of them. More specifically, the complete development of the general form of the cokriging estimator including the case of universal cokriging was already given by Myers [1982]. Various additional details were given in other papers listed above. The general case of disjunctive cokriging was given by Myers [1988c]. The authors have only given much more limited results; in particular, they have only considered the case of the estimation of one variable. However, the equations for this special case are not really different (or simpler) from the general case, and an emphasis on the one-variable case obscures important aspects of the development, specifically, the appropriate positive definiteness conditions for