Record Display for the EPA National Library Catalog


Main Title Efficiency of Kriging Estimation for Square, Triangular, and Hexagonal Grids.
Author Yfantis, E. A. ; Flatman, G. T. ; Behar, J. V. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV. ;Nevada Univ., Las Vegas.
Year Published 1987
Report Number EPA/600/J-87/154;
Stock Number PB88-153853
Additional Subjects Sampling theory ; Variance(Statistics) ; Estimating ; Efficiency ; Reprints ; Kriging
Library Call Number Additional Info Location Last
NTIS  PB88-153853 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 26p
Although several researchers have pointed out some advantages and disadvantages of various soil sampling designs in the presence of spatial autocorrelation, a more detailed study is presented herein which examines the geometrical relationship of three sampling designs, namely the square, the equilateral triangle, and the regular hexagon. Both advantages and disadvantages exist in the use of these designs with respect to estimation of the semivariogram and their effect on the mean square error or variance of error. This research could be used to design optimal sampling strategies; it is based on the theory of regionalized variables, in which the intrinsic hypothesis is satisfied. Among alternative designs, an equilateral triangle design gives the most reliable estimate of the semivariogram. This study computes and compares the maximum mean square error for each of these designs.