GEOPACK is a user-friendly geostatistical software system. It consists of a package of programs for conducting analyses of the spatial variability of one or more random functions. GEOPACK includes several statistical analysis options. Basic statistics which can be calculated include the mean, median, variance, standard deviation, skew, kurtosis, maximum value, and minimum value. Programs are also included for linear regression, polynomial regression, and the Kolomogorov-Smirov test for distribution, and for calculating various percentiles of a selected data set. Variogram programs allow determination of a sample semi-variogram, the cross-semi-variogram, or a semi-variogram for combined random functions for a two-dimensional spatially-dependent random function. GEOPACK also can calculate ordinary kriging and co-kriging estimators in two dimensions and their associated estimation variance. Nonlinear estimators such as the disjunctive kriging and the disjunctive co-kriging estimators can be also be determined.
Various graphics capabilities are included in GEOPACK such as linear or logarithmic line plots, contour plots, and block diagrams. The GEOPACK graphics programs produce intermediate quality output and are intended for quick and easy graphic illustrations. For the highest quality graphic output, GEOPACK can be interfaced with any user-defined graphics package so that custom diagrams can be developed. GEOPACK allows the incorporation of other geostatistical programs, such as GEO-EAS, so unique features of these programs can be accessed from within GEOPACK.
GEOPACK is a menu-driven public domain program that runs under MS-DOS. It includes extensive, on-line help facilities. It is distributed on DOS-formatted disks containing executable code and example data sets. Program documentation consists of installation instructions, a user's manual, and example problems.
SYSTEM REQUIREMENTS
Intel 80i86 based computer, 640 Kb RAM, about 4 Mb of free disk space, DOS 3.0 or higher, CGA, EGA, or VGA graphics; math co-processor optional.
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Developers: S.R. Yates (USDA/ARS) and M.V. Yates (University of California)