VISUAL BASIC PROGRAMS FOR ONE, 2 OR 3-DIMENSIONAL GEOSTATISTICAL ANALYSIS

Two previously published FORTRAN-77 programs, FGAM and JCBLOK, are rew ritten in Visual Basic 5.0 for 32-bit Windows 95/NT and educational ap plications. Each program is applicable to spatial data representing on e, two or three-dimensions. Graphics are added for displaying computed variograms and color density slices of kriging results within the sam e windows used to launch the programs. Dynamic array allocation is aut omatically invoked by the programs without the need for a user to inte rvene, thus enabling efficient memory management independent of data s et size. If analyzing one-dimensional strings of data (profiles), frac tal dimensions are computed for four-lag increments of the variogram, thus enabling a scale-dependent analysis. Only the raw, spatial data n eed to be in a separate file because program options are set interacti vely using mouse click events motivated by the design of the window fo r each program. Simplified Geo-EAS input format is accommodated for th ese files, or generic files are accommodated having allowable record l engths up to 100 values per record. (C) 1998 Elsevier Science Ltd. All rights reserved