FAST SEQUENTIAL INDICATOR SIMULATION - BEYOND REPRODUCTION OF INDICATOR VARIOGRAMS

Sequential Indicator Simulation (SIS), although widely used, is relati vely slow, and requires tedious inference of a large number of indicat or variogram models. SIS is designed only to estimate class proportion s and to reproduce indicator variogram models; the statistics of the c ontinuous attribute being simulated, z-histogram and variogram, may be poorly reproduced. Several implementations of the SIS algorithm are p roposed resulting in better reproduction of statistics yet with better CPU performance.