Figure 3: Data series of measured and forecasted displacements of a landslide, assuming that the current date is November 20, 2010, from August 10, 2010 to November 20, 2010; the landslide displacement meter measured a data series that contains 11 measured displacements of a landslide, based on the formulas (1)–(8) and 11 measured displacements. It can calculate and forecast landslide displacement value in the next 10 days (November 20, 2010–November 30, 2010 and November 30, 2010–December 10, 2010). Black solid circles denote the measured displacement of a landslide; black solid triangle points denote the forecasted displacement of the landslide.