monitoring: Performs the monitoring component of a r2dRue analysis as specified by its associated parameters
Description
Compute a stepwise regression of vegetation index over aridity index and year order-number. As many points as available hydrological years are made from annual means of these variables, which are first computed from their respective time-series. The results are then saved to corresponding raster files. A batch operation is parameterised from the r2dRue current memory settings (see read2dRfile and showInfo). Rudimentary bars show the computation in progress.Value
- The following raster files are created resulting from the monitoring operation. They belong to the SpatialGridDataFrame class
- indexindividual label for each grid cell
- effect_timerate of change in std.dev. of vegetation index per one std.dev. of time; zero if non significant
- effect_aridrate of change in std.dev. of vegetation index per one std.dev. of aridity; zero if non significant
- veg_responsesignificant response of vegetation index to time (1), aridity (2), both (3) or none (4)
- ta_singlesingle correlation coefficient of time and aridity; zero if non significant
- tv_singlesingle correlation coefficient of time and vegetation index; zero if non significant
- av_singlesingle correlation coefficient of aridity and vegetation index; zero if non significant
- viMe yyyymean annual vegetation index corresponding to year yyyy
- aiMeyyyymean annual aridity index corresponding to year yyyy
- timeyyyydummy raster containing year yyyy in each grid cell
Details
The following r2dRue functions are involved in this computation. Local parameters are left with their respective default values, except those specified in the parameters file as displayed by showInfo:References
del Barrio, G., Puigdefabregas, J. Sanjuan, M.E., Stellmes, M. & Ruiz, A. (2010). Assessment and monitoring of land condition in the Iberian Peninsula, 1989-2000. Remote Sensing of Environment, 114: 1817-1832 http://dx.doi.org/10.1016/j.rse.2010.03.009
Sokal, R. R., & Rohlf, F. J. (1995). Biometry. New York: W.H. Freeman and Co.