GRASS GIS 8.5.0dev Reference Manual: Topic aggregation

Topic: aggregation

r.series	Makes each output cell value a function of the values assigned to the corresponding cells in the input raster map layers.
t.rast.aggregate.ds	Aggregates data of an existing space time raster dataset using the time intervals of a second space time dataset.
t.rast.aggregate	Aggregates temporally the maps of a space time raster dataset by a user defined granularity.
t.rast.neighbors	Performs a neighborhood analysis for each map in a space time raster dataset.
t.rast.series	Performs different aggregation algorithms from r.series on all or a subset of raster maps in a space time raster dataset.

See also the corresponding keyword aggregation for additional references.