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GRASS GIS 8.3.2 Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS GIS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPLed), image processing and geographic information system (GIS). Go to temporal introduction | topics

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Temporal commands

t.connect		Prints/sets general temporal GIS database connection for current mapset.
t.copy		Creates a copy of a space time raster dataset.
t.create		Creates a space time dataset.
t.info		Lists information about space time datasets and maps.
t.list		Lists space time datasets and maps registered in the temporal database.
t.merge		Merges several space time datasets into a single space time dataset.
t.rast.accdetect		Detects accumulation patterns in temporally accumulated space time raster datasets created by t.rast.accumulate.
t.rast.accumulate		Computes cyclic accumulations of a space time raster dataset.
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.algebra		Apply temporal and spatial operations on space time raster datasets using temporal raster algebra.
t.rast.colors		Creates/modifies the color table associated with each raster map of the space time raster dataset.
t.rast.contour		Produces a space time vector dataset of specified contours from a space time raster dataset.
t.rast.export		Exports space time raster dataset.
t.rast.extract		Extracts a subset of a space time raster datasets.
t.rast.gapfill		Replaces gaps in a space time raster dataset with interpolated raster maps.
t.rast.import		Imports space time raster dataset.
t.rast.list		Lists registered maps of a space time raster dataset.
t.rast.mapcalc		Performs spatio-temporal mapcalc expressions on temporally sampled maps of space time raster datasets.
t.rast.neighbors		Performs a neighborhood analysis for each map in a space time raster dataset.
t.rast.out.vtk		Exports space time raster dataset as VTK time series.
t.rast.series		Performs different aggregation algorithms from r.series on all or a subset of raster maps in a space time raster dataset.
t.rast.to.rast3		Converts a space time raster dataset into a 3D raster map.
t.rast.to.vect		Converts a space time raster dataset into a space time vector dataset
t.rast.univar		Calculates univariate statistics from the non-null cells for each registered raster map of a space time raster dataset.
t.rast.what		Sample a space time raster dataset at specific vector point coordinates and write the output to stdout using different layouts
t.rast3d.algebra		Apply temporal and spatial operations on space time 3D raster datasets using temporal 3D raster algebra.
t.rast3d.extract		Extracts a subset of a space time 3D raster dataset.
t.rast3d.list		Lists registered maps of a space time raster3d dataset.
t.rast3d.mapcalc		Performs r3.mapcalc expressions on maps of sampled space time 3D raster datasets.
t.rast3d.univar		Calculates univariate statistics from the non-null cells for each registered 3D raster map of a space time 3D raster dataset.
t.register		Assigns timestamps and registers raster, vector and raster3d maps in a space time dataset.
t.remove		Removes space time datasets from temporal database.
t.rename		Renames a space time dataset
t.sample		Samples the input space time dataset(s) with a sample space time dataset and print the result to stdout.
t.select		Select maps from space time datasets by topological relationships to other space time datasets using temporal algebra.
t.shift		Shifts temporally the maps of a space time dataset.
t.snap		Snaps temporally the maps of a space time dataset.
t.support		Modifies the metadata of a space time dataset.
t.topology		Lists temporal topology of a space time dataset.
t.unregister		Unregisters raster, vector and raster3d maps from the temporal database or a specific space time dataset.
t.upgrade		Upgrades the version of the temporal database.
t.vect.algebra		Apply temporal and spatial operations on space time vector datasets using temporal vector algebra.
t.vect.db.select		Prints attributes of vector maps registered in a space time vector dataset.
t.vect.export		Exports a space time vector dataset as GRASS GIS specific archive file.
t.vect.extract		Extracts a subset of a space time vector dataset.
t.vect.import		Imports a space time vector dataset from a GRASS GIS specific archive file.
t.vect.list		Lists registered maps of a space time vector dataset.
t.vect.observe.strds		Observes specific locations in a space time raster dataset over a period of time using vector points.
t.vect.univar		Calculates univariate statistics of attributes for each registered vector map of a space time vector dataset
t.vect.what.strds		Stores raster map values at spatial and temporal positions of vector points as vector attributes.

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GRASS 8.3.2 GRASS GIS User's Manual