t.list - GRASS manual
Author: GRASS Development Team
Description: t.list: Lists space time datasets and maps registered in the temporal database.
Keywords: temporal, map management, list, time

## NAME

t.list - Lists space time datasets and maps registered in the temporal database.

## KEYWORDS

temporal, map management, list, time

## SYNOPSIS

t.list
t.list --help
t.list [-c] [type=string] [temporaltype=name[,name,...]] [order=string[,string,...]] [columns=string[,string,...]] [where=sql_query] [separator=character] [output=name] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

### Flags:

-c
  Print the column names as first row
--overwrite
  Allow output files to overwrite existing files
--help
  Print usage summary
--verbose
  Verbose module output
--quiet
  Quiet module output
--ui
  Force launching GUI dialog

### Parameters:

type=string
  Type of the space time dataset or map, default is strds
  Options: strds, str3ds, stvds, raster, raster_3d, vector
  Default: strds
temporaltype=name[,name,...]
  The temporal type of the space time dataset
  Options: absolute, relative
  Default: absolute,relative
order=string[,string,...]
  Sort the space time dataset by category
  Columns number_of_maps and granularity only available for space time datasets
  Options: id, name, semantic_label, creator, mapset, number_of_maps, creation_time, start_time, end_time, interval, north, south, west, east, granularity
  Default: id
columns=string[,string,...]
  Columns to be printed to stdout
  Columns number_of_maps and granularity only available for space time datasets
  Options: id, name, semantic_label, creator, mapset, number_of_maps, creation_time, start_time, end_time, north, south, west, east, granularity, all
  Default: id
where=sql_query
  WHERE conditions of SQL statement without 'where' keyword used in the temporal GIS framework
  Example: start_time > '2001-01-01 12:30:00'
separator=character
  Field separator character between the output columns
  Special characters: pipe, comma, space, tab, newline
  Default: pipe
output=name
  Name for output file

## DESCRIPTION

t.list lists any dataset that is registered in the temporal database. Datasets are raster, 3D raster and vector maps as well as their corresponding space time datasets (STRDS, STR3DS and STVDS). The type of the dataset can be specified using the type option, default is STRDS. By default all datasets with relative and absolute time are listed. However, the user has the ability to specify a single temporal type with the temporaltype option. The user can define the columns that should be printed for each dataset and the order of the datasets. In addition a SQL WHERE statement can be specified to select a subset of the requested datasets.

## NOTES

The SQL where and sort expression will be applied for each temporal database that was found in accessible mapsets. Hence sorting works only on mapset basis.

Temporal databases stored in other mapsets can be used as long as they are in the user's current mapset search path (managed with g.mapsets).

## EXAMPLES

Obtain the list of space time raster dataset(s):

    t.list strds
    ----------------------------------------------
    Space time raster datasets with absolute time available in mapset <climate_2000_2012>:
    tempmean_monthly@climate_2000_2012

Obtain the list of space time raster datasets in a specific mapset (Note that the target mapset must be in the user's search path):

    # strds in PERMANENT
    t.list strds where="mapset = 'PERMANENT'"
    ----------------------------------------------

    # strds in climate_2000_2012
    t.list strds where="mapset = 'climate_2000_2012'"
    ----------------------------------------------
    Space time raster datasets with absolute time available in mapset <climate_2000_2012>:
    precip_abs@climate_2000_2012
    precipitation@climate_2000_2012
    tempmean@climate_2000_2012

The where option can also be used to list the stds with a certain pattern in their name, i.e. as the pattern option in g.list.

    # strds whose name start with "precip"
    t.list type=strds where="name LIKE 'precip%'"
    ----------------------------------------------
    Space time raster datasets with absolute time available in mapset <climate_1970_2012>:
    precip_abs@climate_1970_2012
    precipitation@climate_1970_2012

The user can also obtain the list of time stamped raster maps. These maps might be registered in strds or not. The output of the following command can vary according to the accessible mapsets specified through g.mapsets.

    t.list raster
    Time stamped raster maps with absolute time available in mapset <climate_2000_2012>:
    2009_01_tempmean@climate_2000_2012
    2009_02_tempmean@climate_2000_2012
    2009_03_tempmean@climate_2000_2012
    ...
    2012_10_tempmean@climate_2000_2012
    2012_11_tempmean@climate_2000_2012
    2012_12_tempmean@climate_2000_2012

## SEE ALSO

g.list, t.create, t.info, t.rast.list, t.rast3d.list, t.vect.list

## AUTHOR

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

## SOURCE CODE

Available at: t.list source code (history)

Latest change: Monday Nov 03 07:16:48 2025 in commit: c96796774942e46bbababcd652d3986d4e295665

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© 2003-2026 GRASS Development Team, GRASS 8.5.1dev Reference Manual