t.rast.null

Manages NULL-values of a given space time raster dataset.

Command linePython (grass.script)

t.rast.null input=name [setnull=string [,string,...]] [null=float] [where=sql_query] [nprocs=integer] [--verbose] [--quiet] [--qq] [--ui]

Example:

t.rast.null input=name

grass.script.run_command("t.rast.null", input, setnull=None, null=None, where=None, nprocs=1, verbose=False, quiet=False, superquiet=False)

Example:

gs.run_command("t.rast.null", input="name")

Parameters

Command linePython (grass.script)

input=name [required]
    Name of the input space time raster dataset
setnull=string [,string,...]
    List of cell values to be set to NULL
null=float
    The value to replace the null value by
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'
nprocs=integer
    Number of r.null processes to run in parallel
    Default: 1
--help
    Print usage summary
--verbose
    Verbose module output
--quiet
    Quiet module output
--qq
    Very quiet module output
--ui
    Force launching GUI dialog

input : str, required
    Name of the input space time raster dataset
    Used as: input, strds, name
setnull : str | list[str], optional
    List of cell values to be set to NULL
null : float, optional
    The value to replace the null value by
where : str, optional
    WHERE conditions of SQL statement without 'where' keyword used in the temporal GIS framework
    Example: start_time > '2001-01-01 12:30:00'
    Used as: sql_query
nprocs : int, optional
    Number of r.null processes to run in parallel
    Default: 1
verbose: bool, optional
    Verbose module output
    Default: False
quiet: bool, optional
    Quiet module output
    Default: False
superquiet: bool, optional
    Very quiet module output
    Default: False

DESCRIPTION

t.rast.null manages NULL-values of the input space time raster dataset.

The setnull parameter is used to specify values in the ranges to be set to NULL. A range is either a single value (e.g., 5.3), or a pair of values (e.g., 4.76-34.56). Existing NULL-values are left NULL, unless the null argument is requested.

The null parameter eliminates the NULL value and replaces it with the given value. This argument is applied only to existing NULL values, and not to the NULLs created by the setnull argument.

EXAMPLES

Set specific values (0,-1 and -2) of a space time raster dataset to NULL:

    t.rast.null input=MY_INPUT_DATASET setnull=0,-1,-2

SEE ALSO

r.null

AUTHOR

Luca Delucchi, Fondazione Edmund Mach

SOURCE CODE

Available at: t.rast.null source code (history)
Latest change: Thursday Feb 20 13:02:26 2025 in commit 53de819