t.rast.null - GRASS GIS manual

NAME

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

KEYWORDS

SYNOPSIS

t.rast.null

t.rast.null --help

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

Flags:

--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

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

DESCRIPTION
EXAMPLES
SEE ALSO
AUTHOR

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

AUTHOR

Luca Delucchi, Fondazione Edmund Mach

SOURCE CODE

Available at: t.rast.null source code (history)