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NAME

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

KEYWORDS

temporal, raster, null data

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

Table of contents

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

Last changed: $Date: 2018-03-21 16:53:05 +0100 (Wed, 21 Mar 2018) $

SOURCE CODE

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


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© 2003-2018 GRASS Development Team, GRASS GIS 7.4.2svn Reference Manual