NAME
t.rast.null - Manages NULL-values of a given space time raster dataset.
KEYWORDS
temporal,
raster,
null data,
parallel
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
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.
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
r.null
Luca Delucchi, Fondazione Edmund Mach
SOURCE CODE
Available at:
t.rast.null source code
(history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual