r.support.1grass - Man Page

Allows creation and/or modification of raster map layer support files.


raster, metadata


r.support --help
r.support [-bsnd] map=name  [title=phrase]   [history=phrase]   [units=string]   [vdatum=string]   [source1=phrase]   [source2=phrase]   [description=phrase]   [raster=string]   [loadhistory=name]   [savehistory=name]   [semantic_label=phrase]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]



Delete the semantic label


Update statistics (histogram, range)


Create/reset the null file


Delete the null file


Allow output files to overwrite existing files


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


map=name [required]

Name of raster map


Title for resultant raster map


Text to append to the next line of the map’s metadata file


Text to use for map data units


Text to use for map vertical datum


Text to use for data source, line 1


Text to use for data source, line 2


Text to use for data description or keyword(s)


Raster map from which to copy category table


Text file from which to load history


Text file in which to save history


Semantic label e.g. S2_8A


r.support allows the user to create and/or edit raster map support information. Editing of raster map color tables, category labels, header, history, semantic label elements and title is supported. Category labels can also be copied from another raster map.

Raster band management

Raster semantic label concept is similar to dimension name in other GIS and remote sensing applications. Most common usage will be assigning a remote sensing platform sensor band ID to the raster, although any identifier is supported. Raster semantic label is suggested to work with imagery classification tools.


These examples are based on the North Carolina dataset, more specifically the landuse raster map. Copy the landuse map to the current mapset

g.copy raster=landuse,my_landuse

Update statistics

r.support -s map=my_landuse

Update Title

r.support map=my_landuse title="Landuse copied"

Append to History Metadata

r.support map=my_landuse history="Copied from PERMANENT mapset"

Update Units Display

r.support map=my_landuse units=meter

Set semantic label

Note: landuse map doesn’t confirm to CORINE specification. This is an example only.

r.support map=my_landuse semantic_label=CORINE_LULC


If metadata options such as title or history are given the module will run  non-interactively. If only the map name is given r.support will run interactively within a terminal shell and the user with be prompted for input.

Freeform metadata information is stored in a "hist" file which may be appended to by using the history option. Currently this is limited to 50 lines of text with a maximum line length of 78 characters. Any input larger than this will be wrapped to the next line. All other metadata strings available as standard options are limited to 79 characters.

See Also

r.category, r.describe, r.info, r.null, r.region, r.report, r.timestamp


Micharl Shapiro, CERL: Original author
Brad Douglas: GRASS 6 Port
M. Hamish Bowman: command line enhancements
Markus Neteler: category copy from other map
Maris Nartiss: semantic label management

Source Code

Available at: r.support source code (history)

Accessed: Tuesday Mar 19 11:02:02 2024

Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

© 2003-2024 GRASS Development Team, GRASS GIS 8.3.2 Reference Manual


GRASS 8.3.2 GRASS GIS User's Manual