## GRASS GIS 7.8.7 Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS GIS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPLed), image processing and geographic information system (GIS).

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### Display commands:

d.barscale | Displays a barscale on the graphics monitor.
d.colorlist | Outputs a list of all available display colors.
d.colortable | Displays the color table associated with a raster map layer.
d.correlate | Prints a graph of the correlation between raster maps (in pairs).
d.erase | Erases the contents of the active graphics display frame with user defined color.
d.font | Selects the font in which text will be displayed on the user's graphics monitor.
d.fontlist | Lists the available fonts.
d.frame | Manages display frames on the user's graphics monitor.
d.geodesic | Displays a geodesic line, tracing the shortest distance between two geographic points along a great circle, in a longitude/latitude data set.
d.graph | Program for generating and displaying simple graphics on the display monitor.
d.grid | Overlays a user-specified grid in the active display frame on the graphics monitor.
d.his | Displays the result obtained by combining hue, intensity, and saturation (HIS) values from user-specified input raster map layers.
d.histogram | Displays a histogram in the form of a pie or bar chart for a user-specified raster map.
d.info | Displays information about the active display monitor.
d.labels | Displays text labels (created with v.label) to the active frame on the graphics monitor.
d.legend | Displays a legend for a 2D or 3D raster map in the active frame of the graphics monitor.
d.legend.vect | Displays a vector legend in the active graphics frame.
d.linegraph | Generates and displays simple line graphs in the active graphics monitor display frame.
d.mon | Controls graphics display monitors from the command line.
d.northarrow | Displays a north arrow on the graphics monitor.
d.out.file | Saves the contents of the active display monitor to a graphics file.
d.path | Finds shortest path for selected starting and ending node.
d.polar | Draws polar diagram of angle map such as aspect or flow directions
d.profile | Plots profile of a transect.
d.rast.arrow | Draws arrows representing cell aspect direction for a raster map containing aspect data.
d.rast.edit | Edits cell values in a raster map.
d.rast | Displays user-specified raster map in the active graphics frame.
d.rast.leg | Displays a raster map and its legend on a graphics window
d.rast.num | Overlays cell category values on a raster map displayed in the active graphics frame.
d.redraw | Redraws the content of currently selected monitor.
d.rgb | Displays three user-specified raster maps as red, green, and blue overlays in the active graphics frame.
d.rhumbline | Displays the rhumbline joining two longitude/latitude coordinates.
d.shade | Drapes a color raster over an shaded relief or aspect map.
d.text | Draws text in the active display frame on the graphics monitor using the current font.
d.title | Create a TITLE for a raster map in a form suitable for display with d.text.
d.to.rast | Saves the contents of the active display monitor to a raster map.
d.vect.chart | Displays charts of vector data in the active frame on the graphics monitor.
d.vect | Displays user-specified vector map in the active graphics frame.
d.vect.thematic | Displays a thematic vector map in the active graphics frame.
d.what.rast | Allows the user to interactively query raster map layers at user-selected locations.
d.what.vect | Allows the user to interactively query vector map layers at user-selected locations.
d.where | Identifies the geographic coordinates associated with point locations given in display coordinates.

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© 2003-2022 GRASS Development Team, GRASS GIS 7.8.7 Reference Manual