d.rast.num.1grass - Man Page

Overlays cell category values on a raster map displayed in the active graphics frame.


display, map annotations, raster


d.rast.num --help
d.rast.num [-af] map=name  [text_color=name]   [grid_color=name]   [precision=integer]   [font=string]   [path=name]   [charset=string]   [--help]  [--verbose]  [--quiet]  [--ui]



Align grids with raster cells


Get text color from cell color value


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


map=name [required]

Name of raster map


Text color
Either a standard color name or R:G:B triplet
Default: black


Grid color
Either a standard color name, R:G:B triplet, or "none"
Default: gray


Number of significant digits (floating point only)
Options: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Default: 1


Font name


Path to font file


Text encoding (only applicable to TrueType fonts)


d.rast.num overlays cell category values onto a raster map layer displayed on the user’s graphics monitor. Category values will be displayed in the text color given and scaled to fit within a single cell. A grid outlining each map cell will also be overlain in a user-specified color, unless it has been set to "none".

If no grid color is given the default will be used. If no map layer is specified, the program will use whatever raster map layer is currently displayed in the active frame on the graphics monitor.

If the -f flag is given the displayed number will take on the color of the base map in that cell.


The user is advised to set the current region to a relatively small area (i.e., less than 100 rows by 100 columns); otherwise, the individual cells being displayed will be small and the category value associated with each will be difficult to see. No data cells are indicated with "Null".


A) Distance from the streams network (North Carolina sample dataset):

g.region raster=streams_derived -p
r.grow.distance input=streams_derived distance=dist_from_streams
d.rast.num dist_from_streams -a

Euclidean distance from the streams network in meters (detail, numbers shown with d.rast.num)

See Also

d.frame, d.grid, d.rast, d.rast.arrow, d.rast.edit, g.region, r.slope.aspect


Raghavan Srinivasan, and Chris Rewerts,
Agricultural Engineering, Purdue University

Source Code

Available at: d.rast.num source code (history)

Accessed: Wednesday Jan 24 21:11:49 2024

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