d.rast.num.1grass man page

d.rast.num — 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] [--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


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

Last changed: $Date: 2015-05-01 12:27:34 +0200 (Fri, 01 May 2015) $

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