NAME

d.grid - Overlays a user-specified grid in the active display frame on the graphics monitor.

KEYWORDS

display, cartography, graticule, grid

SYNOPSIS

d.grid
d.grid --help
d.grid [-agwcdfnbt] size=value [origin=east,north] [direction=string] [width=float] [color=name] [border_color=name] [text_color=name] [bgcolor=name] [fontsize=integer] [--help] [--verbose] [--quiet] [--ui]

Flags:

-a: Align the origin to the east-north corner of the current region
-g: Draw geographic grid (referenced to current ellipsoid)
-w: Draw geographic grid (referenced to WGS84 ellipsoid)
-c: Draw ’+’ marks instead of grid lines
-d: Draw ’.’ marks instead of grid lines
-f: Draw fiducial marks instead of grid lines
-n: Disable grid drawing
-b: Disable border drawing
-t: Disable text drawing
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

size=value [required]: Size of grid to be drawn (in map units)
0 for north-south resolution of the current region. In map units or DDD:MM:SS format. Example: "1000" or "0:10"
origin=east,north: Lines of the grid pass through this coordinate
Default: 0,0
direction=string: Draw only east-west lines, north-south lines, or both
Options: both, east-west, north-south
Default: both
width=float: Grid line width
color=name: Grid color
Either a standard color name or R:G:B triplet
Default: gray
border_color=name: Border color
Either a standard color name or R:G:B triplet
Default: black
text_color=name: Text color
Either a standard color name or R:G:B triplet
Default: gray
bgcolor=name: Background color
Either a standard color name, R:G:B triplet, or "none"
Default: none
fontsize=integer: Font size for gridline coordinate labels
Options: 1-72
Default: 9

DESCRIPTION

d.grid overlays a grid of user-defined size and color in the active display frame on the graphics monitor. The grid can be created as a standard rectangular grid or a geographic grid.

If the user provides a -g flag a geographic (projected) grid will be drawn. With the -g flag the size argument accepts both decimal degrees and colon separated ddd:mm:ss coordinates (eg. 00:30:00 for half of a degree). A geographic grid cannot be drawn for a latitude/longitude or XY projection.

Colors may be standard named GRASS colors (red, green, aqua, etc.) or a numerical R:G:B triplet, where component values range from 0-255. Grid color can be set with option color. Options text_color and bgcolor set the color of the text and its background.

The grid drawing may be turned off by using the -n flag.
The border drawing may be turned off by using the -b flag.
The coordinate text may be turned off by using the -t flag.

To draw grid lines at different intervals, e.g. at high latitudes, you can run the module twice, once with direction=east-west at one interval size, and again with direction=north-south at another interval size.

EXAMPLES

To draw a red geographic grid with 30 minute grid spacing, run one of the following commands:

d.grid -g size=00:30:00 color=red

or

d.grid -g size=0.5 color=255:0:0

Figure: Showing a geographic grid in red line color To draw a blue standard rectangular grid at a 500 (meter) spacing run the following:

d.grid size=500 color=blue

Figure: Showing a rectangular grid in blue line color

AUTHORS

James Westervelt, U.S. Army Construction Engineering Research Laboratory
Geogrid support: Bob Covill
Border support: Markus Neteler
Text and RGB support: Hamish Bowman
Background color implemented as part of GSoC 2016 by Adam Laza, CTU in Prague

SOURCE CODE

Available at: d.grid source code (history)

Accessed: Monday Apr 01 03:07:12 2024