NAME
d.zoom - Allows the user to change the current geographic
region settings interactively, with a mouse.
(GRASS Display Program)
SYNOPSIS
d.zoom
d.zoom help
d.zoom [-fhj]
[rast=name[,name,...]]
[vector=name[,name,...]]
[site=name[,name,...]]
[zoom=value]
DESCRIPTION
d.zoom allows the user to interactively adjust the settings
of the current geographic region using a pointing device such as
a mouse.
Like g.region,
d.zoom re-defines the settings of the geographic
region. However, d.zoom allows the user to change
the current region settings interactively, by either
outlining the new region perimeter with a mouse, unzoom
or pan the region. The graphics display is updated by the module.
OPTIONS
Flag:
- -f
- Full menu with pan and zoom options.
- -h
- Handheld mode, zoom by window with left button only.
- -j
- Just redraw given maps using default colors.
Parameter:
- rast=name[,name,...]
- Name of raster map(s)
- vector=name[,name,...]
- Name of vector map(s)
- site=name[,name,...]
- Name of site map(s)
Options: zoom
- zoom=value
- magnification: >1.0 zooms in, <1.0 zooms out
options: 0.001-1000.0
default: 1.0
After the user types the command d.zoom a mouse-button menu will appear
directing the user.
Additionally the region settings can be modified by
running g.region.
The user may also alter the current geographic region by running the "region"
option of the d.display program.
NOTES
Although it is not necessary that the user display a map in
the active display frame before running d.zoom, it
is helpful to do this for reference.
SEE ALSO
d.display
d.erase
d.pan
d.rast
d.sites
d.vect
g.region
AUTHOR
Michael Shapiro,
U.S. Army Construction Engineering
Research Laboratory
Improvements by Huidae Cho and Markus Neteler
Last changed: $Date: 2002/04/29 14:15:08 $