NAME
d.measure - Measures the lengths and areas of features drawn by the user in the active display frame on the graphics monitor.
SYNOPSIS
d.measure
d.measure help
d.measure [-smk] [c1=string] [c2=string]
Flags:
- -s
- Suppress clear screen
- -m
- Output in meters
- -k
- Output in kilometers
Parameters:
- c1=string
- line color 1
- Options: red,orange,yellow,green,blue,indigo,violet,white,black,gray,brown,magenta,aqua,grey
- Default: white
- c2=string
- line color 2
- Options: red,orange,yellow,green,blue,indigo,violet,white,black,gray,brown,magenta,aqua,grey
- Default: black
DESCRIPTION
d.measure provides the user with an interactive
way to measure the lengths and areas of lines and polygons
drawn by the user in the active frame on the graphics
monitor. Lines and polygons are drawn using a pointing
device (mouse). Each line segment is drawn in colors
c1 and c2. A mouse button menu indicates
that the user can find out the geographic coordinates of
the cursor location, draw line segments between
user-specified vertices, and quit d.measure. Lines
and polygons are defined by the series of vertices marked
by the user. If more than two successive vertices are
drawn, d.measure prints the area encompassed
(d.measure will assume the area is closed even if
the user has not joined the first and last vertices). Line
lengths are stated in the same units as those of the
current LOCATION. In a XY-LOCATION, where no units are
available, d.measure prints a warning and gives results
without units. Areas are stated in hectares, square
miles, square meters and square kilometers.
Lines and polygons drawn using d.measure will
overlay (not overwrite) whatever display currently appears
in the active frame on the graphics monitor. The user can,
for example, run
d.rast or
d.vect prior to running
d.measure, and use raster and/or vector maps
as a backdrop.
NOTES
d.measure uses all segments drawn by the user when computing area.
If the user draws an area within another area, the combined
area of both regions will be output.
SEE ALSO
d.frame
d.graph
d.mapgraph
d.rast
d.vect
d.where
AUTHORS
James Westervelt,
Michael Shapiro,
U.S. Army Construction Engineering
Research Laboratory
Last changed: $Date: 2004/08/10 08:35:01 $
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