NAME¶
d.what.vect - Allows the user to interactively query a vector map
layer at user-selected locations within the current geographic region.
KEYWORDS¶
display, vector
SYNOPSIS¶
d.what.vect
d.what.vect help
d.what.vect [-
1txdfe]
map=
name[,
name,...]
[--
verbose] [--
quiet]
Flags:¶
- -1
-
Identify just one location
- -t
-
Terse output. For parsing by programs
- -x
-
Print information as plain text to terminal window
- -d
-
Print topological information (debugging)
- -f
-
Enable flashing (slower)
- -e
-
Open form in edit mode
- --verbose
-
Verbose module output
- --quiet
-
Quiet module output
Parameters:¶
- map=name[,name,...]
-
Name of existing vector map
DESCRIPTION¶
d.what.vect outputs the category value(s) associated with user-specified
location(s) in user-specified vector map layer(s).
The program activates the mouse, and expects the user to indicate the
location(s) to be queried by depressing a mouse button over desired
location(s) within the current geographic region in the active display frame
on the graphic monitor. Query results from map(s) are by default displayed in
a new monitor, where label values can be added or changed. Using parameter
-x information will be displayed as plain text to terminal window.
This module always reports standard acres, even when the location uses US Survey
feet as the map unit.
EXAMPLE¶
A sample
d.what.vect session is given below. Although it is not necessary
that the user first displays a vector map to be queried in the active display
frame, it is helpful to have a map displayed there for reference.
d.vect map=roads
Displays the
roads vector map layer on the graphics monitor.
d.what.vect map=roads,geology
After typing this, the user moves the mouse to a desired location on the
displayed
roads map layer, and presses the left mouse button to query
the category value of the
roads and the
geology vector map at
this location. The program then outputs the category value of a line type
corresponding to this user-selected map location, for the vector map queried
by the user.
The query may be repeated as often as desired using the left mouse button. The
middle mouse button toggles the flash color. The right button on the mouse is
used to quit the
d.what.vect session.
SEE ALSO¶
d.rast
d.vect
d.what.rast
g.region
v.what
AUTHOR¶
Jim Hinthorne, Central Washington University
Upgrades by Dennis Finch, National Park Service and Radim Blazek, ITC-Irst,
Trento, Italy
Last changed: $Date: 2012-02-25 14:14:51 +0100 (Sat, 25 Feb 2012) $
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