d.where is an interactive program that
allows the user, using the pointing device (mouse), to
identify the geographic coordinates associated with point
locations within the current geographic region in the
active display frame on the graphics monitor.
Each mouse click will output the easting and northing of the point
currently located beneath the mouse pointer.
A mouse-button menu is presented so the user knows which
mouse buttons to use. The output is always printed to the
terminal screen; if the output is redirected into a file,
it will be written to the file as well.
Left: where am i
Middle: draw to/from here
Right: quit this
The left mouse button prints the coordinates at the selected point,
the middle mouse button allows to query two points (they are connected by a
line for convenience). By using the right mouse button the module is left.
This program uses the current geographic region setting and active frame.
It is not necessary, although useful, to have displayed a map in the current
frame before running d.where. The -d flag allows the user to
optionally output latitude/longitude coordinates pair(s) in decimal degree
rather than DD:MM:SS format. The -w flag is only valid
if a datum is defined for the current location.
If the -f flag is given the x,y frame coordinates of the active display
monitor will be returned (as a percentage, 0,0 is bottom left).
U.S. Army Construction Engineering
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