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NAME

       d.where   -  Identifies  the geographic coordinates associated with point locations in the
       active frame on the graphics monitor.

KEYWORDS

       display

SYNOPSIS

       d.where
       d.where help
       d.where [-1dlwf]  [--verbose]  [--quiet]

   Flags:
       -1
           One mouse click only

       -d
           Output lat/long in decimal degree

       -l
           Output lat/long referenced to current ellipsoid

       -w
           Output lat/long referenced to WGS84 ellipsoid using  datum  transformation  parameters
           defined in current location (if available)

       -f
           Output frame coordinates of current display monitor (percentage)

       --verbose
           Verbose module output

       --quiet
           Quiet module output

DESCRIPTION

       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.

       Mouse buttons:
            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.

NOTES

       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).

SEE ALSO

       d.what.rast
       d.what.vect
       g.region
       v.what.rast
       v.what.vect

AUTHORS

       James Westervelt,
       Michael Shapiro,
       U.S. Army Construction Engineering Research Laboratory

       Last changed: $Date: 2006-04-29 15:53:44 +0200 (Sat, 29 Apr 2006) $

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