NAME

       g.gui.mapswipe  - Interactively compares two maps by swiping a visibility bar.

KEYWORDS

       general, GUI, display

SYNOPSIS

       g.gui.mapswipe
       g.gui.mapswipe --help
       g.gui.mapswipe    [first=name]    [second=name]    [mode=string]    [--help]   [--verbose]
       [--quiet]  [--ui]

   Flags:
       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       first=name
           First (top/right) raster map

       second=name
           Second (bottom/left) raster map

       mode=string
           View mode
           Options: swipe, mirror
           Default: swipe
           swipe: swiping the upper map layer to show the map layer below
           mirror: synchronized maps side by side

DESCRIPTION

       The Map Swipe is a wxGUI component which allows the  user  to  interactively  compare  two
       raster  maps  of  the  same  area  by revealing different parts of the raster maps.  It is
       useful e.g. for comparing raster maps from different  time  periods.   Map  Swipe  can  be
       launched from the menu File -> Map Swipe.

       Map Swipe allows you to:

           •   switch orientation of the swipe line (horizontal or vertical)

           •   zooming, panning

           •   automatically  load  maps  when opening Map Swipe with two selected raster maps in
               Layer Manager

           •   compare 2 raster maps or load different combinations of raster and vector maps and
               set transparency (advanced mode)

           •   save display to graphics file

           •   display text labels with map names

           •   choose  between  ’swipe’  mode  (default)  and  ’mirror’  mode  (synchronized maps
               displayed side by side)

           •   change the appearance of cursor in ’mirror’ mode (available in Map Swipe settings)
       Pre and post disaster images of the tsunami in Japan in 2011. The upper MODIS image  taken
       on  February  26,  2011, shows the coastline under normal conditions while the lower MODIS
       image on March 13, 2011, shows a clear view  of  tsunami  flooding  along  the  coastline.
       Water, black and dark blue in these false-color images, still covers the ground as much as
       five kilometers (three miles) from the coast.  Source: Earth Observatory/NASA

SEE ALSO

        wxGUI
       wxGUI components

       See also the user wiki page.

AUTHOR

       Anna Kratochvilova, Czech Technical University in Prague, Czech Republic

SOURCE CODE

       Available at: wxGUI Map Swipe source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual