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wxGUI

DESCRIPTION

       wxGUI  is a native Graphical User Interface (GUI) for GRASS GIS. Its main features include
       displaying geographical data in 2D and 3D, calling GRASS GIS modules, and interacting with
       data.

   Overview
       The GUI is composed of three main components:

           ·   The  Layer  Manager includes map layer management, integrated command-line prompt,
               and command output window tab.

           ·   The Map Display Window integrates basic tools for zooming, panning, data querying,
               and map elements (north arrows, barscale, etc.). Each display window is associated
               with its own set of map layers in the layer manager. The user may  start  multiple
               map  displays  during a session. The map layers for each display are grouped under
               different tabs in the Layer Manager.

           ·   Module dialogs enable running GRASS modules.

   Layer Manager
       The Layer Manager provides an interactive graphical interface for  creating  and  managing
       GRASS  displays.  There is a toolbar to manage displayed map layers, a layer tree frame in
       which map layers for display are organized, a command output window tab,  and  interactive
       command line prompt. On Linux and Windows platforms, the layer manager also has a menu bar
       with a set of pull-down menus for  all  GRASS  GIS  functions  (analysis,  file  I/O,  GIS
       configuration  and  management);  on  a Mac, the GRASS functions menu is at the top of the
       screen.
       Figure: Layer Manager screenshot on Ubuntu

       The top left button of the toolbar opens a new Map Display Window. Each map display has  a
       unique  set  of layers to display and region settings. Other toolbar buttons add layers of
       different types for display in the selected  map  display  window.  There  are  additional
       buttons for saving or opening workspace file, and others.

       Map layers are listed in the window frame below the toolbar. Layers can include raster and
       vector maps, vector labels, and commands (where any GRASS command can be written).  Layers
       are  displayed  as arranged in the layer tree: the bottom layer is displayed first and the
       top layer is displayed last, as if the layers were a series of stacked overlays.

       The check box to the left of each layer makes it active  or  inactive  for  display.  Only
       active  layers are displayed/redisplayed when the display button is pressed. Layers can be
       organized into groups; entire groups can be activated or deactivated  for  display.  Layer
       tree  composition  can  be  saved  to  a workspace file and opened in subsequent sessions,
       restoring all layers and their display options.

       A right mouse click on a layer or left clicking the button to the right of the layer opens
       a  dropdown  menu  with options to remove or rename the layer (not the actual map), change
       its display properties (d.rast and d.vect options such as color, symbol, etc.),  show  its
       metadata (r.info, v.info) or attributes, if applicable.

       A  left  mouse double click on a layer opens GUI for its display options These options are
       those for the d.* command for each layer type (d.rast, d.vect, or d.grid, for example).

   Layer Manager Toolbar
             Start new map display
           Opens a new map display and creates empty layer tree tab in Layer Manager.

             Create new workspace
           Removes all layers from the layer tree and creates a new, empty tree where new  layers
           can be added.

             Open existing workspace file
           Opens an previously saved workspace file, containing a set of display layers and their
           option settings.

             Save current workspace to file
           Saves current set of layers and their options to a workspace file.

             Load map layers into workspace
           Loads selected raster or vector maps into current layer tree.

             Add raster map layer
           Adds raster map to layer tree, see d.rast.

             Add various raster map layers (RGB, HIS, shaded relief...)
           Opens a dropdown menu that allows user to select to:

            Add 3D raster map layer
           Adds 3D raster map to layer tree.

            Add RGB raster layer
           Combines and displays three raster maps defined as red, green, and  blue  channels  to
           create an RGB color map, see d.rgb.

            Add HIS raster layer
           Combines  and  displays  two  or  three  raster  maps  defined  as hue, intensity, and
           (optionally) saturation channels to create a color map, see d.his.

            Add shaded relief raster map layer
           Adds shaded relief raster map layer, see r.relief and d.shade.

            Add raster arrows layer
           Adds map of raster cells with directional arrows drawn. Arrow direction and length are
           determined  by separate aspect/directional map and (optional) slope/intensity map, see
           d.rast.arrow.

            Add raster numbers layer
           Adds map of raster cells with numbers representing the cell values, see d.rast.num.

             Add vector map layer
           Adds a vector map layer, see d.vect.

             Add various vector map layers (thematic, chart...)
           Opens a dropdown menu that allows user to select to:

            Add thematic area (choropleth) map layer       (for all vector types)
           Adds layer for thematic display values from a numeric attribute column associated with
           a  vector  map.  Options  include:  thematic  display  type (graduated colors or point
           sizes), methods for creating display intervals, SQL query of attribute column to limit
           vector  objects to display, control of point icon types and sizes, control of thematic
           color schemes, creation of legend for thematic map, and saving the results of thematic
           mapping to a ps.map instructions file for later printing, see d.vect.thematic.

            Add thematic chart layer (for vector points)
           Adds  layer  in  which  pie or bar charts can be automatically created at vector point
           locations. Charts display values from selected columns  in  the  associated  attribute
           table.  Options  include: chart type, layer and attributes to chart, chart colors, and
           chart size (fixed or based on attribute column), see d.vect.chart.

             Add group
           Adds an empty group. Layers can then be added to the group.

             Add grid or vector labels overlay
           Opens a dropdown menu that allows user to select to:

            Add overlay grids and lines
           Adds layer to display regular grid (for all locations) see d.grid

            Add labels layer for vector objects (from existing labels file)
           Add a layer of text from a labels file for vector objects  created  with  the  v.label
           module.  A labels file can also be created with a text editor, see d.labels.

            Add geodesic line layer
           Add  layer  to  display  geodesic  line  for  latitude/longitude  locations  only, see
           d.geodesic

            Add rhumbline layer
           Add  layer  to  display  rhumblines  (for  latitude/longitude  locations  only),   see
           d.rhumbline.

            Add command layer
           Adds  a  layer  in  which  a  GRASS GIS command or command list can be entered.  For a
           command list use the semi-colon (";") symbol as a separator.  For example:
           d.rast soils;d.rast -o roads;d.vect streams col=blue
           Note that when an option of the command contains spaces, you  need  to  "escape"  them
           with the backslash (’\’) character, for example:
           d.text text=Population\ density

             Delete selected layer
           Removes selected map layer or map layer group from layer tree.

             Edit vector maps
           Opens vector digitizer to allow editing selected vector map.

             Show attribute table
           Opens attribute table manager for selected vector map.

             Import raster or vector data

            Import raster data
           Import  selected  raster  data  into  GRASS using r.in.gdal and load them into current
           layer tree.

            Link external raster data
           Link selected external raster data as GRASS raster maps (using  r.external)  and  load
           them into current layer tree.

            Set raster output format
           Define external format for newly created raster maps (see r.external.out for details)

            Import vector data
           Import selected vector data into GRASS using v.in.ogr and load them into current layer
           tree.

            Link external vector data
           Link selected external vector data as GRASS vector maps (using  v.external)  and  load
           them into current layer tree.

            Set vector output format
           Define external format for newly created vector maps (see v.external.out for details)

             Raster Map Calculator
           Launches Raster Calculator GUI front-end for r.mapcalc.

             Graphical Modeler
           Launches graphical modeler to create models and run them.

             Georectifier Tool
           Launches GCP Manager to create, edit, and manage Ground Control Points.

             Cartographic Composer
           Launches Cartographic Composer to create interactively hardcopy map outputs.

             Show GUI settings
           Opens dialog to change GUI settings.

             Show help
           Opens GRASS manual.

   Map Display Window
       The map display window includes toolbar that can be docked and undocked from the window, a
       map canvas where a map composition of one or more layers is  displayed,  and  a  statusbar
       with information about the geographic region of the maps displayed.
       Figure: Map Display screenshot on Ubuntu

       Each  Map  Display  Window  has  a unique layer tree (in the layer manager) and geographic
       region setting. At the top of the window is a toolbar with buttons to manage  the  map  in
       the  display  (render,  erase,  zoom  and  pan),  for  query  and  and  analysis (distance
       measurement, profile, and histogram creation), to overlay map elements  onto  the  display
       (scale, north arrow, legend, and custom text), and to export or print the display.

       In  the  statusbar,  the  user  can choose to display the geographic coordinates under the
       cursor, current geographical region  extent,  computational  region  (including  graphical
       visualization  in map display), map display geometry (number of rows, columns, resolution)
       and map scale. Checking the render button in the statusbar will cause the map  display  to
       update  automatically  any  time  a map is added to, removed from, or changed in its layer
       tree.

       It is important to  note  that  zooming  in  any  display  will  have  no  effect  on  the
       ’computational  region’  setting  (set  with g.region). Only by selecting the ’Set current
       region to match display’ item in the zoom menu (in  the  map  display  toolbar)  will  the
       current display extents be copied to the computational region extents.

   Map Display Toolbar
             Re-render display
           Re-renders  all  active map layers regardless of whether they have changed or not, see
           d.redraw.

             Erase display
           Erases the currently selected map display to a white background, see d.erase.

             Pointer
           Select arrow cursor for map display.

             Select features from vector map
           Interactively select features from given vector map. Selection can be stored to a  new
           vector map, see v.what and v.extract.

             Query raster/vector maps
           Query  selected raster, RGB raster (all three map channels will be queried), or vector
           map(s) using the mouse. Map(s) must be  selected  before  query.   Vector  charts  and
           thematic  vector maps cannot be queried. The results of the query will be displayed in
           a dialog.  See r.what, v.what.

             Pan
           Interactive selection of a new center of view in the active display monitor. Drag  the
           pan  cursor while pressing the left mouse button to pan.  Panning changes the location
           of the region displayed but not the size of the  area  displayed  or  the  resolution.
           Panning  does  not  affect  the  computational  region  for  other  GIS processes, see
           g.region.

             Zoom in
           Interactive zooming with the mouse in the active display monitor.  Drawing  a  box  or
           just  click with the mouse (left button) and zoom-in cursor causes the display to zoom
           in so that the area defined by the box fills the display. The map  resolution  is  not
           changed.  Clicking  with  the  zoom-in  cursor  causes  the display to zoom in by 30%,
           centered on the point where the mouse is clicked. Zooming resets  the  display  region
           extents  (both  size  and  location  of  area  displayed).  It  does  not  affect  the
           computational region for other GIS processes, see g.region.

             Zoom out
           Interactive zooming with the mouse in the active display monitor.  Drawing  a  box  or
           just click with the mouse (left button) and zoom-out cursor causes the display to zoom
           in so that the area displayed shrinks to fill the area defined by  the  box.  The  map
           resolution  is  not  changed.  Clicking with the zoom-out cursor causes the display to
           zoom out by 30%, centered on the point where the mouse is clicked. Zooming resets  the
           display  region extents (both size and location of area displayed). It does not affect
           the computational region for other GIS processes, see g.region.

             Zoom to selected map(s)
           Set zoom extent based on selected raster or vector maps. Zooming  resets  the  display
           region  extents  (both  size  and  location of area displayed). It does not affect the
           computational region for other GIS processes, see g.region.

             Zoom to computational region extent
           Set zoom extent based on the current computational region extent, see g.region.

             Return to previous zoom
           Returns to the previous zoom extent. Up to 10 levels of zoom back are maintained,  see
           g.region.

             Various zoom options
           Opens a dropdown menu that allows user to:

           ·   Zoom to default region

           ·   Zoom to saved region. Zooms to previously saved named region.

           ·   Set  computational  region  extent  from  display.   The computational region (the
               mapset’s WIND file) is set to match the current display extent  (does  not  change
               the resolution), see g.region.

           ·   Set  computational  region  extent interactively.  The computational region is set
               simply by drawing a box with the left mouse button on Map Display.

           ·   Set computational region from named region.  This option  doesn’t  affect  display
               zoom.

           ·   Save display geometry to named region

           ·   Save computational region to named region

             Analyze menu
           Opens a dropdown menu with:

                 Measure distance
           Interactive  measurement of lengths defined with the mouse. The length of each segment
           and the cumulative length of all segments measuered is displayed in the command output
           window  frame.  Lengths  are measured in the current measurement unit. Double-click to
           switch off measuring.

                 Measure area
           Interactive measurement of area defined with  the  mouse.  Area  is  measured  in  the
           current measurement unit. Double-click to switch off measuring.

                 Profile surface map
           Interactively create profile of a raster map. Profile transect is drawn with the mouse
           in map display. The profile may be of the displayed map or  a  different  map.  Up  to
           three maps can be profiled simultaneously.

                 Create bivariate scatterplot of raster maps
           Interactively create bivariate scatterplot of raster maps.

                 Create histogram of raster map
           Displays histogram of selected raster map or image in new window.

                 Create histogram with d.histogram
           Displays histogram of selected raster map or image in new window, see d.histogram.

                 Vector network analysis tool
           See tool’s manual page.

             Add overlay
           opens a dropdown menu that allows user to

               Add raster map legend
           Adds layer to display with legend of selected raster map, see d.legend.

               Add scalebar
           Adds  layer  to  display  a scalebar. Options include scalebar placement (using screen
           coordinates or a mouse), scalebar format, and scalebar colors, see d.barscale.

               Add north arrow
           Adds layer to display a north arrow. Options  include  north  arrow  placement  (using
           screen coordinates or a mouse), north arrow style and color, see d.northarrow.

               Add text layer
           Adds  layer to display a line of text using default GRASS font (selected with d.font).
           Options include: text placement (screen coordinates);  and  text  size,  bolding,  and
           color, see d.text.

             Save display to graphic file
           Save the visible image in map display to different raster graphic formats.

             Print map
           Prints  map  on  system native printer or PostScript device; saves visible map display
           (including PostScript text and labels) to PDF or EPS file.

       Map display mode
           Opens a dropdown menu for selecting different display mode

       2D view
           Normal GIS display. All active layers are composited and displayed in 2D mode.

       3D view
           Experimental replacement for NVIZ. Displays all active layers in 3D perspective  using
           OpenGL.  A  new  control  panel  opens  to  manage the 3D view. 3D view can be zoomed,
           panned, rotated, and tilted. The vertical exaggeration of rasters and 3D  vectors  can
           be  set.  Various  color  and  lighten  settings  are possible. Not yet functional for
           Windows platforms

       Vector digitizer
           Puts display into vector digitizing mode and opens a new digitizing toolbar. The  user
           can digitize a new vector map or edit an existing map.

       Raster digitizer
           Puts  display into raster digitizing mode and opens a new digitizing toolbar. The user
           can digitize a new raster map or edit an existing map.

   Keyboard short-cuts
   Layer Manager
       Ctrl+Tab
           Switch ’Layers’ and ’Console’ tab

       Ctrl+Q
           Quit

       Ctrl+R
           Render map in all map displays Workspace

       Ctrl+N
           Create new workspace

       Ctrl+O
           Load workspace from file

       Ctrl+S
           Close workspace Layers

       Ctrl+Shift+L
           Add multiple raster or vector map layers to current map display

       Ctrl+Shift+R
           Add raster map layer to current map display

       Ctrl+Shift+V
           Add vector map layer to current map display

       Ctrl+W
           Close current map display Console

       Tab
           Show command tooltips

       Esc
           Hide command tooltips

       Ctrl+Space
           Show auto-complete suggestions

       Up/Down
           List command history

       Enter
           Run command

       Ctrl++
           Increase font size (numerical keyboard plus key)

       Ctrl+-
           Decrease font size (numerical keyboard minus key)

       Ctrl+mouse wheel
           Increase or decrease font size

   Map Display
       F11
           Fullscreen mode (toggle on/off)

       Ctrl+W
           Close map display

       Ctrl+R
           Render map (re-renders map)

       F5
           Render map (re-renders map)

   Starting the graphical user interface
       If the wxGUI is not the default user interface, it can defined as default by typing at the
       GRASS GIS command line prompt:
       g.gui -u wxpython
       Alternatively   it   may   be  defined  in  GISRC  file  ($HOME/.grass7/rc  on  GNU/Linux,
       $APPDATA\GRASS7\rc on MS Windows) by GUI variable
       GUI: wxpython
       or by the environmental variable GRASS_GUI.

       The GUI can be quit by selecting the ’File -> Exit GUI’ menu item.   On  MS  Windows  when
       GRASS  is  launched  without  an  interactive  command line this will end the entire GRASS
       session. In other cases the terminal window will remain running; type exit at the  command
       prompt to end the GRASS session.

       The GUI can be restarted from the GRASS command line prompt by typing
       g.gui
       or
       g.gui wxpython
       To restart with previously saved workspace file:
       g.gui wxpython workspace=file.gxw

       The  user  can  also start GRASS from the shell command line with the wxGUI specifying the
       -gui (or -wxpython) switch:
       grass74 -gui

   Background information
       wxGUI is a native Graphical User Interface (GUI) for GRASS GIS  written  in  Python  using
       wxPython library.

SEE ALSO

        wxGUI components
       wxGUI module dialogs wxGUI toolboxes (menu customization)

       See also wxGUI wiki page (especially various video tutorials), and Quick wxGUI Tutorial.

AUTHORS

       Martin  Landa,  FBK-irst  (2007-2008),  Trento,  Italy,  and Czech Technical University in
       Prague, Czech Republic
       Michael Barton, Arizona State University, USA
       Daniel Calvelo Aros
       Jachym Cepicky
       Markus Metz, Germany
       Anna Kratochvilova, OSGeoREL, Czech Technical University in Prague, Czech Republic
       Vaclav Petras, OSGeoREL, Czech Technical University in Prague, Czech Republic
       Stepan Turek, OSGeoREL, Czech Technical University in Prague, Czech Republic
       Tereza Fiedlerova, OSGeoREL, Czech Technical University in Prague, Czech Republic
       Matej Krejci, OSGeoREL, Czech Technical University in Prague, Czech Republic
       Icons created by Robert Szczepanek, Poland (Git repository)

       $Date: 2017-11-12 20:37:57 +0100 (Sun, 12 Nov 2017) $

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       © 2003-2018 GRASS Development Team, GRASS GIS 7.4.0 Reference Manual