1g.gui.rdigit(1)             GRASS GIS User's Manual            g.gui.rdigit(1)
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NAME

6       g.gui.rdigit  - Interactive editing and digitizing of raster maps.
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KEYWORDS

9       general, GUI, raster, editing, digitizer
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SYNOPSIS

12       g.gui.rdigit
13       g.gui.rdigit --help
14       g.gui.rdigit  [create=name]   [base=name]   [type=string]   [edit=name]
15       [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]
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17   Flags:
18       --overwrite
19           Allow output files to overwrite existing files
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21       --help
22           Print usage summary
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24       --verbose
25           Verbose module output
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27       --quiet
28           Quiet module output
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30       --ui
31           Force launching GUI dialog
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33   Parameters:
34       create=name
35           Name of new raster map to create
36           Name for output raster map
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38       base=name
39           Name of base raster map
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41       type=string
42           Type of raster map to be created
43           Storage type for resultant raster map
44           Options: CELL, FCELL, DCELL
45           Default: CELL
46           CELL: Integer
47           FCELL: Single precision floating point
48           DCELL: Double precision floating point
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50       edit=name
51           Name of existing raster map to edit
52           Name of input raster map
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KEYWORDS

55       display, GUI, raster, editing, digitizer
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DESCRIPTION

58       Raster Digitizer is a simple tool to quickly  draw  lines,  areas,  and
59       circles  and save these features in a raster map. It is accessible from
60       the Map Display toolbar (from the combo box on the right).
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62       Raster Digitizer currently allows you to:
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64           •   draw polygons, lines and points
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66           •   set category value of the feature you are drawing
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68           •   set feature width (width of currently digitized line or  diame‐
69               ter of a digitized point in map units)
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71           •   create  a  new  raster from scratch or from an already existing
72               raster
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74           •   undo edits and save edits before leaving the digitizer
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76       The typical workflow includes these steps:
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78       1      Set computational region as needed.
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80       2      Switch to Raster Digitizer and select a map to  create.   Select
81              either a new raster or create a new raster from existing raster,
82              also select raster type (CELL, FCELL, DCELL)
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84       3      Specify category value and width before drawing a feature
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86       4      Specify digitizing tool (area, line, point)
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88       5      Start digitizing and when you want to finish area or  line,  use
89              right click
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91       6      Change color of temporary overlay depending on your needs
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93       7      Set different category and repeat
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95       8      At any point you can use Undo or Save
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97       9      If  existing  raster is used for the new raster, digitized areas
98              will respect the color table, but you can always  set  different
99              color table.
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NOTES

102       Raster  Digitizer respects computational region including the currently
103       set resolution.
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EXAMPLES

106       In the following figures we start with  elev_lid792_1m  raster  map  in
107       North carolina sample dataset and digitize two buildings, one rectangu‐
108       lar and one with circular footprint.   Both  buildings  have  the  roof
109       level at 130 m. We set the width when digitizing the point to 50 meters
110       which results in the building having 50 m in  diameter.   When  we  are
111       done  with  digitizing,  we save the result and explore cast shadows of
112       the buildings with r.sun module:
113       g.region raster=elev_lid792_1m
114       # now create elev_edited raster by digitizing and save
115       r.slope.aspect elevation=elev_edited slope=elev_slope aspect=elev_aspect
116       r.sun elevation=elev_edited aspect=elev_aspect slope=elev_slope beam_rad=beam day=172 time=6
117       Figure: Steps to digitize new buildings on elev_lid792_1m raster map.
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SEE ALSO

120        wxGUI
121       wxGUI components,
122       r.in.poly (backend of digitizer),
123       g.gui.vdigit
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AUTHORS

126       Anna Petrasova, NCSU GeoForALL Laboratory
127       Tomas Zigo (standalone module)
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SOURCE CODE

130       Available at: wxGUI Raster Digitizer source code (history)
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132       Accessed: Mon Jun 20 16:48:30 2022
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134       Main index | Wxgui index | Topics index | Keywords  index  |  Graphical
135       index | Full index
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137       © 2003-2022 GRASS Development Team, GRASS GIS 8.2.0 Reference Manual
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141GRASS 8.2.0                                                    g.gui.rdigit(1)
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