1wxGUI.iscatt(1)             GRASS GIS User's Manual            wxGUI.iscatt(1)
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wxGUI Interactive Scatter Plot Tool

KEYWORDS

7       display, GUI, imagery, scatterplot, plot
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DESCRIPTION

10       Interactive  Scatter  Plot  Tool allows analyzing group of raster maps.
11       The tool is integrated into Supervised  Classification  Tool  (see  the
12       screen  shot below).  Also it is possible to launch it from Map Display
13       Window (Analyze map → Interactive Scatter Plot Tool).  The main  idea
14       of  the  tool  is that everything is linked together (scatter plots to‐
15       gether and mapwindow with the scatter plots).  The main feature of  the
16       tool is the interactivity, which allows user to:
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18           •   work  with  multiple  plots,  which  represents multiple raster
19               bands combinations,
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21           •   highlight plotted points in open  scatter  plots  according  to
22               currently  chosen  pixels  for  classes  by it’s training areas
23               (supported only in Supervised Classification Tool),
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25           •   be able to define areas in plots and the  tool  will  highlight
26               pixels  in map display window and corresponding points in other
27               plots,
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29           •   plot of confidence ellipses.
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TOOL CONTROLS LAYOUT

32       If editing mode is activated (the green polygon tool in  toolbar),  the
33       areas  which were selected in the scatter plots are highlighted. In the
34       image you can see this area for scatter plot of bands B_6,  B_7  inside
35       the ellipse.  Opacity and color of the selected area can be set in set‐
36       tings. The area corresponds to the active class (in this case  clouds).
37       Selected areas are subset of areas, which belongs to the category.
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39       In  the editing mode it is possible to select certain area by the poly‐
40       gon, which can be created and edited by tools in editing toolbar.   Af‐
41       ter the area is selected, we can include or exclude it into active cat‐
42       egory by clicking on the first (plus) respectively second (minus)  tool
43       in  the editing toolbar. In mapwindow corresponding pixels are shown by
44       the class raster representing selected areas in scatter plots. In  this
45       case we can see clouds class raster (blue), forest class raster (green)
46       and water class raster (red).
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NOTES

49       The tool can analyze only integer (CELL) rasters.  It works with 8  bit
50       range  smoothly.   The  tool is capable of processing data up to 12 bit
51       range, however it is not recommended open many scatter plots  in  12/11
52       bit  mode.  It could require significant amount of memory and plot ren‐
53       dering time can be longer.  Analyzing of raster data with higher  range
54       is not recommended.  The raster range can be lowered using r.rescale.
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KNOWN ISSUES

57       Selection of areas in mapwindow is currently supported only if the tool
58       was launched from Supervised Classification Tool.
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SEE ALSO

61        wxGUI
62       wxGUI components, r.rescale
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65       See also the user wiki page.
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AUTHOR

68       Stepan Turek, Google Summer of Code 2013 (mentor: Martin Landa)
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SOURCE CODE

71       Available at: wxGUI Interactive Scatter Plot Tool source code (history)
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73       Accessed: Saturday Jan 21 17:40:37 2023
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75       Main index | Wxgui index | Topics index | Keywords  index  |  Graphical
76       index | Full index
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78       © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
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82GRASS 8.2.1                                                    wxGUI.iscatt(1)