1wxGUI.iscatt(1) GRASS GIS User's Manual wxGUI.iscatt(1)
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7 display, GUI, imagery, scatterplot, plot
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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 â Interactive Scatter Plot Tool). The main idea
14 of the tool is that everything is linked together (scatter plots
15 together and mapwindow with the scatter plots). The main feature of
16 the 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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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.
41 After the area is selected, we can include or exclude it into active
42 category by clicking on the first (plus) respectively second (minus)
43 tool in the editing toolbar. In mapwindow corresponding pixels are
44 shown by the class raster representing selected areas in scatter plots.
45 In this case we can see clouds class raster (blue), forest class raster
46 (green) and water class raster (red).
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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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57 Selection of areas in mapwindow is currently supported only if the tool
58 was launched from Supervised Classification Tool.
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61 wxGUI
62 wxGUI components, r.rescale
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65 See also the user wiki page.
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68 Stepan Turek, Google Summer of Code 2013 (mentor: Martin Landa)
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71 Available at: wxGUI Interactive Scatter Plot Tool source code (history)
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73 Main index | Wxgui index | Topics index | Keywords index | Graphical
74 index | Full index
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76 © 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
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80GRASS 7.8.5 wxGUI.iscatt(1)