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wxGUI RLi Setup

DESCRIPTION

       The  g.gui.rlisetup  is  a  wxGUI  component which allows the user to create a configuration file for the
       analytical r.li modules. For a general introduction, see the r.li overview.
       The configurations are raster map independent, it means that you can use a file created on a  raster  map
       for analyze any other you have.
       The program is completely interactive and uses a GUI to help you in your choices.

   Analysis methods
       Definition of creation of sampling area:

           •   Whole map layer: use entire area selected above,

           •   Regions: select one to many subareas via mouse,

           •   Sample units: automated selection of sampling area (for details see below)

               •   Random nonoverlapping,

               •   Systematic contiguous,

               •   Systematic noncontiguous,

               •   Stratified random,

               •   Centered over sites (vector points).

           •   Moving window: rectangular or circular with size

       Definition of region for analysis:

           •   Whole map layer: entire map (current region),

           •   Keyboard setting: based on keyboard selection for region definition,

           •   Draw the sampling frame: based on interactive region selection via mouse.

   Usage details
       The startup window shows your configuration files, you can:

       TODO: description below needs further updates

       1      View/Edit  (Load  a  file)  from the shown list: the configuration is shown in a small text editor
              window.  Configuration files are saved in the folder  C:\Users\userxy\AppData\Roaming\GRASS7\r.li\
              (MS-Windows) or $HOME/.r.li/ (GNU/Linux) (the file name can be defined by the user). The output or
              an analysis can either be a new raster map (in case of using a "moving window" analysis) or be  an
              ASCII text file (when not performing a "moving window" analysis) containing the result.  Such text
              file will be saved in the folder C:\Users\userxy\AppData\Roaming\GRASS7\r.li\output\  (MS-Windows)
              or $HOME/.grass7/r.li/output/ (GNU/Linux).
              All dimensions are percentages of raster rows or columns.

       2      Create a new configuration file: used for creating a new configuration file in an interactive way,
              in three steps:

       2.1    Choose file name and maps to use for setting:

           •   Name for new configuration file(required): the name of new configuration file

           •   Raster map name to use to select areas (required): the name of  raster  map  used  for  selecting
               sampling areas

           •   Vector map to overlay (optional): name of a vector map used for selecting sampling areas

       2.2    Set  the  sampling  frame.  The sample frame is a rectangular area which contains all the areas to
              analyze. It can be defined in three ways:

           •   Whole map layer: the sample frame is the whole map

           •   Keyboard setting: the user enters the coordinates in cells of upper left corner of sampling frame
               and its length in rows and columns.

           •   Draw the sample frame: the user draws the sample frame on map using mouse.

       2.3    Set  the  sample  areas.  The sample areas are simply the areas to analyze. They can be defined in
              five ways (see the picture below):

           •   Whole map layer: the sample area is the whole sample frame

           •   Regions: the user enters the number of areas and then draws them using mouse.

           •   Sample units: they are areas of rectangular or circular shape. The user  can  define  them  using
               keyboard or mouse.

               •   keyboard: the user define the shape of sample unists and their disposition:

                   •   Random non overlapping: the user specifies the number of sample units and they are placed
                       in a random way at runtime. It is guaranteed that the areas do not intersect themselves.

                   •   Systematic contiguous: the defined sample is placed covering the sample  frame,  side  by
                       side across rows.

                   •   Systematic  non  contiguous:  the  same  as above, but here ever rectangle is spaced from
                       another by a specified number of cells.

                   •   Stratified random: the sample frame is divided in n  strats  of  rows  and  m  strats  of
                       columns (n and m are given by user), then the specified number of sample areas are placed
                       in a random way, one for every m*n areas defined by strats.

                   •   Centered over sites: the sample areas are placed into  sample  frame  centering  them  on
                       points in site file.

               •   mouse: the user chooses the shape and then draws the specified number of sample areas on map.

           •   Moving  Window:  the user defines a rectangular or circular area, it is moved over all the raster
               increasing only of a cell for every move(in columns if possible, if not in rows).  It produces  a
               new raster containing the result of all analysis.

           •   Select  areas  from  the  overlaid  vector  map:  the  sample areas are defined by the vector map
               selected above.  For every cat in vector map, the procedure prompts the  user  if  they  want  to
               include  it as sample area.  The resulting configuration file can be used only with the specified
               raster map, and the procedure can be used only if whole map layer is selected as sampling frame.

       3      Remove a file the selected file is deleted from the available configuration files.

       4      Help: open this help text.

       5      Close module window.

NOTES

       Configuration files are raster map independent because areas are saved using relative coordinates.

       Screenshots of the wizard window frames:

          g.gui.rlisetup:  First  frame  of  wizard  for  selecting   g.gui.rlisetup: Frame for selecting maps
       existing configuration files or creating a new one

         g.gui.rlisetup: Frame for inserting sampling areas            g.gui.rlisetup:  Frame  for  defining  rectangular moving
                                                                    window

         g.gui.rlisetup: Frame for defining circular moving window    g.gui.rlisetup: Frame for choosing the sampling frame with
                                                                    keyboard

         g.gui.rlisetup: Frame for drawing the sampling frame         g.gui.rlisetup: Summary frame before saving

EXAMPLES

   Moving window analysis on full region
       TODO: update examples to new g.gui.rlisetup dialog:

       Example for a 7x7 moving window analysis on full region, the output is a raster map:

       Click on "New", then:

           •   Configuration file name: "movwindow7"

           •   Raster map name to use to select areas: "forests"
       1. Setup sampling frame:

           •   Define a sampling frame (region for analysis): "Whole map layer", then "OK"
       2. Setup sampling frame

           •   Define sampling areas: "Moving window", then "OK"

           •   Then click on "Use keyboard to define moving window dimension"
       Select type of shape:

           •   [x] Rectangular

           •   Width size (in cells)?: "7"

           •   Height size (in cells)?: "7"

           •   Then "Save settings"
       3. Save settings: click on button
       (4.) Close

       Now an anaysis can be performed using one of the analytical modules, e.g.
       g.region raster=forests -p
       r.li.patchdensity input=forests conf=movwindow7 output=forests_p_dens7
       r.univar forests_p_dens7
       The result is the new raster map "forests_p_dens7" which shows (in this example) the patch density of the
       forest areas.
       See the respective modules for further examples.

   Whole region analysis
       Example for a whole region analysis, the output is a text file: Click on "New", then:

           •   Configuration file name: "whole_region"

           •   Raster map name to use to select areas: "lsat7_2000_40"
       1. Setup sampling frame:

           •   Define a sampling frame (region for analysis): "Whole map layer", then "OK"
       2. Setup sampling frame

           •   Define sampling areas: "Whole map layer", then "OK"
       3. Save settings: click on button
       (4.) Close

       Now an anaysis can be performed using one of the analytical modules, e.g.
       g.region raster=lsat7_2002_40 -p
       r.li.shannon input=lsat7_2000_40 conf=whole_region output=lsat7_2000_40_shannon
       The result is the new text file "forests_p_dens7" (stored in folder $HOME/.r.li/output/.
       See the respective modules for further examples.

SEE ALSO

        r.li - package overview
       r.li.daemon

        Old r.le suite manual (1992)

        wxGUI
       wxGUI components

REFERENCES

       McGarigal, K., and B. J. Marks.  1995.  FRAGSTATS:  spatial  pattern  analysis  program  for  quantifying
       landscape structure. USDA For. Serv.  Gen. Tech. Rep. PNW-351. (PDF)

AUTHOR

       Luca Delucchi
       Rewritten from r.li.setup by Claudio Porta and Lucio Davide Spano

SOURCE CODE

       Available at: wxGUI RLi Setup source code (history)

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