diff --git a/raster/r.li/r.li.html b/raster/r.li/r.li.html index b291e184fc3..f96f8f21496 100644 --- a/raster/r.li/r.li.html +++ b/raster/r.li/r.li.html @@ -9,53 +9,66 @@ GRASS logo
+

NAME

+ r.li - Landscape structure analysis package overview. +

KEYWORDS

-raster, landscape structure analysis, landscape metrics, landscape pattern, landscape analysis + +raster, landscape structure analysis, landscape metrics, +landscape pattern, landscape analysis +

DESCRIPTION

-The r.li suite is a toolset for multiscale analysis of landscape structure. -It aims at replacing the r.le suite of modules through a client-server, -multiprocess implementation. External software for quantitative measures of landscape -structure is for example FRAGSTATS (McGarigal and Marks 1995). -

The r.li suite offers a set of patch and diversity indices. -It supports analysis of landscapes composed of a mosaic of -patches, but, more generally, the modules work with any two-dimensional -raster map whose cell values are integer (e.g., 1, 2) or floating point -(e.g., 1.1, 3.2) values. The r.li.setup module has options for -controlling the shape, size, number, and distribution of sampling -areas used to collect information about the landscape structure. -Sampling area shapes can be the entire map or a moving -window of square, rectangular or with circular shape. The size of -sampling areas can be changed, so that the landscape can be analyzed -at a variety of spatial scales simultaneously. Sampling areas may be -distributed across the landscape in a random, systematic, or -stratified-random manner, or as a moving window. -

The r.li modules can calculate a number of measures that produce -single values as output (e.g. mean patch size in the sampling area), -as well as measures that produce a distribution of values as output -(e.g. frequency distribution of patch sizes in the sampling area). The -results are stored as raster maps. - -

The general procedure to calculate an index from a raster map is two-fold: +The r.li suite is a toolset for multiscale analysis of landscape +structure. It aims at replacing the r.le suite of modules +through a client-server, multiprocess implementation. External software +for quantitative measures of landscape structure is for example FRAGSTATS +(McGarigal and Marks 1995). +

+The r.li suite offers a set of patch and diversity indices. It +supports analysis of landscapes composed of a mosaic of patches, but, +more generally, the modules work with any two-dimensional raster map +whose cell values are integer (e.g., 1, 2) or floating point (e.g., 1.1, +3.2) values. The r.li.setup module has options for controlling +the shape, size, number, and distribution of sampling areas used to +collect information about the landscape structure. Sampling area shapes +can be the entire map or a moving window of square, rectangular or with +circular shape. The size of sampling areas can be changed, so that the +landscape can be analyzed at a variety of spatial scales simultaneously. +Sampling areas may be distributed across the landscape in a random, +systematic, or stratified-random manner, or as a moving window. +

+The r.li modules can calculate a number of measures that produce +single values as output (e.g. mean patch size in the sampling area), as +well as measures that produce a distribution of values as output (e.g. +frequency distribution of patch sizes in the sampling area). The results +are stored as raster maps. + +

+The general procedure to calculate an index from a raster map is +two-fold:

    -
  1. run r.li.setup: create a configuration file selecting the parts of - raster to analyze. +
  2. run r.li.setup: create a configuration file selecting the + parts of raster to analyze. -
  3. run r.li.'index' (e.g., r.li.patchdensity) for calculate the selected - index using on the areas selected on configuration file. +
  4. run r.li.'index' (e.g., r.li.patchdensity) for + calculate the selected index using on the areas selected on + configuration file.
-

NOTE

-Also the r.li.daemon has a main function and it can be run, but it is only a -template for development of new indices. +

NOTES

+ +Also the r.li.daemon has a main function and it can be run, but +it is only a template for development of new indices. -The function itself has no meaning, it can be used only for debug. +The function itself has no meaning, it can only be used for debugging. +

EXAMPLE

@@ -67,40 +80,42 @@

EXAMPLE

  1. run 
    -        r.li.setup
+  r.li.setup
  2. The main r.li.setup window is displayed, click on "New" -
  3. Now it is displayed the new configuration window, - enter the configuration file name (e.g., "my_conf", do not use absolute paths) - and the name of raster map (e.g., "geology"). - The other fields are not needed for this configuration. +
  4. Now it is displayed the new configuration window, enter the + configuration file name (e.g., "my_conf", do not use absolute + paths) and the name of raster map (e.g., "geology"). The other + fields are not needed for this configuration.
  5. Click on "Setup sampling frame", select "Whole maplayer" and click "OK"
  6. Click on "Setup sampling areas", select "Moving window" and click "OK"
  7. Click on "Use keyboard to enter moving window dimension"
  8. Select "Rectangle" and enter 5 on "heigth" and "width" fields
  9. Click on "Save settings" -
  10. Close r.li.setup window +
  11. Close the r.li.setup window
+
  • CALCULATE PATCHDENSITY INDEX -
      -
    1. set region settings to geology raster map: +
        +
      1. set the region settings to the "geology" raster map: 
        -	g.region rast=geology -p
+  g.region rast=geology -p
        -
      2. run r.li.patchdensity: + +
      3. run r.li.patchdensity: 
        -        r.li.patchdensity map=geology conf=my_conf out=patchdens
+  r.li.patchdensity map=geology conf=my_conf out=patchdens
    -The resulting patch density is stored in "patchdens" raster map. +The resulting patch density is stored in "patchdens" raster map. You can verify the result for example with contour lines: 
    -r.contour in=patchdens out=patchdens step=5
-d.rast patchdens
-d.vect -c patchdens
+  r.contour in=patchdens out=patchdens step=5
+  d.rast patchdens
+  d.vect -c patchdens
    Note that if you want to run another index with the same area @@ -112,6 +127,7 @@

    EXAMPLE

    configuration file on a 200x200 raster map, then the sample area is 10x10. +

    SEE ALSO

    Core modules: @@ -127,6 +143,7 @@

    SEE ALSO

  • r.li.patchdensity: Calculates patch density index on a raster map, using a 4 neighbour algorithm
  • r.li.patchnum: Calculates patch number index on a raster map, using a 4 neighbour algorithm
    • +
  • Indices based on patch dimension: +
  • Indices based on patch shape: +
  • Indices based on patch edge: +
  • Indices based on patch attributes: + Diversity indices: @@ -159,27 +180,45 @@

    SEE ALSO

  • r.li.simpson: Calculates Simpson diversity index on a raster map
    • +

    ADDING NEW INDICES

    -New indices can be defined and implemented by any C programmer, without having to -deal with all basic functions (IO etc.). The computing architecture and the functions -are clearly separated, thus allowing an easy expandability. Every index is defined -separately, placed in a directory along with its Makefile for compiling it and a file -description.html which describes the index including a simple example of use. + +New indices can be defined and implemented by any C programmer, without +having to deal with all basic functions (IO etc.). The computing +architecture and the functions are clearly separated, thus allowing an +easy expandability. Every index is defined separately, placed in a +directory along with its Makefile for compiling it and a file +<module_name>.html which describes the index including a simple +example of use. +

    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). +Gen. Tech. Rep. PNW-351 + (PDF). +

    AUTHORS

    + Claudio Porta and -Lucio Davide Spano, students of Computer Science -University of Pisa (Italy).
    +Lucio Davide Spano, + students of Computer Science +University of Pisa (Italy).
    Commission from Faunalia Pontedera (PI)
    -

    Last changed: $Date$ +

    +Last changed: $Date$ +

    -

    Main index - Raster index - Topics index - Keywords Index - Full index + +

    +Main index + - Raster index + - Topics index + - Keywords Index + - Full index +