[Qgis-user] New plugin: SDA4PP (Spatial Data Analysis for Point Pattern)

[Volkan Kepoglu]

*
*Dear QGIS Users,*
*

The plugin performs analysis on point pattern spatial data. It uses spatial
analytical structure of R. The plugin communicates with R through RPy2.

*The repo and docs are here:*

http://ggit.metu.edu.tr/~volkan/plugins.xml<http://ggit.metu.edu.tr/%7Evolkan/plugins.xml>

*Used components' version:*

QGIS 1.0.2 / 1.1.0

Python 2.5.2

RPy2 2.0.3

R 2.9.0

NumPy 1.2.1

R packages: (spatstat_1.15-2, maptools_0.7-22, rgdal_0.6-7)

 *Following tools are available in the plugin:*

*Interactive Identify Tool:* returns the value of overlapping raster and
vector layers in one window. It gives more information about feature than
the standard identify tool in QGIS. This tool is also available in the repo
as separate plugin.

*Quadrat analysis:* A method of point pattern analysis in which the study
region is sampled using a set of similar shapes (quadrats) and counting the
number of events in each. Analysis of the resulting quadrat counts can help
determine whether the pattern is evenly spaced or clustered.

*F function:* A function in point pattern analysis based on the cumulative
frequency of the shortest distance between events in a point pattern and a
set of randomly placed locations in the study area.

*G function:* A function in point pattern analysis based on the cumulative
frequency of the shortest inter- event distances between events in a point
pattern.

*K function:* A function in point pattern analysis based on all the
inter-event distances between events in a point pattern.

*Kernel density estimation:* A method of density estimation making use of
kernel functions. For each event to be included in the density estimates a
kernel function is used to 'spread' its effect across space.

*Tested OS:*

XP professional Service Pack 3

XP professional 64 bit edition service pack 2 (qgis should be installed
under C:\Program Files, but not in C:\Program Files (x86). this is required
for this plugin, may not be for others.)

Ubuntu Desktop 8..10 intrepid ibex (R 2.7)


 Please send bugs, opinions and suggestions;

to me: vkepoglu at gmail.com

or to my advisor: Assoc. Prof. Sebnem Duzgun duzgun at metu.edu.tr


-- 
Regards,
Volkan Osman Kepoglu
PhD Candidate
GGIT Department in METU,
Ankara, Turkey.
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