[Qgis-developer] GSOC Weekly Report 1: Schematization Plug-in for QGIS

[Nishith Maheshwari]

Hi all,
Please find the GSOC Weekly report 1 in the following email.


*Weekly report 1*

*What was done this week?*

   - During the bonding period it was decided after discussions with the
   mentors that we would create the plug-in by integrating it with the already
   existing functions of Processing
Toolbox<http://www.qgis.org/en/docs/user_manual/processing/toolbox.html>.
   So this week mostly took to getting acquainted with various different
   functionalities of the toolbox.


   - For simplification of geometry,
QgsTopologyPreservingSimplifier<http://www.qgis.org/api/classQgsTopologyPreservingSimplifier.html>class
will be used as the implementation is similar to Douglas Peucker
   algorithm and also gives us the advantage of preserving the topology. There
   were some errors in the output for some data sets but otherwise it is
   working good enough. Those errors are reduced if we are merging small
   segments of the lines and then splitting them at the intersection before
   simplification.

*What is the plan for next week?*

   - Implement a basic plug-in which removes objects smaller than a certain
   threshold. This would be a good start and will provide an initial setup for
   the plug-in and act as a base for it. This function for removing the
   smaller objects might create topology errors, so this would be available as
   an option in the plug-in.


More details at : http://hub.qgis.org/wiki/quantum-gis/nishithm


Thanks and regards,

Nishith Maheshwari

Lab for Spatial Informatics

IIIT Hyderabad, India
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