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I have shapefile with polygons and I test topology - overlaps, duplicates and gaps. I tested it in QGIS and now I have to describe algorithms, which uses QGIS for this rules. I must write research algorithms. I finded just general description: http://docs.qgis.org/2.0/en/docs/gentle_gis_introduction/topology.html and http://qgis.org/en/docs/user_manual/plugins/plugins_topology_checker.html but I can´t find algorithms.

  • Could you elaborate on what you have tried, what you have found online and what exactly that you need assistance with? – Martin Apr 29 '14 at 15:10
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QGIS code is hosted on Github. I suggest you start your search there, e.g. https://github.com/qgis/QGIS/search?p=2&q=topology&ref=cmdform

If you know exactly which tool you want to research, it should be easier to find the corresponding piece of code.

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