I would like to know the architecture of QGIS: relationships between QGIS and other open sources, and what elements are implemented in the QGIS.

Usually, There is a diagram showing the architecture of a software such as arcobjects. Even it is simple like Geotools's architecture, it is useful to understand internal structure of a software.

  • Dont think the moderators will approve of this type of question. Did You check here: qgis.org/en/about-qgis.html
    – Ger
    Feb 7, 2013 at 10:55
  • 3
    Do you have an example, as in links, of what you had in mind. If we don't have one for QGIS I'm sure we could make one at some stage.
    – Nathan W
    Feb 7, 2013 at 11:07

2 Answers 2


Update on top: There is this French language diagram by Thomas Gratier

enter image description here

and there is this one by Tim Sutton (but it's old):

enter image description here

  • Can you give any references for this diagram? Is there an updated version available?
    – PKG
    Jul 6, 2015 at 11:22
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    It used to be on the QGIS website but I think it has been taken down since it's so old. You can still find a reference online in this thesis written at the Univ of Zurich opengis.ch/publications/msc-thesis-uzh/html
    – underdark
    Jul 6, 2015 at 16:31

As per your question (Like comparing to Arc-objects UML diagram no such diagram exists or may be under processing)

But check out this link it might be useful for you.

For Architecture_ Roadmap. Hope it will help you..

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