QGIS-final  3_6_1
About: QGIS (Quantum GIS) is a Geographic Information System that supports vector, raster, and database formats. 3.6.x series.
  Fossies Dox: QGIS-final-3_6_1.tar.gz  ("inofficial" and yet experimental doxygen-generated source code documentation)  

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies QGIS-final-3_6_1.tar.gz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).
QGIS

Introduction

QGISQGIS is a user friendly Open Source Geographic Information System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports vector, raster, and database formats. QGIS is licensed under the GNU General Public License. QGIS lets you browse and create map data on your computer. It supports many common spatial data formats (e.g. ESRI ShapeFile, geotiff). QGIS supports plugins to do things like display tracks from your GPS. QGIS is Open Source software and its free of cost (download here). We welcome contributions from our user community in the form of code contributions, bug fixes, bug reports, contributed documentation, advocacy and supporting other users on our mailing lists and forums. Financial contributions are also welcome.

You can also download this documentation or a Qt help file for offline use.

There is also a Python version of the documentation available.

Earlier versions of the API

See Backwards Incompatible Changes for information about incompatible changes to API between releases.

Earlier versions of the documentation are also available on the QGIS website: 3.2, 3.0, 2.18 (LTR), 2.14 (LTR), 2.12, 2.10, 2.8 (LTR), 2.6, 2.4, 2.2, 2.0, 1.8, 1.7 and 1.6

QgsQuick library documentation

See QGIS Quick Documentation for information about QGIS Quick (QML) components library

Mailing Lists

For support we encourage you to join our mailing lists for users and developers.

Bug Reporting

If you think you have found a bug, please report it using our bug tracker. When reporting bugs, please include some contact information in case we need help with replicating your issue.

IRC channel

Some QGIS users and developers can also often be found in the #qgis IRC channel on irc.freenode.net.