QGIS

QGIS is a free and open source GIS application that can be used for viewing, editing and analysing geospatial data. QGIS supports a very wide range of vector and raster formats and also common API protocols like WMS, WMTS, WCS and WFS.

In supercomputers, QGIS could be used for example to visualize the resulting files from processing with other tools: lastools, R, Python etc.

Available

QGIS is available with following versions:

• 3.31 in Puhti and LUMI, includes also GDAL, GrassGIS, PDAL and SagaGIS.
• 3.22 in Puhti

Usage

QGIS in Puhti

For using QGIS, open it in Puhti web interface:

1. Log in to Puhti web interface.
2. Open Desktop app.
3. After launching the Desktop, double-click QGIS icon for the newest version.

If you want to use older version, open Terminal (Desktop icon) and start QGIS:

module load qgis/3.22
qgis

QGIS in LUMI

Until LUMI web interface is available, QGIS needs to be used with SSH X11 forwarding.

module use /appl/local/csc/modulefiles
module load qgis
qgis

SagaGIS toolbox in QGIS

SagaGIS tools are not available by default with QGIS 3.31 in Processing Toolbox, but can be added with installing Saga Next Gen plug-in. This is a new plug-in and all tools might not work yet.

PyQGIS

It is also possible to access QGIS functionalities from Python without an graphical user interface with the PyQGIS library. Use python3 for accessing PyQGIS libraries.

Puhti QGIS and Allas

QGIS can read files directly from Allas, either using S3 or SWIFT API. Before starting QGIS set up the connection as described in Using geospatial files directly from cloud, inc Allas tutorial and then start QGIS from Terminal.

With large quantities of data in Allas, consider using virtual rasters.

License

QGIS is licensed under the GNU General Public License.

Citation

QGIS.org, 2023. QGIS Geographic Information System. QGIS Association. http://www.qgis.org

Acknowledgement

Please acknowledge CSC and Geoportti in your publications, it is important for project continuation and funding reports. As an example, you can write "The authors wish to thank CSC - IT Center for Science, Finland (urn:nbn:fi:research-infras-2016072531) and the Open Geospatial Information Infrastructure for Research (Geoportti, urn:nbn:fi:research-infras-2016072513) for computational resources and support".

Installation

QGIS was installed to Puhti and LUMI with Tykky's wrap-container functionality using the QGIS Docker image from Dockerhub provided by QGIS community. In LUMI Tykky is named Container wrapper.

wrap-container -w /usr/bin docker://qgis/qgis:latest --prefix install_dir

References

• QGIS homepage
• QGIS tutorials
• Free QGIS training material
• PyQGIS cookbook

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