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Run the OSGeo4W setup and choose the advanced installation.However, to have the full choice of available geoalgorithms provided by QGIS, we recommend to use the advanced settings of the OSGeo4W Network installer: This installation is more or less equivalent to the standalone QGIS-installation. Nevertheless, it should be easy enough to follow our steps. Apparently, OSGeo4w automatically uses the language in accordance with the IP-address. We are sorry, that our installer uses a German dialog. To install OSGeo4W, the easiest way is to to use the Express installation:
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This installer is available on the QGIS installer page as well as on the OSGeo4W-website. However, if you would like to use even more third-party providers (e.g., GDAL, GEOS, Taudem, OTB, PostGIS, etc.), we recommend to use the OSGeo4W Network installer. This will install QGIS along with the third-party providers GRASS and SAGA. The first option is the Standalone Installer from the QGIS installer page. There are at least two options to install QGIS on Windows in such a way that RQGIS can access QGIS.
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