You can find here sources of an extension to QGIS that introduces "virtual layers" which are database views over existing QGIS (vector) layers. These layers can be built by the use of the powerful SQL ...
This plugin adds a GeoJSON layer from SPARQL enpoint queries. The necessary python libs are bundled with the plugin. qgisMinimumVersion = 3.0 The SPARQL Unicorn idea was born at the Computer ...
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