Gokul Gopan
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QGIS Geometry Generator expression QGIS Geometry Generator output

QGIS Geometry Generator โ€” RegioStar

QGISGeometry generatorCartographyRegioStar

Overview

This project uses QGIS Geometry Generator expressions to create dynamic, data-driven cartographic visualisations of Germany's RegioStar regional classification system. Geometry generators allow complex visual representations to be computed on-the-fly without creating new datasets.

Methodology

RegioStar Data Integration

Imported RegioStar classification data and joined to NUTS/municipality boundaries in QGIS.

Geometry Generator Expressions

Wrote custom QGIS geometry generator expressions to create proportional symbol overlays and dynamic polygon transformations driven by classification values.

Map Composition

Composed final map layout using QGIS Print Layout with multiple geometry-generated layers for a clean, multi-dimensional visualisation.

Tools & Technologies

  • QGIS Geometry Generator (QGIS Expression Engine)
  • RegioStar classification data (BBSR)
  • QGIS Print Layout for cartographic output

Outcome

Produced a visually distinctive cartographic output that communicates regional classification hierarchies more effectively than standard choropleth mapping, demonstrating advanced QGIS symbology techniques.

Link

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