Tag Archives: Georeferencing

Georeferencing a scanned map with QGIS

Some times you need to have vector data that haven’t been digitized yet, like some old maps with building footprints or street lines. We can scan a map, georeference it in QGIS, and then digitize those features to create new vector layers. Scanned maps don’t contain spatial reference information, so to digitize we need to reference the raster in a specific coordinate system.

In this example we will georeference a map of the city of Barcelona with the layout of the old medieval walls (XIII-XIV) with QGIS.

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