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Free and Open Source GIS Ramblings

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Free and Open Source GIS Ramblings title: Free and Open Source GIS Ramblings | written by Anita Graser aka Underdark

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Notebooks in QGIS

Finally it’s here: Jupyter notebooks inside QGIS. I don’t know about you but I’ve been hoping for someone to get around to doing this for quite a while.

Qiusheng Wu published the first version of the


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QGIS to (Geo)Pandas – part 3

The journey continues: QgsArrowIterator is now merged! This makes it possible to iterate over QgsFeatures as Arrow batches.

This is where we are now, quoting


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QGIS to (Geo)Pandas follow-up

The conversation around Looking for better ways to convert between QGIS VectorLayer and (Geo)DataFrame is continuing over at


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Looking for better ways to convert between QGIS VectorLayer and (Geo)DataFrame

Plugin developers who want to use (Geo)Pandas-based functionality in their plugins regularly face the challenge of converting QGIS vector layers to (Geo)DataFrames. There is currently no built-in convenience function.

In Trajectools, so far, I have been performing the conversion manually, looping through all features and taking care of tricky column types, such as ...


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GeoLife GPS track collection processing with DuckDB, QGIS & Trajectools

The last time I preprocessed the whole GeoLife dataset, I loaded it into PostGIS. Today, I want to share a new workflow that creates a (Geo)Parquet file and that is much faster.

The dataset (GeoLife)

“This GPS trajectory dataset was collected in (Microsoft Research Asia) Geolife project by 182 users in a period of over three years (from April 2007 to August 201...


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