University of Freiburg, Algorithms and Data Structures

Graph database implementing the RDF and SPARQL standards, more info and demos at https://qlever.dev

UI for the QLever SPARQL engine, featuring context-sensitive autocompletion and other goodies

Efficient and lossless conversion of PBF files from OpenStreetMap to RDF

Extension of the well-known pdftotext, with much better extraction quality and semantic capabilities

Precise map-matching for public transit feeds. Generates high-quality GTFS shapes from OSM data.