{"guid":"be9019cd-fc37-5a8e-926a-ed6fce89c482","title":"Wann ein Polygon eigentlich valide ist – eine Reise vom Kaffeebauer bis zum EU-Portal","subtitle":null,"slug":"fossgis2026-84258-wann-ein-polygon-eigentlich-valide-ist-eine-reise-vom-kaffeebauer-bis-zum-eu-portal","link":"https://pretalx.com/fossgis2026/talk/G3RAFS/","description":"Man meint es sei eigentlich ganz einfach: Der Kunde lädt seine Geodaten hoch, man verarbeitet sie und leitet sie weiter. Doch was ein valides Polygon ist, darüber haben verschiedenste Stellen verschiedenste Ansichten – und auch Open-Source-Bibliotheken sind sich da alles andere als einig. Anhand einiger Praxisbeispiele aus dem Zusammentreffen von Kaffeeindustrie, Geodaten und EU-Regulierung illustriert der Vortrag die Vielfalt an Fallstricken und wie man ihrer Herr werden kann.\n\nLicensed to the public under https://creativecommons.org/licenses/by/4.0/","original_language":"deu","persons":["Christoph Friedrich"],"tags":["G3RAFS","2026","fossgis2026","Daten, Datenbanken und Datenprozessierung","HS4 (ZHG 008)","fossgis2026-deu","Day 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