Hamburg Transparency Portal (transparenz.hamburg.de) publishes 245,643 open datasets for Germany. Browse them live in Vizzie and turn any one into a map or chart.
Hamburg Transparency Portal (transparenz.hamburg.de) is the open-data portal for Germany, covering Hamburg. It runs on CKAN, an open catalogue standard used by many national governments. You can browse it directly at suche.transparenz.hamburg.de.
On Hamburg Transparency Portal (transparenz.hamburg.de), most datasets here are clearly licensed — only a small share are undeclared. It's important to know that "no licence declared" is not the same as public-domain or free-to-use. Undeclared data carries no explicit permission to copy, adapt, or redistribute it — so reusers should treat it cautiously and check with the publisher before relying on it. Vizzie flags each dataset's licence (or its absence) so you can see this before you build.
Of the 245,148 datasets here whose licence Vizzie can identify, essentially all of them can be used commercially; 0% carry a share-alike condition, so work built on them has to be published under the same terms. Attribution is required by almost every open licence — Vizzie writes the attribution line for you when you export or publish.
No download, no GIS specialist. Opens in Vizzie.