In general I, and lots of other users have been struggling with find the data when using the documentation on the web and not because we have the underlying notebooks installed locally. Its not very clear where the data is. How can we improve this situation @jbednar, @droumis and others?
It is documented, but not in a particularly accessible place. The Census notebook (Census — Examples 0.1.0 documentation) which is the first item on the Topics page (Topics — Datashader v0.14.3) has a “Download this project” link right at the top, and this download contains a project file that links to everything you need to run the demo code.