I see that there is data used for testing VTK and ParaView or at data.kitware.com, but there is no explicit license associated with those datasets that I can find. I was looking into using a few of the datasets for integrating into testing of PyVista and wanted to inquire whether this is acceptable use.
It looks to me that the ParaView dataset on data.kitware.com is a subset of the data on the download site. I assume at least that portion would follow the same license, i.e BSD. The same for the VTK collection too.