I have compiled a bunch of data released by the UNECE and government agencies into a multilingual searchable database on my website. In total it's about 2000 database entries in 4 languages, so about 8000 database entries, 2MB compressed data total. This has taken a lot of time, work and effort to do, so I included some random "nonsense strings" into the database to be able to find out if someone had scraped my site for the content.
Now it turns out that someone has.
While searching for one of the random nonsense strings I found another website which appears to have copied the content from my site onto their own.
What should I do? I guess contacting them and kindly asking them to either link to my site or to take the information down would be a first step. But can I claim any form of copyright on the data that I have compiled?
Addition: The data in question consists of technical specifications (i.e. measurements, technical names, properties, etc). The site that has copied the data from my website has not included all the details (yet), just a summary of them - however, it's the exact same summary that I have on my website, which then links to pages with more details. Not sure if it matters, but it makes it obvious that there was no reorganization or other "creative" work on their part, simply cut'n'paste.