Organizers say 17 people have signed up to take part . The chain is expected to stretch for about 250 miles ( 400 kilometers ) Convergence and Union party politicians are calling for a vote on self-determination by 2016 . We are bound together by geography , history and our people , as more than 40 percent of Catalonia 's population came from other parts of Spain or has close family ties . But the Spanish government says that Catalonia already has sufficient home-rule powers .
Organizers say 17 people have signed up to take part . The chain is expected to stretch for about 250 miles ( 400 kilometers ) Convergence and Union party politicians are calling for a vote on self-determination by 2016 . But the Spanish government says that Catalonia already has sufficient home-rule powers .