Sentence 1: The bay is centred ( British mapping 1968 , Bulgarian mapping in 1993 and detailed Spanish mapping in 2005 and 2009 ) .
Sentence 2: The bay is centred at ( British mapping in 1968 , detailed Spanish mapping in 1993 , and Bulgarian mapping in 2005 and 2009 ) .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?