BEIJING (AP) — China has released the baselines for a disputed shoal in the South China Sea it had seized from the Philippines, a move that could heighten tensions over overlapping territorial claims. The Foreign Office posted online the geographic coordinates for the baselines around Scarborough Shoal on Sunday. A nation’s territorial waters and exclusive economic zone are usually defined as the distance from the baselines. A 2016 ruling by an international arbitration court found most of China’s claims in the South China Sea to be invalid, but Beijing refuses to comply.