Manila is located on the eastern shore of Manila Bay, on the island of Luzon. The Pasig River flows through the middle of the city, dividing it into the north and south sections. The city comprises 16 administrative districts: Binondo, Ermita, Intramuros, Malate, Paco, Pandacan, Port Area, Quiapo, Sampaloc, San Andres, San Miguel, San Nicolas, Santa Ana, Santa Cruz, Santa Mesa and Tondo. It is divided into six political districts for the purposes of its representation in the Congress of the Philippines and the election of city council members. In 2018, the Globalization and World Cities Research Network listed Manila as an "Alpha-" global city and ranked it seventh in economic performance globally and second regionally (behind Delhi, India in the latter case), while the Global Financial Centres Index ranks Manila 79th in the world.