Pontianak is the capital of the Indonesian province of West Kalimantan. It is a large trading port city on the island of Borneo. Pontianak occupies an area of 107.82 km² in the delta of the Kapuas River. It is located almost precisely on the equator, hence it is widely known as Kota Khatulistiwa (Equator City). The city center is actually less than 3 kilometres (2 mi) south.