A tropical rainforest is an ecosystem type that occurs roughly within the latitudes 28 degrees north or south of the equator (in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn). This ecosystem experiences high average temperatures and a significant amount of rainfall. Rainforests can be found in Asia, Australia, Africa, South America, Central America, Mexico and on many of the Pacific, Caribbean, and Indian Ocean islands. Within the World Wildlife Fund's biome classification, tropical rainforests are thought to be a type of tropical wet forest (or tropical moist broadleaf forest) and may also be referred to as lowland equatorial evergreen rainforest.
West Kalimantan (Indonesian: Kalimantan Barat') is a province of Indonesia. It is one of five Indonesian provinces in Kalimantan, the Indonesian part of the island of Borneo. Its capital city Pontianak.
The province has an area of 147,307 km² with a recorded 2010 census population of 4,393,239. Major ethnic groups include the Dayak, Malay, Chinese, which make up about 90% of the total population. Other groups include the Javanese, Bugis, and Madurese.
The borders of West Kalimantan roughly trace the mountain ranges surrounding the watershed of the Kapuas River, which drains most of the province.