The city has grown from its original centre along the river into a sprawling metropolis surrounded by swaths of suburban residential development extending north and south into neighbouring provinces. The highly populated and growing cities of Nonthaburi, Pak Kret, Rangsit and Samut Prakan are effectively now suburbs of Bangkok. Nevertheless, large agricultural areas remain within the city proper at its eastern and western fringes, and a small number of forest area is found within the city limits: , amounting to 0.4 percent of city area. Land use in the city consists of 23 percent residential use, 24 percent agriculture, and 30 percent used for commerce, industry, and government. The BMA's City Planning Department (CPD) is responsible for planning and shaping further development. It published master plan updates in 1999 and 2006, and a third revision is undergoing public hearings in 2012.