designing GIS water system

Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter or energy between the body and its environment.

Water supply pipeline network is a system which has a large of spatial ... best way is that designing a water supply network based on GIS

GIS (Geographic Information System) technology is a computer system that collect, store, mange, analyze, display and apply geographical data, it is a universal technology that analyze and process large geographical data, it's characteristic spatial analyze function and visual expression function are fit the character