Drawing perspective is a method of portraying objects on a flat surface so that the dimensions shrink with distance. Each set of parallel, straight edges of any object, whether a building or a table, follows lines that eventually converge at a vanishing point. Typically this convergence point is somewhere along the horizon, as buildings are built level with the flat surface. When multiple structures are aligned with each other, such as buildings along a street, the horizontal tops and bottoms of the structures typically converge at a vanishing point. When both the fronts and sides of a building are drawn, then
Point-to-point Lee model Point-to-point Lee model The Lee model for point-to-point mode is a radio propagation model that operates around 900 MHz. Built as two different modes, this model includes an adjustment factor that can be adjusted to make the model more flexible to different regions of propagation. This model is suitable for using in data collected in a specific area for point-to-point links. Frequency: 900 MHz band The Lee model for point to point mode is formally expressed as: formula_1 where, "L" = The median path loss. Unit: decibel (dB) "L" = The reference path loss along 1 km. Unit: decibel (dB)