Regular building model

characterized by rectangular outline and flat/slope/gable roof

is a general construction style

widely existing as either independent building or components of complex one.This study proposed an algorithm for building model reconstruction from airborne laser scanning data

based on feature line detection and separation of planimetric and height computations.The workflow is composed of five steps.First

ridge direction is detected in a series of horizontal plans between eaves and ridge of different heights.Second

points on the ridgeline are identified in a set of vertical sections

perpendicular to the ridgeline and within building extent.Third

planimetric parameters of feature lines are detected according to points located on them.Forth

height information is determined in vertical sections that go through each line.At last

8/10 coordinates are determined and a building model is established.