Geo-information and computational geometry
Nederlandse Commissie voor Geodesie eBooks · 2006
Data points interior to the building may be used to estimate the height of a supposedly flatroofed building, or they may be used to extract the form of the roof.This is attempted by calcucosines.For simple roof shapes this will give the primary roof orientation, and the pattern of normals indicates the roof form.This information may then be integrated into the surface model. Building Extrusion Using Euler OperatorsWe start by creating a 2.5D TIN model and Euler Operators are used to extend the TIN (Tse and Gold, 2002).Building boundaries are added on the terrain surface.Then the boundaries are extruded from the ground surface to the height of the building using Euler Operators.Algorithms for cartograms and other specialized maps