Representation and Reconstruction of Triangular Irregular Networks with Vertical Walls

Representation and Reconstruction of Triangular Irregular Networks with Vertical Walls

Gorte, B.G.H.
Lesparre, J.

Aerospace Engineering

Remote Sensing

2012-05-16

Point clouds obtained by aerial laser scanning are a convenient input source for high resolution 2.5d elevation models, such as the Dutch AHN-2. More challenging is the fully automatic reconstruction of 3d city models. An actual demand for a combined 2.5d terrain and 3d city model for an urban hydrology application led to the design of an extension to the well-known Delaunay triangulated irregular networks (TINs) as to accommodate vertical walls. In addition we introduce methods to generate and refine models adhering to our data structure. These are based on combining two approaches: a representation of the TIN using stars of vertices and triangles, together with segmenting the TIN on the basis of coplanarity of adjacent triangles. The approach is supposed to deliver the complete model including walls at the correct locations, without relying on additional map data, as these often lack completeness, actuality and accuracy, and moreover most of the time do not account for parts facades not going down to street level. However, automatic detection of height discontinuities to obtain the exact location of the walls is currently still under implementation

TIN
Point cloud
reconstruction
3d data representation

http://resolver.tudelft.nl/uuid:e489128e-2bb5-47e5-ad8c-e110f471d27b

https://doi.org/10.5194/isprsarchives-XXXVIII-4-C26-15-2012

International Society of Photogrammetry and Remote Sensing (ISPRS)

7th International Conference on 3D Geoinformation, Quebec, Canada, 16-17 May 2012; International Archives od the Photogrammetry, Remote Sensing and Spatial Information Sciences, XXXVIII-4/C26

Institutional Repository

conference paper

© 2012 The Author(s)
This work is distributed under the Creative Commons Attribution 3.0 License