Simplified 3D city models from LiDAR

Simplified 3D city models from LiDAR

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

Aerospace Engineering

Remote Sensing

2012-08-25

Aerial laser scan data is widely used to produce 2½D digital elevation models automatically. However, creating full 3D city models from this data is a complex task. A simplified 3D model, like a 2½D model with vertical walls will be easier to produce automatically, especially when the model is not produced to look nice, but just to give realistic results in an analysis or a simulation. To be able to include vertical walls in a 2½D model we extend the TIN data structure in such way that the height of a vertex is stored implicitly in a way that allows multiple heights and efficient processing at the same time. To generate the city model we first apply data reduction in planar areas of an initial TIN. Next, we segment the TIN into planar segments for the ground, walls and roof planes. Finally, we intersect the segments to obtain a 2½D model with slightly slanted walls, which should be adjusted to become exactly vertical. The results for simulated point cloud data are near-perfect. Real aerial laser scan data are more challenging, but the method still gives promising results.

LiDAR
point cloud
TIN
data reduction
segmentation
reconstruction
3D city model

http://resolver.tudelft.nl/uuid:04e213ea-6102-4789-81c3-b2e2a2ebccf0

International Society for Photogrammetry and Remote Sensing (ISPRS)

XXII ISPRS Congress, Commission II, Melbourne, Australia, 25 August-1 September 2012; IAPRS XXXIX-B2, 2012

Institutional Repository

conference paper

(c) 2012 The Author(s)