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Vectorization of road data extracted from aerial and UAV imagery

: Bulatov, Dimitri; Häufel, Gisela; Pohl, Melanie

Fulltext urn:nbn:de:0011-n-4106240 (4.2 MByte PDF)
MD5 Fingerprint: 01758e3ad721e360a02e9ecc2ff74da2
Created on: 25.8.2016

Halounova, L. ; International Society for Photogrammetry and Remote Sensing -ISPRS-:
XXIII ISPRS Congress 2016. Commission III : 12-19 July 2016, Prague, Czech Republic; From Human History to the Future with Spatial Information
Istanbul: ISPRS, 2016 (ISPRS Archives XLI-B3)
International Society for Photogrammetry and Remote Sensing (ISPRS Congress) <23, 2016, Prague>
Conference Paper, Electronic Publication
Fraunhofer IOSB ()
curvature; classification; road datbases; thinning; topology; vectorization

Road databases are essential instances of urban infrastructure. Therefore, automatic road detection from sensor data has been an important research activity during many decades. Given aerial images in a sufficient resolution, dense 3D reconstruction can be performed. Starting at a classification result of road pixels from combined elevation and optical data, we present in this paper a fivestep procedure for creating vectorized road networks. These main steps of the algorithm are: preprocessing, thinning, polygonization, filtering, and generalization. In particular, for the generalization step, which represents the principal area of innovation, two strategies are presented. The first strategy corresponds to a modification of the Douglas-Peucker-algorithm in order to reduce the number of vertices while the second strategy allows a smoother representation of street windings by Bezir curves, which results in reduction – to a decimal power – of the total curvature defined for the dataset. We tested our approach on three datasets with different complexity. The quantitative assessment of the results was performed by means of shapefiles from OpenStreetMap data. For a threshold of 6 m, completeness and correctness values of up to 85% were achieved.