Geometric Overpass Extraction from Vector Road Data and DSMs
Venue
Proceedings of the 19th ACM SIGSPATIAL international Conference on Advances in Geographic information Systems, 2011 (to appear)
Publication Year
2011
Authors
Joshua Schpok
BibTeX
Abstract
We present a method to extract elevated road structures, typically overpassing
other roads, transit lines, and watercourses. The technique uses a digital surface
model (DSM) and roughly aligned vector road data and outputs geometry approximating
the shape and elevation of the elevated road deck. Our method is robust against
noise in DSM elevations and can recover elevated roads partially obscured by trees
and other overpasses. We demonstrate our method parallelized over city-wide DSMs,
and formulate a confidence metric ranking the fidelity of the reconstruction.
