Improved Road Network Reconstruction using Discrete Morse Theory

With the rapid growth of publicly available GPS traces, robust and efficient automatic road network reconstruction has become a crucial task in GIS data analysis and applications. In [20], an effective and robust road network reconstruction algorithm was developed based on the discrete Morse theory, which has the state-of-the-art performance in automatic road-network reconstruction. Based on a discrete Morse-based graph reconstruction framework, we provide two improvements of the previous algorithm [20]: (1) we further simplify it and obtain a better empirical time performance; and (2) we develop a simple but effective editing strategy that helps adding missing road segments in the output reconstruction.