SC21 Proceedings

The International Conference for High Performance Computing, Networking, Storage, and Analysis

Monitoring Urban Changes with Ensemble of Neural Networks and Deep-Temporal Remote Sensing Data

Authors: Georg Zitzlsberger, Michal Podhoranyi, and Václav Svatoň (IT4Innovations, Czech Republic; VSB – Technical University of Ostrava, Czech Republic); Milan Lazecký (IT4Innovations, Czech Republic; University of Leeds); and Jan Martinovič (IT4Innovations, Czech Republic; VSB – Technical University of Ostrava, Czech Republic)

Abstract: Urban change detection with remote sensing data covers a wide field of applications like understanding socio-economic impacts, identifying new settlements, or analyzing trends of urban sprawl. It is used for decades. Analyses, however, are usually carried out manually by selecting high-quality samples, restricted to small scale scenarios either temporarily limited or with low spatial or temporal resolution. To process a large amount of available remote sensing observations for a selected period, we propose a fully automated method to train an ensemble of neural networks, without the need to manually select samples. We consider two eras with three sites, each with at least 500 km^2, and deep observation time series with hundreds up to over a thousand combined synthetic aperture radar (SAR) and multispectral optical observations. In order to train such large data sets, we apply data-parallel deep learning with Horovod and multiple NVIDIA Tesla V100 GPUs.

Best Poster Finalist (BP): no

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