Road surface aerial photo training dataset

Training dataset for road surface classification on OpenNRW (https://www.geoportal.nrw) aerial imagery. Samples are pixel-wise labelled tiles over the are of the city of Bonn and its surroundings. The aerial photos are coming from the North Rhine-Westphalia geoportal (available at https://www.geoportal.nrw) and are licensed under the DE-DL Zero 2.0 license.

Contains three classes:

* 0: Non-road area
* 1: Road with compact surface (asphalt, concrete, ...)
* 2: Road with modular surface (sett, paving stone, ...)