Boundaries of urban areas of the world combining data from different sources. The purpose of this dataset is to provide information about urban areas that helps to determine speed-limits for OpenStreetMap roads across the world in a more accurate manner.
Starting point for this layer is Urban Areas of the world by Stanford (2012) that uses the Oak Ridge National Laboratory's LandScan population database.
This data has been improved by replacing country specific data from:
- Finland, according "taajama-alue" (conurbation) which delineates the lower speed limit zones.
- Data source: YKR Taajama, Finnish Environmental Institute