A spatial data infrastructure in which citizens, research institutions, private organizations and other businesses and non-governmental actors are recognized as key stakeholders of the infrastructure and in which public spatial data, but also private and citizen-generated spatial data is freely available to use for citizens, businesses and any other groups, without any restrictions.

Source: Mulder, A. E., G. Wiersma, B. van Loenen (2020). Status of National Open Spatial Data Infrastructures: a Comparison Across Continents. International Journal of Spatial Data Infrastructures Research, 2020, Vol.15, 56-87.