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Mapper since:
November 14, 2019


I’m Alessia Marchionna, OSM & GIS consultant at United Nations Global Service Center (UNGSC).

I have been mapping since 2019 and have a master’s degree in Geophysics awarded at the University of Bari.

This user is participating to an organised editing activity called Unite Maps Initiative, run by the United Nations Global Service Center (UNGSC).

The organisation and this user care for the OpenStreetMap project, the community’s consensus, mapping practices and guidelines.
You can get in touch with the UN Mappers community sending an e-mail to