OpenStreetMap
Something I wrote about OpenStreetMap (OSM)
Postiwyd gan Jeff Neitzel ar 2 Tachwedd 2015 yn English Diweddarwyd ddiwethaf ar 4 Tachwedd 2015.… and why it matters to me …
You can read it via Humanity, Geography, GIS, and Open Data if you like.
For the record, I updated this post yesterday.
Cheers & Pax! :^)