Tag Archives: OSTN15

Datum Transformations

Using OSTN15 with QGIS

As you may be aware, the United Kingdom has a new transformation model that is OSTN15. But why? What does it mean to the geospatial community? Without being too nerdy, tectonic plate movement means that the “model” surface (the geoid) is slowly moving away from being the best fit for the coordinate system. It has...