[Qgis-user] best way to change srs definitions

[Giovanni Manghi]

On Tue, 2012-04-17 at 12:06 +0000, Duarte Carreira wrote:
> I’m trying to change some srs definitions to include natgrids
> transformations. On QGIS (osgeo4w) what must I change? How to manage
> updates to qgis – will these rewrite over my definitions?

I usually add them using the "custom CRS" menu. This entries are kept
when updating.

cheers

-- Giovanni --