[GRASS5] Re: National British Grid

[Markus Neteler]

On Wed, Mar 06, 2002 at 06:45:25PM +0000, David D Gray wrote:
> Markus Neteler wrote:
> 
> > Hi,
> > 
> > I have a question if we want to extend the Transverse Mercator
> > definition mode (g.setproj etc.) by false northing?
> > It seem that the UK needs the x_0 to be defined:
> > 
> 
> 
> Do you mean y_0?

Yes, of course: y_0!
 
> It is x_0 : +400000
>        y_0 : -100000
> 
> for BNG. So yes that would be handy.

O.k, then I'll change that.

Markus

> > http://www.geocities.com/mapref/prj/uk/uk_osbg36.html
> > 
> > Also strange local map projections as found in Bolzano, Italy,
> > need false northing for Transverse Mercator.
> > 
> > If there are no objections, I would add it to
> > src/libes/gis/geo_init.c 
> > 
> > Markus
> > 
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