[GRASS-user] use of grass 6.4 and 7 on the same location/mapsets

[Paulo van Breugel]

If you are in 6.4 and want to open a vector layer created in grass 7 (or
the other way around), you can use v.build.

Alternatively, you can also open the layer, and in the layer manager, right
click the layer and select 'rebuild topology'. Rebuilding is very quick in
my experience and hasn't give me any trouble, whether rebuilding  from 6.4
to 7 or the other way around.

Cheers,

Paulo



On Mon, Oct 29, 2012 at 12:24 PM, Nick Cahill <ndcahill at wisc.edu> wrote:

> I found that once I'd converted my vectors to Grass 7, I couldn't go back.
> I ended up going back to 6.4 and having to restore old vectors from a
> backup. It was a pain. Is there an easy way to convert back?
>
> Thanks,
>
> Nick Cahill
>
>
> On Oct 29, 2012, at 11:59 AM, Maris Nartiss wrote:
>
> > If they are not accessed at a same time, then only problem will be
> > with vector data. GRASS 7 uses a bit different vector data storage
> > format and thus vector data can be used (displayed) only after a
> > v.build run. It's a bit annoying and I don't know if it can introduce
> > any problems (I mean when going G7->G6 vectors), still I haven't
> > observed any.
> >
> > In conclusion - for raster - doesn't matter; vectors - better stick to
> > one version.
> >
> > Maris.
> >
> > 2012/10/28 Laura Poggio <laura.poggio at gmail.com>:
> >> Dear list,
> >> are any problems in having mapsets accessed from different version of
> GRASS
> >> (6.4.2. and 7)?
> >>
> >> Thank you
> >>
> >> Laura
> >>
> >>
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