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

[Markus Metz]

On Mon, Oct 29, 2012 at 7:11 PM, Laura Poggio <laura.poggio at gmail.com> wrote:
> Thank you very much for the information. As I am not using vectors very
> often it should be rather safe.

As Paulo wrote, v.build is all you need to convert between GRASS 6 and
GRASS7 (any way). v.build does not modify the vector coordinates or
geometry objects, therefore it is safe to use in both versions.

Markus M

>
> Thanks
>
> Laura
>
>
> On 29 October 2012 11:34, Paulo van Breugel <p.vanbreugel at gmail.com> wrote:
>>
>> 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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