[GRASS5] Problems with vector import, and a suggestion
David D Gray
ddgray at armadce.demon.co.uk
Fri Feb 8 14:17:54 EST 2002
Radim Blazek wrote:
> On Thursday 07 February 2002 16:37, Michel Wurtz wrote:
>>On the other hand, I believe much in postgis, which could be a nice
>>"container" for all vector and site stuff in grass, with only an
>>import/export function for the actual vector and site format,
>>leaving only rasters in flat files. I will be specialy interested
>>by what Radim think about that and the possible impact on grass51
> I think that in 90% of cases flat files are better because of :
> - complicated database administration
> - performance
> - running postgresql server required (think about PDA
> or CD-ROM with data+viewer distribution)
> - missing topology in PostGIS
> (i am not talking about mapservers here where is distinct situation).
> Due to all mentioned above, I think that we need both flat files and PostGIS
> and so grass51 is designed now.
> PostGIS support is very weak now but there are people working on that on
> University of Sannio / Benevento.
There is the possibility of storing topology with PostGIS (or by means
of another extension). Perhaps in 'hidden' fields (attributes). Has
there been any discussion on this?
More information about the grass-dev