[GRASS5] Problems with vector import, and a suggestion
David D Gray
ddgray at armadce.demon.co.uk
Fri, 08 Feb 2002 19:17:54 +0000
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?