[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
>>vector format.
> 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?


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