[GRASSLIST:1048] Finding area where sit points without PostgreSQL

[tlaronde at polynum.org]

Hello,

I have a vectorial map with text which insertion point is inside the area
it should be associated with. I have used PostgreSQL geometric extensions
to find where the point (insertion) is in ( '(x,y)' @ boundary ). But :

1) I would prefer to use the geometric/topological tool, i.e. GRASS, to do
this kind of things, and not use database extensions ;

2) The results are not always good (i.e. PostgreSQL miss some points that 
indeed lie inside an area --- the area boundaries where extracted from GRASS);

Is there a way to do it automatically (batch) in GRASS.
Alternate: has someone tips to make it work correctly under PostgreSQl (I still
prefer a GRASS based solution but I'd like to understand if there are 
subtilities under PostgreSQL).

TIA.