[GRASS-user] updating vector attributes for separate islands

[Markus Metz]

maning sambale wrote:
> Hi,
>
> I imported a shapefile of provinces in grass.  The shapefile has
> around 84 provinces composed of different islands.  The attribute
> table contains only 84 rows corresponding to 84 provinces.  I used
> v.clean bpol tool to topologically clean the vectors.  Then used
> v.db.droptable and add a new  a table to add island names for each
> polygon.
>
> The new table created still contain 84 rows and when I edit an island
> centroid the island name is also added to the other polygon covered by
> the same province.
>   
They all have the same category number, so if you add a row to the 
attribute table, all polygons with that category number will use that 
row. You can set new categories for each polygon separately with 
v.category in a new layer 2, then add a table for layer 2 and edit the 
attribute table.

Markus M