[GRASS-user] updating vector attributes for separate islands

[maning sambale]

Thanks! it's working now

On 8/17/09, Markus Metz <markus.metz.giswork at googlemail.com> wrote:
>
> 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
>


-- 
cheers,
maning
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