[GRASS-user] update cat column in vector data set

[Stefan Luedtke]

Dear friends, 

I am struggling with the following point. 

I have created a shape of subbasins based on a raster data set. Since
this yields some tiny (pixel size) areas, I run "v.clean" with a certain
threshold to remove/append those artifacts. However, the resulting
vector data set still holds all categories of the old one, even so, some
areas have been removed. 

So my question: How can I update these values that the number of
categories matches the number of areas?

I tried v.category (but der is not update function). 

Cheers, 

Stefan
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