[GRASS-user] Update of vector table through selections in the map

[Dylan Beaudette]

On Monday 05 June 2006 14:11, Jonathan Aguero wrote:
> Dear List,
>
> I am trying to update the value of several records in a vector table
> simultaneously. The elements to be updated need to be selected in the map.
> I know you can update the values one by one with v.digit or using
> qgis/GRASS but I want to update several each time, something like the
> "calculate values" in the table using ARC-GIS.
>
> PD: I am using pgsql for the tables.
>
> Any idea is welcome, thanks!
>

1. Determine some relationship between vector points and the data you wish to 
populate a column with

2. run the SQL:
update mytable set mycolumn = myvalue where myexpression = something

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341