[GRASS-user] temporarily edit tables (dbf) outside of GRASS

GRASS GRASS user
1

Hello,
I need to do some calculations on my attribute tables.

What is the corresponding command in GRASS for this?

Is it safe to edit the DBF-table outside of GRASS in another program?
For instance in OpenOfficeCalc?
Or even as a CSV with Python, IDL, etc.?

I will use a scripting language to calculate new fields based the existing
values in the table.

After the calculations I would like to use this new values in GRASS.

Although, I know that GRASS is fully scriptable I am a beginner in GRASS.
Therefore, I do not want to transfer my existing code to a GRASS script
(also due to time restrictions).
Hopefully, I will be able to do that on a later stage.

Thanks and kind regards,
Tim M.

2

On 30/11/07 11:40, Tim Michelsen wrote:

Hello,
I need to do some calculations on my attribute tables.

What is the corresponding command in GRASS for this?

v.db.addcol
v.db.update

Is it safe to edit the DBF-table outside of GRASS in another program?
For instance in OpenOfficeCalc?
Or even as a CSV with Python, IDL, etc.?

Yes. You can actually create whatever dbf you want, wherever you want as long as it contains a column with the id's of the objects. Then you can connnect your vector map to this dbf with v.db.connect.

Moritz