[GRASS5] vector point extract script

[Radim Blazek]

Hamish wrote:
> Hamish:
> 
>>>not knowing enough SQL magic to do this properly*, I've written a
>>>little script to extract point data from vector points files,
>>>including x,y(,z) and any selected columns from the db of the same
>>>name.
>>>
>>>Assumes db and vector file both have the same category number/order.
>>>This may well be a bad assumption!
>>>
>>>v.out.ascii.db: 
>>>  http://grass.gdf-hannover.de/twiki/bin/view/GRASS/GrassAddOns
>>>
>>>
>>>[*] I guess make 2 new columns containing x,y values then db.select.
>>>How?
> 
> 
> Radim:
> 
>>paste is probably dangerous, a record aor point can be missing. Isn't
>>it better to use join (input must be sorted;
> 
> 
> Yes it is; thanks. Script updated to use sort+join.
> 
> 
> 
>>use -e for attributes)?
> 
> 
> Use -e where? for what?

To print lines with missing attributes in join.

Radim