[GRASSLIST:8509] Re: v.out.ogr - VERY slow!

[Hamish]

> I'm running grass60. Linux. Need to export some layers to shp.  Having
> used v.out.ogr in grass57 and found it to be quite fast, it is
> painfully slow in 6.0, even for moderate sized files. E.g,:
> 
> This took about 1/2 an hour!!
> 
> -rw-r--r--  1 caumann caumann 43092713 Oct  5 13:21 neareasforest1.dbf
> -rw-r--r--  1 caumann caumann      407 Oct  5 13:19 neareasforest1.prj
> -rw-r--r--  1 caumann caumann 18240640 Oct  5 13:21 neareasforest1.shp
> -rw-r--r--  1 caumann caumann    76908 Oct  5 13:21 neareasforest1.shx
> 
> What gives?


Probably you are exporting many large complicated polygon features?

1/2 and hour isn't bad. A week is bad. ;) Think of it as an enforced
coffee break.

You need to break up boundaries into smaller chunks (doesn't affect
topology, just the way it is stored). GRASS 6.1-cvs has v.split which
will do this for you.



Hamish