[GRASS-user] patching/merging vector maps and their tables

[Andreas Philipp]

Thanks for the hints,
indeed it works perfectly and also the attribute tables are merged now. I 
think I was just confused about using the word "Copy" and singular form in 
the help text, because it is not just simple copying when merging the tables 
(the meaning of "layer" is clear).

May be it would be clearer to say:

"-e Merge also attribute tables. Only tables of layer 1 and of same structure 
are currently supported"

instead of 

"-e Copy also attribute table. Only the table of layer 1 is currently 
supported"

Just a thought,
thanks,
Andreas


> Andreas Philipp napisa?(a):
> > I have to patch a series of line vector maps together (adjacent tiles).
> > Each of the tiles is linked to an dbf table with a column of the same
> > name and type  for each map ("hgt" as double).
> > Now I want to patch them together in order to perform v.surf.rst in one
> > run.
> >
> > v.patch does not merge two tables (that's what "v.patch help" says) but
> > copies only the first table.
>
> It doesn't say that. It says:
>
> 	$ v.patch help
>
> 	<snip>
>
> 	  -a   Append files to existing file
> 	  -e   Copy also attribute table. Only the table of layer 1 is
> 	currently supported
>
> Which means that v.patch in Grass 6.1 will patch tables too (provided
> that the structure of tables is the same) and -e is used. The reference
> to "layer" is a Grass sense of this word - read:
> http://grass.itc.it/grass61/manuals/html61_user/vectorintro.html under
> "Layers".
>
> Maciek