[GRASS-user] Loading JSON data in GRASS

[Moritz Lennert]

On 30/11/14 06:10, arighna roy wrote:
> Hi,
>
>   I am trying to append points to a new map patch_map6.
>
> v.patch -e input=patch_map1 output=patch_map6
>
> When I run the above command I get the following error.
>
> ERROR: Key column not found
>
> I don't know which column it is looking for.

The "key column" is the column in the attribute table containing the 
category values (~ ids) of the features in your map, thus allowing to 
link the features to the attributes.

You can use 'v.db.connect -p patch_map1' to see the details of the 
connection for patch_map1.

Moritz