[GRASS-user] v.patch problem (v.6.1cygwin)

GRASS GRASS user
1

Hello.

Why v.patch doesn’t create automatically a dbf table? I’m using v.6.1 version (cygwin). And, if not, how can I do that manually?

The files are originally *.shp with polyline rivers. I have no problem to import and patch them, but I need a table to later reclass the file based on a column attribute.

Thank you.

Miguel.

2

Miguel Correia wrote:

Why v.patch doesn't create automatically a dbf table? I'm using
v.6.1version (cygwin).

Because for the DB patch to work, the two dbf table definitions must be
exact. IIUC newer versions of GRASS will attempt to combine the tables.
A GRASS 6.2.1 Cywin version is now available for download.

And, if not, how can I do that manually?

There is a script called "v.append" in the wiki add-ons page to do that.
http://grass.gdf-hannover.de/wiki/GRASS_AddOns#Vector_add-ons

Hamish

3

Hamish wrote:

Miguel Correia wrote:

Why v.patch doesn't create automatically a dbf table? I'm using
v.6.1version (cygwin).

Because for the DB patch to work, the two dbf table definitions must be
exact. IIUC newer versions of GRASS will attempt to combine the tables.

Yes, if you use -e switch.

Maciek