## DESCRIPTION

v.category attaches, deletes or reports vector categories to map geometry. These categories (IDs) are used to link a vector map to an attribute table.

## NOTES

Use v.to.db to upload the related categories a linked attribute table.

## EXAMPLES

1) Report vector categories
v.category in=testmap option=report

    FIELD 1:
    type       count        min        max
    point          0          0          0
    line        1379          1       1379
    boundary       0          0          0
    centroid       0          0          0
    area           0          0          0
    all         1379          1       1379

2) Delete all vector categories in field 1
v.category in=testmap out=outmap option=del

3) Add vector categories in field 1 with step=2
v.category in=outmap out=stepmap option=add step=2

    FIELD 1:
    type       count        min        max
    point          0          0          0
    line        1379          1       2757
    boundary       0          0          0
    centroid       0          0          0
    area           0          0          0
    all         1379          1       2757

4) Add categories/centroids to a vector map without categories
v.category in=wkt out=wktnew option=add

Results can be tested using d.what.vect.

## SEE ALSO

v.db.connect, v.to.db

## AUTHOR

Radim Blazek, ITC-Irst, Trento, Italy

Last changed: $Date: 2005/06/21 19:40:48 $