NAME
v.category - Attach, delete or report vector categories.
SYNOPSIS
v.category
v.category help
v.category input=string [output=string] [type=string[,string,...]] [option=string] [cat=integer] [field=integer[,integer,...]] [step=integer]
Parameters:
- input=string
- Name of input vector
- output=string
- Name of output vector
- type=string
- Select type: point, line, boundary, centroid or area
- Options: point,line,boundary,centroid,area
- Default: point,line,boundary,centroid,area
- option=string
- Action to be done:
add - add a new category
del - delete category
chfield - change field number (e.g. field=3,1 changes all fields 3 to field 1)
sum - add the value specified by cat option to the current category value
report - print report (statistics)
print - print category values
- Options: add,del,chfield,sum,report,print
- Default: add
- cat=integer
- Category value
- Default: 1
- field=integer
- Field value
- Default: 1
- step=integer
- Category increment
- Default: 1
DESCRIPTION
v.category attaches, deletes or reports vector categories.
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.
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2003/08/18 13:40:36 $
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