NAME
v.reclass - Changes vector category values for an existing vector map according to results of SQL queries.
SYNOPSIS
v.reclass
v.reclass help
v.reclass input=string output=string [rules=string] [col=string] [type=string[,string,...]] [field=integer]
Parameters:
- input=string
- Name of input vector
- output=string
- Name of output vector
- rules=string
- Full path to the reclass rule file
- col=string
- The name of the column values of which are used as new categories. The column must be type integer.
- type=string
- Select type: point, line, boundary, centroid or area
- Options: point,line,boundary,centroid,area
- Default: point,line,boundary,centroid,area
- field=integer
- Field value
- Default: 1
DESCRIPTION
v.reclass allows user to create a new vector map based on the reclassification
of an existing vector map.
Rules file may contain on each row either pair:
keyword value
(separated by space) or comment beginning by #(hash).
Definition of new category begins with keyword cat followed by new category value.
Keyword where specifies SQL where condition.
EXAMPLE
v.reclass input=land output=land_u type=area
rules=land.rcl
the rules file contains :
# land reclass file
cat 1
where use = 'E13' and owner = 'Jara Cimrman'
cat 2
where use = 'E14'
Produces a new vector area file land_u containing 'area'
boundaries from land with area category values selected
from database by SQL select statement: select id from tland where
use = 'E13' and owner = 'Jara Cimrman' changed to category 1;
values selected from database by SQL select statement: select id from tland where
use = 'E14' changed to category 2.
SEE ALSO
v.extract
AUTHOR
R.L. Glenn, USDA, SCS, NHQ-CGIS
from v.reclass to v.db.reclass and later to v.reclass in 5.7 rewritten by Radim Blazek
Last changed: $Date: 2004/06/30 09:49:28 $
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