ОПИСАНИЕ

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.

ПРИМЕР

v.reclass input=land output=land_u type=boundary 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 map land_u containing 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.

ПРИМЕЧАНИЯ

No table is created for reclassed layer if column option is used and column type is integer (there is nothing which could be written to the table).

For dissolving common boundaries, see v.extract.

ИЗВЕСТНЫЕ ОШИБКИ

No table is created for reclassed layer if rules option is used.

СМ. ТАКЖЕ

v.dissolve, v.extract, v.reclass, GRASS SQL interface

АВТОР

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