DESCRIPTION
v.overlay allows the user to overlay to vector area maps.
There are 3 links attached to features in output map,
- field 1: link to the new table, new table has 3 columns
- cat - key column linking rows to features
- cata - category of afield from ainput
- catb - category of bfield from binput
- field 2: category of afield from ainput
- field 3: category of bfield from binput
NOTES
Currently only areas are supported! See also v.select.
Attributes of the tables from ainput and binput are joined into a new table
linked to the output map.
v.db.connect map=outputmap table=ainput.dbf
field=2
v.db.connect map=outputmap table=binput.dbf
field=3
Attention: Removing the output map will also delete all tables linked to
it! Therefore it is advisable to copy tables from ainput and binput first and
connect the copied tables to the output map.
EXAMPLE
v.overlay ainput=lake binput=province output=lakeXprovince
SEE ALSO
v.db.connect,
v.select,
g.copy
AUTHORS
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date$