other versions
- wheezy 6.4.2-2
- jessie 6.4.4-1
- testing 7.2.0-2
- unstable 7.2.0-2
- experimental 7.2.1-1~exp1
v.overlay(1grass) | Grass User's Manual | v.overlay(1grass) |
NAME¶
v.overlay - Overlays two vector maps.KEYWORDS¶
vector, geometrySYNOPSIS¶
v.overlayFlags:¶
- -t
-
- --overwrite
-
- --verbose
-
- --quiet
-
Parameters:¶
- ainput=name
-
- atype=string[,string,...]
-
- alayer=integer
-
- binput=name
-
- btype=string[,string,...]
-
- blayer=integer
-
- output=name
-
- operator=string
-
- olayer=integer[,integer,...]
-
DESCRIPTION¶
v.overlay allows the user to overlay two vector area maps. The resulting output map has a merged attribute-table. The origin column-names have a prefix ( a_ and b_) which results from the ainput- and binput-map.NOTES¶
Currently only areas are supported for the operators or and xor! See also v.select. The operator defines what kind of operation will be done. Features are written to output, if the result of an operation 'ainput operator binput' is true. Attributes of the tables from ainput and binput are joined into a new table linked to the output maps new cat-column.EXAMPLE POLYGON TO POLYGON UNION¶
EXAMPLE LINE TO POLYGON CLIPPING¶
Using the North Carolina sample dataset, we clip the roads map to the area of city of Raleigh:where="ZIPNAME = 'RALEIGH'"
out=roadsmajor_raleigh operator=and
SEE ALSO¶
v.db.connect, v.select, g.copyAUTHORS¶
Radim Blazek, ITC-Irst, Trento, Italy Last changed: $Date: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $ Full index © 2003-2011 GRASS Development TeamGRASS 6.4.2 |