What exactly does the disjoint operator do in the GEOS operators of
v.select (6.5+) ? It is described as
"disjoint - features do not spatially intersect"
Which sounds pretty much like the reverse of the intersect operator.
However, when I try the following in the nc_spm_06 NC data set:
v.extract input=roadsma...@permanent output=cary list=1004
v.select -g ainput=roadsma...@permanent atype=line binput=c...@user1
btype=area output=roads_disjoint_cary operator=disjoint
I get:
http://geog-pc40.ulb.ac.be/grass/misc/disjoint.png
whereas
v.select -r -g ainput=roadsma...@permanent atype=line binput=c...@user1
btype=area output=roads_reverse_intersect_cary operator=intersects
gives me:
http://geog-pc40.ulb.ac.be/grass/misc/reverse_intersect.png
Is this a bug in the disjoint operator, or am I misinterpreting its
meaning ?
Moritz
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