[GRASSLIST:7221] Extract vector features from two (or more) maps?
david.p.finlayson at gmail.com
Sat Jun 18 04:01:11 EDT 2005
I am hoping someone can elaborate on this wiki post:
Q: How to extract from two layers and to make a selection at the same time?
A: You have to create a third map layer (or add the spread attributes
to one layer) and upload the attributes from layer 1 and 2 to layer 3
(v.to.db option=query qcol=), then use v.extract on layer 3
A short example would be helpful.
Also, from the help file for v.to.db what are layers and qlayers?
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