[GRASS-dev] Vect_open_old versus Vect_open_old2 and layer/field constraint

[Martin Landa]

Hi,

2015-09-28 16:56 GMT+02:00 Vaclav Petras <wenzeslaus at gmail.com>:

[...]

> what is the meaning for native vector maps? Does this limit the layer as in
> case of Vect_set_constraint_field() or do I actually have to call
> Vect_set_constraint_field() to read features only in one layer?

AFAIK currently it has no meaning to native maps, `layer` argument is
used only by OGR direct access [1].

Ma

[1] https://trac.osgeo.org/grass/browser/grass/trunk/lib/vector/Vlib/open.c#L206

-- 
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa