[GRASS-dev] about simple feature/ogr direct processing

[Martin Landa]

Hi,

2010/4/6 G. Allegri <giohappy at gmail.com>:
> Ok, I see in http://trac.osgeo.org/grass/changeset/39161. The core
> work is done in open.c depending on the @Mapset name. If it's 'ogr'
> the vectors are opened as direct ogr, and level 1 (without topoloy).
> So also polygons can be opened as level 1?

direct read access means that topology is build when OGR datasource is
open. You can avoid build-topo-on-open when you link OGR layer via
v.external, then topology is saved in topo file (which can cause
problems when original data is modified and 'topo' file remains
out-dated).

Martin

-- 
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa