[GRASS-dev] v.in.ogr and v.import do not import all features in gpkg file
veroandreo at gmail.com
Tue Oct 9 11:32:38 PDT 2018
Many thanks for your answer :)
El mar., 9 oct. 2018 a las 19:42, Markus Metz (<
markus.metz.giswork at gmail.com>) escribió:
> On Tue, Oct 9, 2018 at 2:11 PM Veronica Andreo <veroandreo at gmail.com>
> > A follow up:
> > If I convert the gpkg to shapefile and import into GRASS, then all
> points are imported:
> > v.import input=central.shp layer=central output=central --overwrite
> > Check if OGR layer <central> contains polygons...
> > Creating attribute table for layer <central>...
> > Importing 30 features (OGR layer <central>)...
> > -----------------------------------------------------
> > Building topology for vector map <central at testing>...
> > Registering primitives...
> > Input <central.shp> successfully imported without reprojection
> > v.db.select -c central | wc -l
> > 30
> > What could be the problem with gpkg and how to test further??
> The problem is that the bounding box included in the gpkg does not cover
> all points: these missing 2 points are outside the bbox embedded in the
> gpkg. As a safety measure, v.in.ogr applies a spatial filter using the
> input layer's bbox to exclude corrupt features (previously observed in some
> shapefiles). This spatial filter is passed directly to OGR and as a
> consequence, OGR provides only 28 and not 30 points to v.in.ogr.
And how is this bounding box created/defined, I was not aware of it.
I only converted from .kml to gpkg and then imported into GRASS.
> I am not sure what to do about this. Disable this safety check again?
Maybe the bb safety check makes sense for features other than points,
dunno. Others can for sure tell some use cases that I am not aware of. But
I can say that it is pretty striking to see that some features are "eaten
and lost" when importing into GRASS while ogr and others show everything.
What about a flag? Import all by default and the safety check with a flag?
Or at least a note in the manual page of v.in.ogr
many thanks again :)
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