[GRASS-user] large shapefile not importing properly with v.import

[Helmut Kudrnovsky]

Ken Mankoff wrote
> On 2017-10-20 at 18:22, Helmut Kudrnovsky <

> hellik@

> > wrote:
>> try to use v.in.ogr instead in a location with the original projection
>> and then reproject it.
> 
> If I import into its native projection with ~v.in.ogr~ it displays fine.
> If I then reproject with ~v.proj~, data is once again dropped.
> 
> ~v.in.ogr~ complained about overlaps, which I don't think should exist,
> even if they are valid in theory. I am currently re-importing with
> ~snap=1E-13~ as suggested by ~v.in.ogr~, but that is taking a few hours.
> Anyway, it seems likely the reprojection won't work in this case either.
> 
> I find it strange that QGIS handles this both instantly and correctly (at
> least correctly based on a cursory visual examination).
> 
>   -k.

QGIS doesn't use a topological data model when it displays such data; GRASS
tries to rebuild correct topology when importing such data; that's may be
the difference.

Have you tried to reproject your data with ogr2ogr?



-----
best regards
Helmut
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