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

[Helmut Kudrnovsky]

Markus Metz-3 wrote
> On Sun, Oct 22, 2017 at 10:51 PM, Helmut Kudrnovsky <

> hellik@

> > wrote:
>>
>> >That explains a lot of the errors. Thus I should import only one of >the
>> site types A, B, C at a time, e.g. v.in.ogr where="SITETYPE='A'",
>>correct?
>>
>> yes
>>
>> >Unfortunately, with the example I mentioned, the two overlapping
>>polygons
>> are both of site type B, suggesting that the update of the >database did
> not
>> remove the old entry
>>
>> sites of the same type shouldn't overlap, these are artefacts of
>> different
>> data sources over Europe compiled in a not "cleaned" data set
> 
> In this case, the user has to decide what is correct. Both polygons have
> the same "RELEASE_DA: 2017-01-30", no way to decide which one is newer.
>>
>> I'm aware that not all of these issues could/should be "automagically"
>> solved during import, some precision errors/self intersection/....
>> correction would be nice :-)
> 
> v.in.ogr can fix precision errors with a suitable value for snapping.
> Areas
> that are too small to be considered valid areas can be removed with
> v.clean
> tool=rmarea. For everything else, as in the example above, the user must
> decide what is correct and what not.
> 
> In short, software "a" can fix errors created by software "b", but most
> often only humans can fix human errors. In the end, human decision about
> what is correct and what not is needed. Regarding the problem with
> Natura2000, I am pretty sure that someone added a certain site and that
> same person, and/or another one doing cross-checking, did not notice that
> there is an earlier version of that site, maybe with a different name but
> same location.
> 
> Markus M
>>
>>
>>
>> -----
>> best regards
>> Helmut
>> --
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I agree with you all above. :-)

I'm in exchange with EEA as data provider to improve this nice data set. 

Could you send me off-list your example site mentioned above, then I will
forward the issue to the data provider.



-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html