[Qgis-developer] QGIS creating defective shape-files?

[Maxim Dubinin]

Marco,

I looked the shapefile that you've provided. As I said, the problem
with some objects missing on certain scales is related to spatial index. If you remove
*.sbn and *.sbx files (you can do it safely, this doesn't modify the
data) and reload shapefile in ArcGIS, the problem seems to go away.

Now some thoughts/discussion points:

1. The fact that QGIS is showing everything correctly probably means
that it is simply ignoring spatial index (sbn,sbx) of the
shapefile, is this so? If so, I'm not sure if this is correct
strategy, use of this index might help to work with larger datasets.
As I can see, QGIS is creating its own index (qix), it might mean that
ESRI spatial index format is not open/effective?

3. And related, if the shapefile is loaded in QGIS (1.1) seems like it is
locked and cannot be loaded in ArcGIS _at all_, ArcGIS complains that
there is an error in the shapefile. Again, I'm not sure if this is the
correct behavior, locking on editing is good, locking on viewing,
hmm...

Maxim

Вы писали 23 июля 2009 г., 1:41:01:

MLFeV> Hi list,

MLFeV> I sent the broken shape to Maxim. Anybody else who wants to have a look
MLFeV> at it to solve the problem (and possibly fix a QGIS bug) don't heitate
MLFeV> to contact me. May it be helpful to increase the quality of QGIS.

MLFeV> Marco

MLFeV> P.S. please do not share these data to anybody, besides for solving this
MLFeV> problem. The data is not (yet) public.




MLFeV> Maxim Dubinin schrieb:
>> This sounds like a corrupted spatial index file. Can we have a look at
>> the shapefile that doesn't work well in ArcGIS?
>> 
>> SpatiaLite or not, shapefiles _should_ work correctly everywhere. Otherwise you're cutting out lots
>> of users.
>> 
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