[Qgis-developer] Issue with Shapefile creation algorithm

[Jean-Christophe Bastin]

Thank you for the answer Maximilian

Indeed, the Python console shows me None for some geometries.
Do you know any tool that can analyse what's wrong with the shape ?
Maybe something that can translate the shp file into a readable format 
according to specifications from 
https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf ?

Regards,

JCB

Le 18/03/2016 14:54, Maximilian Krambach a écrit :
> For the one shape I get 7 valid and one "none" geometries (the last
> feature).
> for the other shape, just a "none" geometry
>
> It seems that some "end of file" is off.
>
> Function I used with the python console in QGIS:
>
> layer = iface.activeLayer()
> for feature in layer.getFeatures():
>      print feature
>      print feature.geometry()
> print layer.featureCount()
>
>
> Am 18.03.2016 um 14:18 schrieb Jean-Christophe Bastin:
>> Hi QGIS Developers :-)
>>
>> I asked some help on QGIS support, but they told me that I don't ask my
>> question at the right place, and that I should go througth developers
>> email list.
>> That's why I'm here. So let me explain what's going on.
>>
>> I developped an application with a class able to read data from an
>> Oracle database with MapXtreme (MapInfo), and convert them in Shapefile.
>> This class follows the ESRI specifications from here :
>> https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf
>> You can find in attach 2 samples that I tried to open in QGIS :
>> - 4480___S12_060_4 : there is only one polygon, but it is not displayed
>> on the map
>> - 4480___327550 : there are 8 polygons in this one, and all of them are
>> well displayed
>> The strange thing is that the polygon from "4480___S12_060_4" is common
>> with "4480___327550", but in one case it is not shown, and in the other
>> case it is shown.
>> I have no problem when I open these files with MapInfo.
>> I don't have ArcMap to check on this side.
>> The support told me they were not able to open my files with SAGA, but I
>> downloaded SAGA GIS 2.2.3 and was able to open the file without any issue...
>>
>> According to QGIS support, it looks like an issue in my creation
>> algorithm, but I really don't see what's wrong, it seems to follow well
>> the ESRI specifications.
>> I'm not a "GIS expert", so maybe some of you could help me to discover
>> what's wrong.
>> Or if you have any GIS tool that can tell me what's not correct in my
>> shapefile, it could really help me.
>>
>> You can find in attachment the source code of my class in VB.Net.
>>
>> Many thanks !
>>
>> Regards,
>>
>> JCB
>>
>>
>> 	
>> 	
>> 	
>>
>>
>>
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