Error on shapefile generation... What's wrong ?

[Jean-ChristopheBastin]

Hi GeoNet people 🙂

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

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.

I already asked this question on QGIS forums and mailing list, where the generated shapefile cannot be well displayed, but I didn't got many help. I hope I'll have more luck here.

You can find in attachment the source code of my class in VB.Net and some generated shapefiles.

Many thanks !

Regards,

[ÁkosHalmai]

Hi,

There is the Arc-version of your files.

I think (I'm not sure) the problem somewhere with the offset: length + offset is not enough because there is a record number too.

H.Á.

[Jean-ChristopheBastin]

Hi Ákos,

Thank you so much for your help !

I wasn't so far with my "+4 bug fix" in my previous post (+4 means index record size).

The +4 offset was put in the length of geometry object, not in the offset stored in index records.

You pointed to the right place, and I lost many time to test things that was already working.

It was just an issue in the way the index file was built.

Again, thank you very much, I'm definitly out with this bug now ! 🙂

Best regards,