[gdal-dev] OGRLayer.Intersection() question

[Ari Jolma]

On 10/10/2013 09:33 PM, Tamas Szekeres wrote:
> Dheeraj,
>
> I don't think the OSGeo.OGR.Layer.Intersection supports progress 
> notification. You might probably have encountered a bug which should 
> be fixed. Do you have a sample code to reproduce this issue? I would 
> specifically interested in the actual geometries have been passed to 
> the function.

Layer::Intersection supports progress notification but support in the 
Swig layer may not be complete. There is of course a possibility of a 
bug in the Layer::Intersection code too.

Ari

>
> Best regards,
>
> Tamas
>
>
>
> 2013/10/10 Dheeraj Reddy Mamidi <drmamidi at rothwellgroup.com 
> <mailto:drmamidi at rothwellgroup.com>>
>
>     Hi list,
>
>     I have troubles with C# bindings of OGR. I was trying to perform
>     intersection on two feature classes (shape file formats) using
>     OSGeo.OGR.Layer.Intersection(), but have problems making it work.
>     I keep getting an error saying "AccessViolationException was
>     unhandled. Attempted to read or write protected memory. This is
>     often an indication that other memory is corrupt.
>
>     Is the above error something to do with
>     SWIGTYPE_p_GDALProgressFunc callback and OSGeo.OGR.SWIGTYPE_p_void
>     callback_data arguments? I tried passing those parameters null as
>     suggested by some in the forums butI keep getting the error
>     "Attempt to dereference null GDALProgressFunc". I am not sure what
>     that means.
>
>     And when I instantiate callback as new
>     SWIGTYPE_p_GDALProgressFunc() and new callback_data as new
>     SWIGTYPE_p_void(), I don't get error Attempt to dereference null
>     GDALProgressFunc, but still have error saying
>     AccessViolationException was unhandled. Attempted to read or write
>     protected memory. This is often an indication that other memory is
>     corrupt.
>
>     Can someone please help me figure this out and let me know how to
>     make use of OSGeo.OGR.Layer.Intersection() in the right way with
>     c# bindings. Thank you.
>
>     Thanks,
>     Dheeraj
>
>
>
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