[QGIS-Developer] what does geos geoprocessing error difference failed mean?

[Jeff McKenna]

Not sure.  My next step would be to upgrade to QGIS 3.10.0 and retry.

-jeff



On 2019-11-26 10:20 AM, Shane Carey wrote:
> Thanks Jeff,
> 
> Yep, I've tried running this and still makes no difference I'm afraid. I 
> thought it may have been a memory issue but its not that either.
> So I'm lost as to what is causing it.
> Cheers
> Le gach dea ghui,
> */Shane Carey/*
> */GIS and Data Solutions Consultant/*
> 
> 
> On Tue, Nov 26, 2019 at 2:19 PM Jeff McKenna 
> <jmckenna at gatewaygeomatics.com <mailto:jmckenna at gatewaygeomatics.com>> 
> wrote:
> 
>     Hi Shane,
> 
>     Likely it means that there is a problem with your geometry/topology.  I
>     don't have your version locally, but look for a QGIS menu item of
>     "Check
>     Validity" or "Fix Geometries".
> 
>     -jeff
> 
> 
> 
>     -- 
>     Jeff McKenna
>     MapServer Consulting and Training Services
>     https://gatewaygeomatics.com/
> 
> 
>     On 2019-11-26 9:48 AM, Shane Carey wrote:
>      > Hi,
>      >
>      > I'm running a union process in qgis 3.4 and I keep getting the
>     following
>      > error:
>      > *geos geoprocessing error difference failed*
>      > What does this error mean?
>      > Thanks
>      > Le gach dea ghui,
>      > */Shane Carey/*
>      > */GIS and Data Solutions Consultant/*
>      >
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-- 
Jeff McKenna
MapServer Consulting and Training Services
https://gatewaygeomatics.com/