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

[Shane Carey]

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>
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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