How can I get a views filter to exclude non geocoded nodes?

Issue Summary

I have a view, in which I have gotten a proximity exposed filter to work perfectly.

But now I am running into an issue where nodes that are not properly geocoded, meaning for some reason or another they have not been assigned geo coordinates or wkt, are being returned with every search.

I have tried to add a filter that says geocoded value is NOT NULL but that it appears that it is referring to a specified address or something else, because it is still returning non-geocoded nodes.

Is there a work around to add a filter to simply say node must have a geocoded value or wkt?

Thanks for your time,
Andy :)