Filtering Querysets with GeopositionField

[jangeador]

Can you please tell me how I can filter the recordset to only the records which contain data in the Geoposition Field.

I have tried:
object.queryset.filter(position__isnull=True) and that gives me nothing, now
object.queryset.filter(position__isnull=False) gives me all the records even though only some have geopositionfield populated.

[jvamvas]

Looking at the way empty values are currently stored in the database, I suggest the following hack: object.queryset.exclude(position='None')

[Voxmundi]

How can we filter according to specific lat long values?
I have tried:
queryset.filter(location__latitude__lte=Lat)