Filtering a list of geo locations

Hi,

I have an object which contains a list of geographic locations as this:

public List<GeoLocation> Locations{get; set;}

This list is being correctly (as far as I can see) indexed by EPiServer Find.

I would then like to use the Within method for each of the locations in the Locations-list to check if any of them are within the specified polygon specified in the Within method.

I've tried using MatchContained, which not really is an option - and also tried using Nested2Find (changing the Location-list to NestedList<GeoLocation> using as follows:

query.Filter(x => x.Locations, l => l.Within((IEnumerable<GeoLocation>) bounds));

but this throws an exception saying:

QueryParsingException[[myIndex_Dev] failed to find geo_point field []

Any ideas on how to accomplish what I'm looking for ?