RavenDB Spatial Index - Child Property - ravendb

Question

I've got a spatial index and search working in a prototype and now I'm trying to integrate it into our proper solution that has a slightly different data model and it's not coming back with any search results.
These are my classes
public class SpatialDataModel
{
public int Id { get; set; }
public string Title { get; set; }
public SpatialDataShapeModel SpatialDataShape { get; set; }
}
public class SpatialDataShapeModel
{
public int Id { get; set; }
public DbGeography Shape { get; set; }
}
I've defined the index a couple of ways:
public class SpatialDatasIndex: AbstractIndexCreationTask<SpatialDataModel>
{
public SpatialDatasIndex()
{
Map = points => from p in points
select new
{
Id = p.Id,
__ = SpatialGenerate("Coords", p.SpatialDataShape.Shape.Latitude, p.SpatialDataShape.Shape.Longitude)
};
}
}
and
public class SpatialDatasIndex: AbstractIndexCreationTask<SpatialDataModel>
{
public SpatialDatasIndex()
{
Map = points => from p in points
select new
{
Id = p.Id,
__ = SpatialGenerate("Coords", p.SpatialDataShape.Shape.AsText())
};
Spatial(x=>x.SpatialDataShape.Shape, o=>o.Geography.Default());
}
}
Here i'm using the type DbGeography and and trying to get out the WKT
and I'm trying to query like this:
using (var session = _documentStore.OpenSession())
{
data = session.Query<SpatialDataModel, SpatialDatasIndex>()
.Customize(x => x.WithinRadiusOf(
fieldName: "Coords",
radius: 1,
latitude: query.Lat,
longitude: query.Lng))
.Take(query.PageSize)
.ToList();
}
Any help getting this working would be great, I can't find much documentation and the bits on the Raven site I've read many times.
UPDATE
JSON
{
"Title": "Test 1",
"SpatialDataShape": {
"Id": 1,
"Shape": {
"Geography": {
"CoordinateSystemId": 4326,
"WellKnownText": "POINT (-0.1217937469482422 51.51461834694225)"
}
}
}
}