public static SpacePoint <string> FindNearest(this ISpaceManager sm, SpacePoint <string> center, float within)
{
var pan = new PointNfo <string>(null, Single.MaxValue);
return(sm.AggregateWithin(center, pan, within, (aggr, curr, cen, dis) =>
{
if (dis < aggr.Distance)
{
aggr.Point = curr;
aggr.Distance = dis;
}
return aggr;
}).Point);
}
