public object DistanceFrom(
    IEnumerable<Coordinate> coordinates) {
    IEnumerable<DbGeography> addresses = coordinates.Select(
        c =>
            DbGeography.FromText(String.Format("POINT ({0} {1})", c.Longitude, c.Latitude)));
    IEnumerable<VehicleGeography> vehicles = this.GPSInsightProvider.Query().Document.Placemarks.Select(
        p =>
            new VehicleGeography {
                DriverName = p.DriverName,
                Point = DbGeography.FromText(String.Format("POINT ({0} {1})", p.Point.Longitude, p.Point.Latitude))
            });
    ICollection<object> technicians = new List<object>();

    foreach (DbGeography address in addresses) {
        technicians.Add(vehicles.Select(
            v =>
                new {
                    DriverName = v.DriverName,
                    Distance = v.Point.Distance(address) / 1609.344
                }).Where(
            v =>
                v.Distance.HasValue).OrderBy(
            v =>
                v.Distance).Take(3).Select(
            v =>
                new {
                    DriverName = v.DriverName,
                    Distance = String.Format("{0:#.#}", v.Distance)
                }));
    }

    return technicians;
}

public object DistanceFrom(IEnumerable<Coordinate> coordinates)
    {
        IEnumerable<DbGeography> addresses = coordinates.Select(c =>
            DbGeography.FromText(String.Format("POINT ({0} {1})", c.Longitude, c.Latitude)));
        IEnumerable<VehicleGeography> vehicles = this.GPSInsightProvider.Query().Document.Placemarks.Select(p =>
            new VehicleGeography
            {
                DriverName = p.DriverName,
                Point = DbGeography.FromText(String.Format("POINT ({0} {1})", p.Point.Longitude, p.Point.Latitude))
            });
        ICollection<object> technicians = new List<object>();

        foreach (DbGeography address in addresses)
        {
            technicians.Add(
                vehicles
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = v.Point.Distance(address) / 1609.344
                        })
                    .Where(v =>v.Distance.HasValue)
                    .OrderBy(v =>v.Distance)
                    .Take(3)
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = String.Format("{0:#.#}", v.Distance)
                        }));
        }

        return technicians;
    }

technicians.Add(
                vehicles
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = v.Point.Distance(address) / 1609.344
                        })
                    .Where(v =>v.Distance.HasValue)
                    .OrderBy(v =>v.Distance)
                    .Take(3)
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = String.Format("{0:#.#}", v.Distance)
                        }));

var vehiclesByDistance =
                vehicles
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = v.Point.Distance(address) / 1609.344
                        })
                    .Where(v =>v.Distance.HasValue)
                    .OrderBy(v =>v.Distance);

            technicians.Add(
                vehiclesByDistance
                    .Take(3)
                    .Select(v =>
                        new
                        {
                            DriverName = v.DriverName,
                            Distance = String.Format("{0:#.#}", v.Distance)
                        }));