public void TestSetMaxDistance()
{
var options = GeoNearOptions.SetMaxDistance(1.5);
var expected = "{ 'maxDistance' : 1.5 }".Replace("'", "\"");
Assert.AreEqual(expected, options.ToJson());
}
public void TestGeoNear()
{
database = server.GetDatabase("osm");
var collection = database.GetCollection("map");
var query = Query.EQ("properties.amenity", new BsonString("pub"));
// coordinates for the excel centre
double lon = 51.5060089;
double lat = 0.0371037;
var earthRadius = 6378.0; // km
var rangeInKm = 3000.0; // km
var options = GeoNearOptions
.SetMaxDistance(rangeInKm / earthRadius /* to radians */)
.SetSpherical(true);
var results = collection.GeoNear(query, lat, lon, 10, options);
Assert.AreEqual(10, results.Hits.Count);
}
static void Main(string[] args)
{
var client = new MongoClient(connectionString);
var server = client.GetServer();
var database = server.GetDatabase("osm");
var collection = database.GetCollection("map");
var query = Query.EQ("properties.amenity", new BsonString("pub"));
double lon = 51.5060089;
double lat = 0.0371037;
var earthRadius = 6378.0; // km
var rangeInKm = 3000.0; // km
var options = GeoNearOptions
.SetMaxDistance(rangeInKm / earthRadius /* to radians */)
.SetSpherical(true);
var results = collection.GeoNear(query, lat, lon, 10, options);
foreach (var result in results.Hits)
{
try
{
var name = result.Document["properties"]["name"];
Console.WriteLine(String.Format("{0}",
name
));
}
catch (Exception e)
{
}
}
Console.ReadKey();
}
public IEnumerable <PlaygroundEntity> GetByLocation(float lat, float lng)
{
var earthRadius = 6378.0; // km
var rangeInKm = 10.0; // km
GetCollection().EnsureIndex(IndexKeys.GeoSpatial("Loc"));
//var near =
// Query.GT("ExpiresOn", now);
var options = GeoNearOptions
.SetMaxDistance(rangeInKm / earthRadius /* to radians */)
.SetSpherical(true);
GeoNearResult <PlaygroundEntity> results = GetCollection().GeoNear(
Query.Null,
lng, // note the order
lat, // [lng, lat]
200,
options
);
return(results.Hits.Select(result => result.Document));
}
public static GeoNearOptionsBuilder getGeoNearOption(double rangeInM)
{
return(GeoNearOptions.SetMaxDistance(rangeInM / earthRadius /* to radians */)
.SetSpherical(true).SetDistanceMultiplier(earthRadius));
}