public function getSQLFilter($radius, $scale = 'km'){
		// set Latitude and Longditude Columnnames
		GeoFunctions::$Latitude = $this->name.'Latitude';
		GeoFunctions::$Longditude = $this->name.'Longditude';

		return GeoFunctions::getSQLSquare($this->getLatitude(), $this->getLongditude(), $radius, $scale);
	}