public function geoFilter($shape = self::GEO_FILTER_SQUARED, $unit = self::GEO_FILTER_KILOMETERS, $distance, $isNegative = false) {
		$parameters = array(
	        'shape' => $shape,
	        'unit' => $unit,
	        'distance' => $distance
	    );
	    $this->addFilter(null, self::GEO_FILTER, $isNegative, $parameters);
		return $this;
	}