code: public function retrieveMapData($left, $bottom, $right, $top)
  	{
  		// Set the API base
  		$base = 'map?bbox=' . $left . ',' . $bottom . ',' . $right . ',' . $top;
  
  		// Build the request path.
  		$path = $this->getOption('api.url') . $base;
  
  		// Send the request.
  		$response = $this->oauth->oauthRequest($path, 'GET', array());
  
  		return simplexml_load_string($response->body);
  	}
docs: Method to retrieve map data of a bounding box
  
  @param   float  $left    Left boundary
  @param   float  $bottom  Bottom boundary
  @param   float  $right   Right boundary
  @param   float  $top     Top boundary
  
  @return  array  The XML response
  
  @since   1.0