function createGeo() {
    $cnt = count( $this->geo );
    if( 0 >= $cnt )
      return;
    $attributes = $this->_createParams( $this->geo['params'] );
    $content    = null;
    $content   .= number_format( (float) $this->geo['value']['latitude'], 6, '.', '');
    $content   .= ';';
    $content   .= number_format( (float) $this->geo['value']['longitude'], 6, '.', '');
    return $this->_createElement( 'GEO', $attributes, $content );
  }