CREATE TABLE IF NOT EXISTS `markers` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `lat` float(10,6) NOT NULL,
  `lng` float(10,6) NOT NULL,
  `alt` float(5,1) NOT NULL,
  `hdop` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=0 ;