Ok I will auto-answer to this question based on you answer with more accuracy data based on http://www.eoss.org/pubs/nmeafaq.htm NMEA 0183 sentences= up to 82 Ascii chars-->one sentence per second-->82 bytes per second
so 60*60*24*82=7084800 based on zzip examples text compresion http://debin.net/zzip/results.php aprox 5:1 ratio text compresion so 7084800/5=1416960--->1,35Mbytes each day of raw NMEA zziped data For sure there will be more efficient ways to store GPS Track information (maybe GPX xml format, or JOSM storage data format) but as worst case NMEA raw format makes me think you can store easyly a full week of gps data in less than 10MB. So I hope this information will be usefull to any one , for me it has been a good exercice to know more about gps --- Schmidt András <[EMAIL PROTECTED]> escribió: > David Samblas Martinez wrote: > > 24 hour of gps data log how big (in bytes or > > multiples) can be? I have no expercience with gps > > tracking so I hope I have not said any "no sense" > > idea > > > That's easy to count. Let's say you log 100 bytes > every second (that's > more than enough for longitude, latitude, timestamp, > velocity, height > and some satellite information). Then that will be > 60*60*24*100=8640000 > bytes for a whole day. That's about 9M. If you just > need location and > timestamp then it is 16-20 bytes per sample and can > be dramatically > compacted using differential encoding. > > If you are interested in Geocaching you should check > the Yama map viewer > project: > http://yamamap.wiki.sourceforge.net/ > It has an online Demo applet here: > http://yamamap.org/demo.php > > > Schmidt András > > > _______________________________________________ > OpenMoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community > ______________________________________________ ¿Con Mascota por primera vez? Sé un mejor Amigo. Entra en Yahoo! Respuestas http://es.answers.yahoo.com/info/welcome _______________________________________________ OpenMoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
