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<TITLE>RE: Logging huge tracklogs - Was [OSM-talk] South Downs Way</TITLE>
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<P><FONT SIZE=2>Cool.<BR>
I didn't know how big a point was, so took an educated guess. I wasn't too far out, I guess.<BR>
<BR>
I've checked the tracklog saved to microSD by the latest firmware update, and can confirm that it's the FULL tracklog, with all points present (ie, not simplified as happens when a tracklog is 'saved' in the Garmin world)<BR>
Thus, it is very suitable for our purposes.<BR>
<BR>
The Venture Cx with a 1Gb microSD card looks even better...<BR>
<BR>
Phillip<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: talk-bounces@openstreetmap.org on behalf of Gabriel Ebner<BR>
Sent: Mon 7/10/2006 7:24 PM<BR>
To: talk@openstreetmap.org<BR>
Subject: Re: Logging huge tracklogs - Was [OSM-talk] South Downs Way<BR>
<BR>
On Sun, Jul 09, 2006 at 06:53:32PM +0100, Barnett, Phillip wrote:<BR>
> The recent firmware update for Garmin Legend CX to 2.50 added the<BR>
> facility to log tracks to the MicroSD datacard. If you enable this, it<BR>
> creates a fresh tracklog every day and stores each daily log as a GPX<BR>
> file.<BR>
> As the Garmin manual says, 'Log track to Data card - Records the current<BR>
> track log data to the microSD card in addition to the unit's internal<BR>
> memory. This feature is a tool for use by advanced GPS users with<BR>
> special applications for the tracklog data. Track logs on the data card<BR>
> are .gpx GPS position data files, and are not used by your unit.'<BR>
> The default microSD card is 32Mb, or 64Mb if you're lucky like me (more<BR>
> than advertised, in other words) 1Gb microSD cards are about 30 quid in<BR>
> the UK. How many track points can you get into a 1 Gb card at one point<BR>
> per second?<BR>
> My rough estimate is about a year and a half.<BR>
<BR>
Each point takes 116 bytes, so on a 950M card there should be room for about<BR>
8587475.86 nodes (not counting headers), that makes around 99.39 days of<BR>
continous 1 pt/s logging, so if you just log 4 hours a day the card will last<BR>
for 596.35 days, that's 1.63 years.<BR>
<BR>
Gabriel.<BR>
<BR>
<BR>
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