camera doctor 25 Report post Posted August 1, 2011 My Sat Nav seems to think my car can go lower than sea level ! :lol: Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted August 1, 2011 It might be a prediction for 2012 Quote Share this post Link to post Share on other sites
bellicose 9 Report post Posted August 1, 2011 The average elevation of Timaru is 1 metre above sea level. So wouldn't be too hard to get a 'below sea level' reading i would think. Quote Share this post Link to post Share on other sites
camera doctor 25 Report post Posted August 1, 2011 The average elevation of Timaru is 1 metre above sea level. So wouldn't be too hard to get a 'below sea level' reading i would think. Yea, but 30 Meters below !!!! Quote Share this post Link to post Share on other sites
M5V8 337 Report post Posted August 2, 2011 (edited) height relative to sea level is probably the hardest measurement forsatnav's. it's the most likely measurement to have the largest margins for error. Edited August 2, 2011 by M5V8 Quote Share this post Link to post Share on other sites
hybrid 1043 Report post Posted August 2, 2011 A few things can cause this to cause DOP (Dilution of Precision) ... placement of GPS receiver, buildings or built up environments, weather and satlillite numbers and the position of the satillite counts. Note as a satillite gets lower on its horizon it becomes more in-accurate thus causing a higher DOP value. BMW's nav computers have some smarts/logic built in to deal with this. Lock to road is activated to deal with bad GPS signal or loss of signal. Much better than google's iphone map software for example which has none and is shocking as a mobile in-car GPS app. Quote Share this post Link to post Share on other sites
tarrbaby 0 Report post Posted August 2, 2011 (edited) low tide maybe? :lol: Edited August 2, 2011 by TarrBaby Quote Share this post Link to post Share on other sites
elmarco 56 Report post Posted August 2, 2011 Easy fix - turn off the U-Boat mode. It's a feature that BMW installed in case they had to take the North Atlantic by stealth... Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted August 2, 2011 A few things can cause this to cause DOP (Dilution of Precision) ... placement of GPS receiver, buildings or built up environments, weather and satlillite numbers and the position of the satillite counts. Note as a satillite gets lower on its horizon it becomes more in-accurate thus causing a higher DOP value. BMW's nav computers have some smarts/logic built in to deal with this. Lock to road is activated to deal with bad GPS signal or loss of signal. Much better than google's iphone map software for example which has none and is shocking as a mobile in-car GPS app. Yep, know what you mean with mobile in car nav units - the Navman in my work ute is crap in this regard too - slow to react to change of direction at intersections & cursor often veering off the road - compared to the BMW system - which is way superior. That said - can't say I have ever seen a - altitude reading on mine. Come to think of - don't think I have even seen it at 0 - even at sea level Quote Share this post Link to post Share on other sites
